From 15fd23c374eb32c50733de1906065f552afbfbc4 Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Sun, 14 Feb 2021 09:15:51 +0300 Subject: use shortcut echo syntax for php templates --- include/login_form.php | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'include/login_form.php') diff --git a/include/login_form.php b/include/login_form.php index aec305b13..aa6a72260 100755 --- a/include/login_form.php +++ b/include/login_form.php @@ -92,29 +92,29 @@

- @@ -185,7 +185,7 @@

-- cgit v1.2.3-54-g00ecf From 26d6b84a572b5cbd99acffc5ae727ea6d1be543a Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Tue, 16 Feb 2021 14:23:00 +0300 Subject: add namespaced controls with unified naming; deprecated old-style control shortcuts --- classes/feeds.php | 22 ++- classes/handler/public.php | 4 +- classes/pref/feeds.php | 27 ++-- classes/pref/filters.php | 21 +-- classes/pref/prefs.php | 41 +++-- classes/pref/system.php | 4 +- include/controls.php | 383 +++++++++++--------------------------------- include/controls_compat.php | 312 ++++++++++++++++++++++++++++++++++++ include/functions.php | 1 + include/login_form.php | 2 +- plugins/mail/init.php | 2 +- 11 files changed, 470 insertions(+), 349 deletions(-) create mode 100644 include/controls_compat.php (limited to 'include/login_form.php') diff --git a/classes/feeds.php b/classes/feeds.php index f3ce1e48b..aa1f889e0 100755 --- a/classes/feeds.php +++ b/classes/feeds.php @@ -583,7 +583,7 @@ class Feeds extends Handler_Protected { function subscribeToFeed() { print json_encode([ - "cat_select" => format_feed_cat_select("cat", false, 'dojoType="fox.form.Select"') + "cat_select" => \Controls\select_feeds_cats("cat") ]); } @@ -607,8 +607,8 @@ class Feeds extends Handler_Protected { if (DB_TYPE == "pgsql") { print "

"; print "" . __("Language:") . ""; - print_select("search_language", get_pref('DEFAULT_SEARCH_LANGUAGE'), Pref_Feeds::get_ts_languages(), - "dojoType='fox.form.Select' title=\"".__('Used for word stemming')."\""); + print \Controls\select_tag("search_language", get_pref('DEFAULT_SEARCH_LANGUAGE'), Pref_Feeds::get_ts_languages(), + "title=\"".__('Used for word stemming')."\""); print "

"; } @@ -668,6 +668,15 @@ class Feeds extends Handler_Protected { display : none; } + - - + +

diff --git a/classes/pref/system.php b/classes/pref/system.php index f0a5f7b7f..d3b733364 100644 --- a/classes/pref/system.php +++ b/classes/pref/system.php @@ -90,12 +90,12 @@ class Pref_System extends Handler_Administrative {

- __("Errors"), E_USER_WARNING => __("Warnings"), E_USER_NOTICE => __("Everything") - ], 'dojoType="fox.form.Select" onchange="Helpers.EventLog.refresh()"') ?> + ], 'onchange="Helpers.EventLog.refresh()"', "severity") ?>

diff --git a/include/controls.php b/include/controls.php index f706931db..34a4af1f2 100755 --- a/include/controls.php +++ b/include/controls.php @@ -1,326 +1,133 @@ "; - foreach ($values as $v) { - if ($v == $default) - $sel = "selected=\"1\""; - else - $sel = ""; + $rv = ""; -} + $rv .= ""; + } -function print_select_hash($id, $default, $values, $attributes = "", $name = "") { - if (!$name) $name = $id; + $rv .= ""; - print ""; -} + $values = []; -function format_hidden($name, $value) { - return ""; -} + while ($row = $sth->fetch()) { + array_push($values, $row["caption"]); + } -function print_hidden($name, $value) { - print format_hidden($name, $value); -} + return select_tag($name, $value, $values, $attributes, $id); + } -function format_checkbox($id, $checked, $value = "", $attributes = "") { - $checked_str = $checked ? "checked" : ""; - $value_str = $value ? "value=\"$value\"" : ""; + function select_hash(string $name, $value, array $values, string $attributes = "", string $id = "") { + $dojo_type = strpos($attributes, "dojoType") === false ? "dojoType='fox.form.Select'" : ""; - return ""; -} + $rv = ""; - if ($v == $default) - $sel = "checked"; - else - $sel = ""; + return $rv; + } - if ($v == $true_is) { - $sel .= " value=\"1\""; - } else { - $sel .= " value=\"0\""; - } + function hidden_tag(string $name, string $value) { + return ""; + } - print " $v "; + function checkbox_tag(string $name, bool $checked, string $value = "", string $attributes = "", string $id = "") { + $is_checked = $checked ? "checked" : ""; + $value_str = $value ? "value=\"".htmlspecialchars($value)."\"" : ""; - } -} + return ""; + } -function print_feed_multi_select($id, $default_ids = [], - $attributes = "", $include_all_feeds = true, - $root_id = null, $nest_level = 0) { + function select_feeds_cats(string $name, int $default_id = null, string $attributes = "", + bool $include_all_cats = true, string $root_id = null, int $nest_level = 0, string $id = "") { - $pdo = Db::pdo(); + $ret = ""; - print_r(in_array("CAT:6",$default_ids)); + if (!$root_id) { + $ret .= ""; - if ($include_all_feeds) { - $is_selected = (in_array("0", $default_ids)) ? "selected=\"1\"" : ""; - print ""; - } - } + $pdo = \Db::pdo(); - if (get_pref('ENABLE_FEED_CATS')) { + if (!$root_id) $root_id = null; - if (!$root_id) $root_id = null; + $sth = $pdo->prepare("SELECT id,title, + (SELECT COUNT(id) FROM ttrss_feed_categories AS c2 WHERE + c2.parent_cat = ttrss_feed_categories.id) AS num_children + FROM ttrss_feed_categories + WHERE owner_uid = :uid AND + (parent_cat = :root_id OR (:root_id IS NULL AND parent_cat IS NULL)) ORDER BY title"); + $sth->execute([":uid" => $_SESSION['uid'], ":root_id" => $root_id]); - $sth = $pdo->prepare("SELECT id,title, - (SELECT COUNT(id) FROM ttrss_feed_categories AS c2 WHERE - c2.parent_cat = ttrss_feed_categories.id) AS num_children - FROM ttrss_feed_categories - WHERE owner_uid = :uid AND - (parent_cat = :root_id OR (:root_id IS NULL AND parent_cat IS NULL)) ORDER BY title"); + $found = 0; - $sth->execute([":uid" => $_SESSION['uid'], ":root_id" => $root_id]); + while ($line = $sth->fetch()) { + ++$found; - while ($line = $sth->fetch()) { + if ($line["id"] == $default_id) { + $is_selected = "selected=\"1\""; + } else { + $is_selected = ""; + } - for ($i = 0; $i < $nest_level; $i++) - $line["title"] = " " . $line["title"]; + for ($i = 0; $i < $nest_level; $i++) + $line["title"] = " " . $line["title"]; - $is_selected = in_array("CAT:".$line["id"], $default_ids) ? "selected=\"1\"" : ""; + if ($line["title"]) + $ret .= sprintf("", + $line["id"], htmlspecialchars($line["title"])); - printf("", - $line["id"], htmlspecialchars($line["title"])); + if ($line["num_children"] > 0) + $ret .= select_feeds_cats($id, $default_id, $attributes, + $include_all_cats, $line["id"], $nest_level+1, $id); + } - if ($line["num_children"] > 0) - print_feed_multi_select($id, $default_ids, $attributes, - $include_all_feeds, $line["id"], $nest_level+1); + if (!$root_id) { + if ($include_all_cats) { + if ($found > 0) { + $ret .= ""; + } - $f_sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds - WHERE cat_id = ? AND owner_uid = ? ORDER BY title"); + if ($default_id == 0) { + $is_selected = "selected=\"1\""; + } else { + $is_selected = ""; + } - $f_sth->execute([$line['id'], $_SESSION['uid']]); + $ret .= ""; + } + $ret .= ""; + } - while ($fline = $f_sth->fetch()) { - $is_selected = (in_array($fline["id"], $default_ids)) ? "selected=\"1\"" : ""; + return $ret; + } - $fline["title"] = " " . $fline["title"]; - - for ($i = 0; $i < $nest_level; $i++) - $fline["title"] = " " . $fline["title"]; - - printf("", - $fline["id"], htmlspecialchars($fline["title"])); - } - } - - if (!$root_id) { - $is_selected = in_array("CAT:0", $default_ids) ? "selected=\"1\"" : ""; - - printf("", - __("Uncategorized")); - - $f_sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds - WHERE cat_id IS NULL AND owner_uid = ? ORDER BY title"); - $f_sth->execute([$_SESSION['uid']]); - - while ($fline = $f_sth->fetch()) { - $is_selected = in_array($fline["id"], $default_ids) ? "selected=\"1\"" : ""; - - $fline["title"] = " " . $fline["title"]; - - for ($i = 0; $i < $nest_level; $i++) - $fline["title"] = " " . $fline["title"]; - - printf("", - $fline["id"], htmlspecialchars($fline["title"])); - } - } - - } else { - $sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds - WHERE owner_uid = ? ORDER BY title"); - $sth->execute([$_SESSION['uid']]); - - while ($line = $sth->fetch()) { - - $is_selected = (in_array($line["id"], $default_ids)) ? "selected=\"1\"" : ""; - - printf("", - $line["id"], htmlspecialchars($line["title"])); - } - } - - if (!$root_id) { - print ""; - } -} - -function print_feed_cat_select($id, $default_id, $attributes, $include_all_cats = true, - $root_id = null, $nest_level = 0) { - - print format_feed_cat_select($id, $default_id, $attributes, $include_all_cats, $root_id, $nest_level); -} - -function format_feed_cat_select($id, $default_id, $attributes, $include_all_cats = true, - $root_id = null, $nest_level = 0) { - - $ret = ""; - - if (!$root_id) { - $ret .= ""; - } - - return $ret; -} - -function stylesheet_tag($filename, $id = false) { - $timestamp = filemtime($filename); - - $id_part = $id ? "id=\"$id\"" : ""; - - return "\n"; -} - -function javascript_tag($filename) { - $query = ""; - - if (!(strpos($filename, "?") === false)) { - $query = substr($filename, strpos($filename, "?")+1); - $filename = substr($filename, 0, strpos($filename, "?")); - } - - $timestamp = filemtime($filename); - - if ($query) $timestamp .= "&$query"; - - return "\n"; -} - -function format_warning($msg, $id = "") { - return "

$msg

"; -} - -function format_notice($msg, $id = "") { - return "

$msg

"; -} - -function format_error($msg, $id = "") { - return "

$msg

"; -} - -function print_notice($msg) { - return print format_notice($msg); -} - -function print_warning($msg) { - return print format_warning($msg); -} - -function print_error($msg) { - return print format_error($msg); -} - -function print_label_select($name, $value, $attributes = "") { - - $pdo = Db::pdo(); - - $sth = $pdo->prepare("SELECT caption FROM ttrss_labels2 - WHERE owner_uid = ? ORDER BY caption"); - $sth->execute([$_SESSION['uid']]); - - print ""; - - -} diff --git a/include/controls_compat.php b/include/controls_compat.php new file mode 100644 index 000000000..3d2779b08 --- /dev/null +++ b/include/controls_compat.php @@ -0,0 +1,312 @@ +"; + foreach ($values as $v) { + if ($v == $default) + $sel = "selected=\"1\""; + else + $sel = ""; + + $v = trim($v); + + print ""; + } + print ""; +} + +function print_select_hash($id, $default, $values, $attributes = "", $name = "") { + if (!$name) $name = $id; + + print ""; +} + +function format_hidden($name, $value) { + return ""; +} + +function print_hidden($name, $value) { + print format_hidden($name, $value); +} + +function format_checkbox($id, $checked, $value = "", $attributes = "") { + $checked_str = $checked ? "checked" : ""; + $value_str = $value ? "value=\"$value\"" : ""; + + return ""; +} + +function print_checkbox($id, $checked, $value = "", $attributes = "") { + print format_checkbox($id, $checked, $value, $attributes); +} + +function format_button($type, $value, $attributes = "") { + return ""; +} + +function print_button($type, $value, $attributes = "") { + print format_button($type, $value, $attributes); +} + +function print_feed_multi_select($id, $default_ids = [], + $attributes = "", $include_all_feeds = true, + $root_id = null, $nest_level = 0) { + + $pdo = Db::pdo(); + + print_r(in_array("CAT:6",$default_ids)); + + if (!$root_id) { + print ""; + } +} + +function print_feed_cat_select($id, $default_id, $attributes, $include_all_cats = true, + $root_id = null, $nest_level = 0) { + + print format_feed_cat_select($id, $default_id, $attributes, $include_all_cats, $root_id, $nest_level); +} + +function format_feed_cat_select($id, $default_id, $attributes, $include_all_cats = true, + $root_id = null, $nest_level = 0) { + + $ret = ""; + + if (!$root_id) { + $ret .= ""; + } + + return $ret; +} + +function stylesheet_tag($filename, $id = false) { + $timestamp = filemtime($filename); + + $id_part = $id ? "id=\"$id\"" : ""; + + return "\n"; +} + +function javascript_tag($filename) { + $query = ""; + + if (!(strpos($filename, "?") === false)) { + $query = substr($filename, strpos($filename, "?")+1); + $filename = substr($filename, 0, strpos($filename, "?")); + } + + $timestamp = filemtime($filename); + + if ($query) $timestamp .= "&$query"; + + return "\n"; +} + +function format_warning($msg, $id = "") { + return "

$msg

"; +} + +function format_notice($msg, $id = "") { + return "

$msg

"; +} + +function format_error($msg, $id = "") { + return "

$msg

"; +} + +function print_notice($msg) { + return print format_notice($msg); +} + +function print_warning($msg) { + return print format_warning($msg); +} + +function print_error($msg) { + return print format_error($msg); +} + +function print_label_select($name, $value, $attributes = "") { + + $pdo = Db::pdo(); + + $sth = $pdo->prepare("SELECT caption FROM ttrss_labels2 + WHERE owner_uid = ? ORDER BY caption"); + $sth->execute([$_SESSION['uid']]); + + print ""; + + +} diff --git a/include/functions.php b/include/functions.php index 4557c0411..174ef39f0 100644 --- a/include/functions.php +++ b/include/functions.php @@ -203,6 +203,7 @@ require_once 'db-prefs.php'; require_once 'controls.php'; + require_once 'controls_compat.php'; define('SELF_USER_AGENT', 'Tiny Tiny RSS/' . get_version() . ' (http://tt-rss.org/)'); ini_set('user_agent', SELF_USER_AGENT); diff --git a/include/login_form.php b/include/login_form.php index aa6a72260..798efa624 100755 --- a/include/login_form.php +++ b/include/login_form.php @@ -97,7 +97,7 @@

- + diff --git a/plugins/mail/init.php b/plugins/mail/init.php index 829620ebc..b1263ece5 100644 --- a/plugins/mail/init.php +++ b/plugins/mail/init.php @@ -160,7 +160,7 @@ class Mail extends Plugin { style=\"width : 30em;\" name=\"destination\" id=\"emailArticleDlg_destination\">"; */ - print_select("destination", "", $addresslist, 'style="width: 30em" dojoType="dijit.form.ComboBox"'); + print \Controls\select_tag("destination", "", $addresslist, 'style="width: 30em" dojoType="dijit.form.ComboBox"'); /* print "

"; */ -- cgit v1.2.3-54-g00ecf From af4b3e7df06e50e956e9fda281935a7483f5673a Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Tue, 16 Feb 2021 15:05:32 +0300 Subject: login form: use control helpers --- include/controls.php | 4 ++-- include/login_form.php | 15 ++++++++------- 2 files changed, 10 insertions(+), 9 deletions(-) (limited to 'include/login_form.php') diff --git a/include/controls.php b/include/controls.php index 78f02233f..b351a9449 100755 --- a/include/controls.php +++ b/include/controls.php @@ -64,12 +64,12 @@ name=\"".htmlspecialchars($name)."\" value=\"".htmlspecialchars($value)."\">"; } - function checkbox_tag(string $name, bool $checked, string $value = "", string $attributes = "", string $id = "") { + function checkbox_tag(string $name, bool $checked = false, string $value = "", string $attributes = "", string $id = "") { $is_checked = $checked ? "checked" : ""; $value_str = $value ? "value=\"".htmlspecialchars($value)."\"" : ""; return ""; + $value_str $is_checked $attributes id=\"".htmlspecialchars($id)."\">"; } function select_feeds_cats(string $name, int $default_id = null, string $attributes = "", diff --git a/include/login_form.php b/include/login_form.php index 798efa624..e4eb52a51 100755 --- a/include/login_form.php +++ b/include/login_form.php @@ -141,8 +141,8 @@

- + +

@@ -153,9 +153,10 @@

- - + + + +

@@ -166,7 +167,7 @@

- +

@@ -177,7 +178,7 @@

- +

-- cgit v1.2.3-54-g00ecf From bdbbdbb0eddd125bec167da5f42bbd95c770151f Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Tue, 16 Feb 2021 16:59:21 +0300 Subject: rework controls to accept parameters as array --- classes/feeds.php | 2 +- classes/pref/feeds.php | 15 +++++++-------- classes/pref/filters.php | 8 ++++---- classes/pref/prefs.php | 4 ++-- classes/pref/system.php | 2 +- include/controls.php | 47 ++++++++++++++++++++++++++++++----------------- include/login_form.php | 3 ++- plugins/mail/init.php | 3 ++- 8 files changed, 49 insertions(+), 35 deletions(-) (limited to 'include/login_form.php') diff --git a/classes/feeds.php b/classes/feeds.php index 4e6fdbaf8..43c8bf584 100755 --- a/classes/feeds.php +++ b/classes/feeds.php @@ -608,7 +608,7 @@ class Feeds extends Handler_Protected { print "

"; print "" . __("Language:") . ""; print \Controls\select_tag("search_language", get_pref('DEFAULT_SEARCH_LANGUAGE'), Pref_Feeds::get_ts_languages(), - "title=\"".__('Used for word stemming')."\""); + ["title" => __('Used for word stemming')]); print "

"; } diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php index 636f2d69b..ce2d321bd 100755 --- a/classes/pref/feeds.php +++ b/classes/pref/feeds.php @@ -644,8 +644,10 @@ class Pref_Feeds extends Handler_Protected { $local_purge_intervals = [ T_nsprintf('%d day', '%d days', $purge_interval, $purge_interval) ]; } - print \Controls\select_hash("purge_interval", $purge_interval, $local_purge_intervals, - ((FORCE_ARTICLE_PURGE == 0) ? "" : 'disabled="1"')); + print \Controls\select_hash("purge_interval", + $purge_interval, + $local_purge_intervals, + (FORCE_ARTICLE_PURGE == 0) ? [] : ["disabled" => 1]); print ""; @@ -815,8 +817,6 @@ class Pref_Feeds extends Handler_Protected { print_notice("Enable the options you wish to apply using checkboxes on the right:"); - print "

"; - print \Controls\hidden_tag("ids", "$feed_ids"); print \Controls\hidden_tag("op", "pref-feeds"); print \Controls\hidden_tag("method", "batchEditSave"); @@ -846,8 +846,7 @@ class Pref_Feeds extends Handler_Protected { print "

"; print "" . __('Language:') . " "; - print \Controls\select_tag("feed_language", "", $this::get_ts_languages(), - 'disabled="1"'); + print \Controls\select_tag("feed_language", "", $this::get_ts_languages(), ["disabled"=> 1]); $this->batch_edit_cbox("feed_language"); @@ -868,7 +867,7 @@ class Pref_Feeds extends Handler_Protected { $local_update_intervals = $update_intervals; $local_update_intervals[0] .= sprintf(" (%s)", $update_intervals[get_pref("DEFAULT_UPDATE_INTERVAL")]); - print \Controls\select_hash("update_interval", "", $local_update_intervals, 'disabled="1"'); + print \Controls\select_hash("update_interval", "", $local_update_intervals, ["disabled" => 1]); $this->batch_edit_cbox("update_interval"); @@ -890,7 +889,7 @@ class Pref_Feeds extends Handler_Protected { else $local_purge_intervals[0] .= " " . sprintf("(%s)", __("Disabled")); - print \Controls\select_hash("purge_interval", "", $local_purge_intervals, 'disabled="1"'); + print \Controls\select_hash("purge_interval", "", $local_purge_intervals, ["disabled" => 1]); $this->batch_edit_cbox("purge_interval"); diff --git a/classes/pref/filters.php b/classes/pref/filters.php index caefb1ea7..e9c58cc3e 100755 --- a/classes/pref/filters.php +++ b/classes/pref/filters.php @@ -894,7 +894,7 @@ class Pref_Filters extends Handler_Protected { dojoType='fox.form.Select'");*/ print \Controls\select_labels("action_param_label", $action_param, - "style=\"$label_param_hidden\"", + ["style" => $label_param_hidden], "filterDlg_actionParamLabel"); $filter_actions = PluginHost::getInstance()->get_filter_actions(); @@ -909,16 +909,16 @@ class Pref_Filters extends Handler_Protected { } if (count($filter_action_hash) == 0) { - $filter_plugin_disabled = "disabled"; + $filter_plugin_disabled = ["disabled" => "1"]; $filter_action_hash["no-data"] = __("No actions available"); } else { - $filter_plugin_disabled = ""; + $filter_plugin_disabled = []; } print \Controls\select_hash("action_param_plugin", $action_param, $filter_action_hash, - "style=\"$plugin_param_hidden\" $filter_plugin_disabled", + array_merge(["style" => $plugin_param_hidden], $filter_plugin_disabled), "filterDlg_actionParamPlugin"); print ""; diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php index d8491995d..3bc8a9a9c 100644 --- a/classes/pref/prefs.php +++ b/classes/pref/prefs.php @@ -664,13 +664,13 @@ class Pref_Prefs extends Handler_Protected { if ($pref_name == "USER_LANGUAGE") { print \Controls\select_hash($pref_name, $value, get_translations(), - "style='width : 220px; margin : 0px'"); + ["style" => 'width : 220px; margin : 0px']); } else if ($pref_name == "USER_TIMEZONE") { $timezones = explode("\n", file_get_contents("lib/timezones.txt")); - print \Controls\select_tag($pref_name, $value, $timezones, 'dojoType="dijit.form.FilteringSelect"'); + print \Controls\select_tag($pref_name, $value, $timezones, ["dojoType" => "dijit.form.FilteringSelect"]); } else if ($pref_name == "BLACKLISTED_TAGS") { # TODO: other possible

prefs go here
 
diff --git a/classes/pref/system.php b/classes/pref/system.php
index d3b733364..a4a072ea9 100644
--- a/classes/pref/system.php
+++ b/classes/pref/system.php
@@ -95,7 +95,7 @@ class Pref_System extends Handler_Administrative {
 							E_USER_ERROR => __("Errors"),
 							E_USER_WARNING => __("Warnings"),
 							E_USER_NOTICE => __("Everything")
-						], 'onchange="Helpers.EventLog.refresh()"', "severity") ?>
+						], ["onchange"=> "Helpers.EventLog.refresh()"], "severity") ?>
 				</div>
 			</div>
 
diff --git a/include/controls.php b/include/controls.php
index b351a9449..78ff75572 100755
--- a/include/controls.php
+++ b/include/controls.php
@@ -1,19 +1,30 @@
 <?php
    namespace Controls;
 
-   function button_tag(string $value, string $type, $attributes = "") {
-      return "<button dojoType=\"dijit.form.Button\" $attributes type=\"$type\">".htmlspecialchars($value)."</button>";
+   function attributes_to_string(array $attributes) {
+      $rv = "";
+
+      foreach ($attributes as $k => $v) {
+         $rv .= "$k=\"" . htmlspecialchars($v) . "\"";
+      }
+
+      return $rv;
+   }
+
+   function button_tag(string $value, string $type, array $attributes = []) {
+      return "<button dojoType=\"dijit.form.Button\" ".attributes_to_string($attributes)." type=\"$type\">".htmlspecialchars($value)."</button>";
    }
 
-   function submit_tag(string $value, $attributes = "") {
-      return button_tag($value, "submit", "class=\"alt-primary\" $attributes");
+   function submit_tag(string $value, array $attributes = []) {
+      return button_tag($value, "submit", array_merge(["class" => "alt-primary"], $attributes));
    }
 
-   function select_tag(string $name, $value, array $values, string $attributes = "", string $id = "") {
-      $dojo_type = strpos($attributes, "dojoType") === false ? "dojoType='fox.form.Select'" : "";
+   function select_tag(string $name, $value, array $values, array $attributes = [], string $id = "") {
+      $attributes_str = attributes_to_string($attributes);
+      $dojo_type = strpos($attributes_str, "dojoType") === false ? "dojoType='fox.form.Select'" : "";
 
       $rv = "<select $dojo_type name=\"".htmlspecialchars($name)."\"
-         id=\"".htmlspecialchars($id)."\" name=\"".htmlspecialchars($name)."\" $attributes>";
+         id=\"".htmlspecialchars($id)."\" name=\"".htmlspecialchars($name)."\" $attributes_str>";
 
       foreach ($values as $v) {
          $is_sel = ($v == $value) ? "selected=\"selected\"" : "";
@@ -26,7 +37,7 @@
       return $rv;
    }
 
-   function select_labels(string $name, string $value, string $attributes = "", string $id = "") {
+   function select_labels(string $name, string $value, array $attributes = [], string $id = "") {
       $pdo = \Db::pdo();
 
       $sth = $pdo->prepare("SELECT caption FROM ttrss_labels2
@@ -42,11 +53,12 @@
       return select_tag($name, $value, $values, $attributes, $id);
    }
 
-   function select_hash(string $name, $value, array $values, string $attributes = "", string $id = "") {
-      $dojo_type = strpos($attributes, "dojoType") === false ? "dojoType='fox.form.Select'" : "";
+   function select_hash(string $name, $value, array $values, array $attributes = [], string $id = "") {
+      $attributes_str = attributes_to_string($attributes);
+      $dojo_type = strpos($attributes_str, "dojoType") === false ? "dojoType='fox.form.Select'" : "";
 
       $rv = "<select $dojo_type name=\"".htmlspecialchars($name)."\"
-         id=\"".htmlspecialchars($id)."\" name=\"".htmlspecialchars($name)."\" $attributes>";
+         id=\"".htmlspecialchars($id)."\" name=\"".htmlspecialchars($name)."\" $attributes_str>";
 
       foreach ($values as $k => $v) {
          $is_sel = ($k == $value) ? "selected=\"selected\"" : "";
@@ -59,20 +71,21 @@
       return $rv;
    }
 
-   function hidden_tag(string $name, string $value) {
+   function hidden_tag(string $name, string $value, array $attributes = []) {
       return "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\"
-         name=\"".htmlspecialchars($name)."\" value=\"".htmlspecialchars($value)."\">";
+               ".attributes_to_string($attributes)." name=\"".htmlspecialchars($name)."\"
+               value=\"".htmlspecialchars($value)."\">";
    }
 
-   function checkbox_tag(string $name, bool $checked = false, string $value = "", string $attributes = "", string $id = "") {
+   function checkbox_tag(string $name, bool $checked = false, string $value = "", array $attributes = [], string $id = "") {
       $is_checked = $checked ? "checked" : "";
       $value_str = $value ? "value=\"".htmlspecialchars($value)."\"" : "";
 
       return "<input dojoType='dijit.form.CheckBox' name=\"".htmlspecialchars($name)."\"
-                  $value_str $is_checked $attributes id=\"".htmlspecialchars($id)."\">";
+                  $value_str $is_checked ".attributes_to_string($attributes)." id=\"".htmlspecialchars($id)."\">";
    }
 
-   function select_feeds_cats(string $name, int $default_id = null, string $attributes = "",
+   function select_feeds_cats(string $name, int $default_id = null, array $attributes = [],
                   bool $include_all_cats = true, string $root_id = null, int $nest_level = 0, string $id = "") {
 
       $ret = "";
@@ -81,7 +94,7 @@
          $ret .= "<select name=\"".htmlspecialchars($name)."\"
                         id=\"".htmlspecialchars($id)."\"
                         default=\"".((string)$default_id)."\"
-                        dojoType=\"fox.form.Select\" $attributes>";
+                        dojoType=\"fox.form.Select\" ".attributes_to_string($attributes).">";
       }
 
       $pdo = \Db::pdo();
diff --git a/include/login_form.php b/include/login_form.php
index e4eb52a51..c3660bced 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -142,7 +142,8 @@
 				<label> </label>
 
 				<label id="bw_limit_label">
-					<?= \Controls\checkbox_tag("safe_mode", false, "", "onchange='UtilityApp.bwLimitChange(this)'", 'bw_limit') ?>
+					<?= \Controls\checkbox_tag("bw_limit", false, "",
+									["onchange" => 'UtilityApp.bwLimitChange(this)'], 'bw_limit') ?>
 					<?= __("Use less traffic") ?></label>
 			</fieldset>
 
diff --git a/plugins/mail/init.php b/plugins/mail/init.php
index ffd0397e0..c054196df 100644
--- a/plugins/mail/init.php
+++ b/plugins/mail/init.php
@@ -160,7 +160,8 @@ class Mail extends Plugin {
 				style=\"width : 30em;\"
 				name=\"destination\" id=\"emailArticleDlg_destination\">"; */
 
-		print \Controls\select_tag("destination", "", $addresslist, 'style="width: 30em" dojoType="dijit.form.ComboBox"');
+		print \Controls\select_tag("destination", "", $addresslist,
+									["style" => "width: 30em", "dojoType" => "dijit.form.ComboBox"]);
 
 /*		print "<div class=\"autocomplete\" id=\"emailArticleDlg_dst_choices\"
 	style=\"z-index: 30; display : none\"></div>"; */
-- 
cgit v1.2.3-54-g00ecf

From c088e9d9d8296fe154763da3b5297bf85c3cc3a1 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Thu, 18 Feb 2021 22:23:06 +0300
Subject: get rid of a few more prototype-isms

(limited to 'include/login_form.php')

diff --git a/classes/feeds.php b/classes/feeds.php
index 30478ae39..04553451c 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -640,7 +640,6 @@ class Feeds extends Handler_Protected {
 				};
 			</script>
 			<?php
-				echo javascript_tag("lib/prototype.js");
 				echo javascript_tag("js/utility.js");
 				echo javascript_tag("lib/dojo/dojo.js");
 				echo javascript_tag("lib/dojo/tt-rss-layer.js");
diff --git a/classes/handler/public.php b/classes/handler/public.php
index 80c1c271d..de3165e2f 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -358,7 +358,6 @@ class Handler_Public extends Handler {
 		<head>
 			<title><?= __("Share with Tiny Tiny RSS") ?></title>
 			<?php
-			echo javascript_tag("lib/prototype.js");
 			echo javascript_tag("lib/dojo/dojo.js");
 			echo javascript_tag("js/utility.js");
 			echo javascript_tag("lib/dojo/tt-rss-layer.js");
@@ -583,7 +582,6 @@ class Handler_Public extends Handler {
 			<head>
 				<title>Tiny Tiny RSS</title>
 				<?php
-					echo javascript_tag("lib/prototype.js");
 					echo javascript_tag("js/utility.js");
 					echo javascript_tag("lib/dojo/dojo.js");
 					echo javascript_tag("lib/dojo/tt-rss-layer.js");
@@ -743,7 +741,6 @@ class Handler_Public extends Handler {
 			<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
 			<?php
 				echo stylesheet_tag("themes/light.css");
-				echo javascript_tag("lib/prototype.js");
 				echo javascript_tag("lib/dojo/dojo.js");
 				echo javascript_tag("lib/dojo/tt-rss-layer.js");
 			?>
@@ -946,7 +943,6 @@ class Handler_Public extends Handler {
 			<link rel="icon" type="image/png" sizes="72x72" href="images/favicon-72px.png">
 			<?php
 				echo stylesheet_tag("themes/light.css");
-				echo javascript_tag("lib/prototype.js");
 				echo javascript_tag("lib/dojo/dojo.js");
 				echo javascript_tag("lib/dojo/tt-rss-layer.js");
 			?>
diff --git a/include/login_form.php b/include/login_form.php
index c3660bced..d1af23459 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -6,10 +6,8 @@
 	<link rel="shortcut icon" type="image/png" href="images/favicon.png">
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 	<?php
-	foreach (array("lib/prototype.js",
-				"lib/dojo/dojo.js",
+	foreach (array("lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
-				"lib/prototype.js",
 			 	"js/common.js",
 				"js/utility.js",
 				"errors.php?mode=js") as $jsfile) {
@@ -67,7 +65,7 @@
 
                         profile.removeOption(profile.getOptions());
 
-                        reply.each((p) => {
+                        reply.forEach((p) => {
                             profile
                                 .attr("disabled", false)
                                 .addOption(p);
diff --git a/index.php b/index.php
index 4a4d336ca..4494082dd 100644
--- a/index.php
+++ b/index.php
@@ -76,8 +76,7 @@
 	</script>
 
 	<?php
-	foreach (array(#"lib/_prototype.js",
-				"lib/dojo/dojo.js",
+	foreach (array("lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
 				"js/tt-rss.js",
 				"js/common.js",
diff --git a/js/utility.js b/js/utility.js
index a7530a97f..43ad5644e 100644
--- a/js/utility.js
+++ b/js/utility.js
@@ -16,10 +16,10 @@ window.addEventListener("load", function() {
         setup_night_mode: function() {
             const mql = window.matchMedia('(prefers-color-scheme: dark)');
 
-            const link = new Element("link", {
-                rel: "stylesheet",
-                id: "theme_auto_css"
-            });
+            const link = document.createElement("link");
+
+            link.rel = "stylesheet";
+            link.id = "theme_auto_css";
 
             link.onload = function() {
                 document.querySelector("body").removeClassName("css_loading");
diff --git a/lib/prototype.js b/lib/prototype.js
deleted file mode 100644
index d9bbc6e80..000000000
--- a/lib/prototype.js
+++ /dev/null
@@ -1,7590 +0,0 @@
-// Modified document.on() to modified.p_on() to fix compatibility with Dojo -fox
-
-/*  Prototype JavaScript framework, version 1.7.3
- *  (c) 2005-2010 Sam Stephenson
- *
- *  Prototype is freely distributable under the terms of an MIT-style license.
- *  For details, see the Prototype web site: http://www.prototypejs.org/
- *
- *--------------------------------------------------------------------------*/
-
-var Prototype = {
-
-  Version: '1.7.3',
-
-  Browser: (function(){
-    var ua = navigator.userAgent;
-    var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
-    return {
-      IE:             !!window.attachEvent && !isOpera,
-      Opera:          isOpera,
-      WebKit:         ua.indexOf('AppleWebKit/') > -1,
-      Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
-      MobileSafari:   /Apple.*Mobile/.test(ua)
-    }
-  })(),
-
-  BrowserFeatures: {
-    XPath: !!document.evaluate,
-
-    SelectorsAPI: !!document.querySelector,
-
-    ElementExtensions: (function() {
-      var constructor = window.Element || window.HTMLElement;
-      return !!(constructor && constructor.prototype);
-    })(),
-    SpecificElementExtensions: (function() {
-      if (typeof window.HTMLDivElement !== 'undefined')
-        return true;
-
-      var div = document.createElement('div'),
-          form = document.createElement('form'),
-          isSupported = false;
-
-      if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
-        isSupported = true;
-      }
-
-      div = form = null;
-
-      return isSupported;
-    })()
-  },
-
-  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script\\s*>',
-  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
-
-  emptyFunction: function() { },
-
-  K: function(x) { return x }
-};
-
-if (Prototype.Browser.MobileSafari)
-  Prototype.BrowserFeatures.SpecificElementExtensions = false;
-/* Based on Alex Arnell's inheritance implementation. */
-
-var Class = (function() {
-
-  var IS_DONTENUM_BUGGY = (function(){
-    for (var p in { toString: 1 }) {
-      if (p === 'toString') return false;
-    }
-    return true;
-  })();
-
-  function subclass() {};
-  function create() {
-    var parent = null, properties = $A(arguments);
-    if (Object.isFunction(properties[0]))
-      parent = properties.shift();
-
-    function klass() {
-      this.initialize.apply(this, arguments);
-    }
-
-    Object.extend(klass, Class.Methods);
-    klass.superclass = parent;
-    klass.subclasses = [];
-
-    if (parent) {
-      subclass.prototype = parent.prototype;
-      klass.prototype = new subclass;
-      parent.subclasses.push(klass);
-    }
-
-    for (var i = 0, length = properties.length; i < length; i++)
-      klass.addMethods(properties[i]);
-
-    if (!klass.prototype.initialize)
-      klass.prototype.initialize = Prototype.emptyFunction;
-
-    klass.prototype.constructor = klass;
-    return klass;
-  }
-
-  function addMethods(source) {
-    var ancestor   = this.superclass && this.superclass.prototype,
-        properties = Object.keys(source);
-
-    if (IS_DONTENUM_BUGGY) {
-      if (source.toString != Object.prototype.toString)
-        properties.push("toString");
-      if (source.valueOf != Object.prototype.valueOf)
-        properties.push("valueOf");
-    }
-
-    for (var i = 0, length = properties.length; i < length; i++) {
-      var property = properties[i], value = source[property];
-      if (ancestor && Object.isFunction(value) &&
-          value.argumentNames()[0] == "$super") {
-        var method = value;
-        value = (function(m) {
-          return function() { return ancestor[m].apply(this, arguments); };
-        })(property).wrap(method);
-
-        value.valueOf = (function(method) {
-          return function() { return method.valueOf.call(method); };
-        })(method);
-
-        value.toString = (function(method) {
-          return function() { return method.toString.call(method); };
-        })(method);
-      }
-      this.prototype[property] = value;
-    }
-
-    return this;
-  }
-
-  return {
-    create: create,
-    Methods: {
-      addMethods: addMethods
-    }
-  };
-})();
-(function() {
-
-  var _toString = Object.prototype.toString,
-      _hasOwnProperty = Object.prototype.hasOwnProperty,
-      NULL_TYPE = 'Null',
-      UNDEFINED_TYPE = 'Undefined',
-      BOOLEAN_TYPE = 'Boolean',
-      NUMBER_TYPE = 'Number',
-      STRING_TYPE = 'String',
-      OBJECT_TYPE = 'Object',
-      FUNCTION_CLASS = '[object Function]',
-      BOOLEAN_CLASS = '[object Boolean]',
-      NUMBER_CLASS = '[object Number]',
-      STRING_CLASS = '[object String]',
-      ARRAY_CLASS = '[object Array]',
-      DATE_CLASS = '[object Date]',
-      NATIVE_JSON_STRINGIFY_SUPPORT = window.JSON &&
-        typeof JSON.stringify === 'function' &&
-        JSON.stringify(0) === '0' &&
-        typeof JSON.stringify(Prototype.K) === 'undefined';
-
-
-
-  var DONT_ENUMS = ['toString', 'toLocaleString', 'valueOf',
-   'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'constructor'];
-
-  var IS_DONTENUM_BUGGY = (function(){
-    for (var p in { toString: 1 }) {
-      if (p === 'toString') return false;
-    }
-    return true;
-  })();
-
-  function Type(o) {
-    switch(o) {
-      case null: return NULL_TYPE;
-      case (void 0): return UNDEFINED_TYPE;
-    }
-    var type = typeof o;
-    switch(type) {
-      case 'boolean': return BOOLEAN_TYPE;
-      case 'number':  return NUMBER_TYPE;
-      case 'string':  return STRING_TYPE;
-    }
-    return OBJECT_TYPE;
-  }
-
-  function extend(destination, source) {
-    for (var property in source)
-      destination[property] = source[property];
-    return destination;
-  }
-
-  function inspect(object) {
-    try {
-      if (isUndefined(object)) return 'undefined';
-      if (object === null) return 'null';
-      return object.inspect ? object.inspect() : String(object);
-    } catch (e) {
-      if (e instanceof RangeError) return '...';
-      throw e;
-    }
-  }
-
-  function toJSON(value) {
-    return Str('', { '': value }, []);
-  }
-
-  function Str(key, holder, stack) {
-    var value = holder[key];
-    if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {
-      value = value.toJSON(key);
-    }
-
-    var _class = _toString.call(value);
-
-    switch (_class) {
-      case NUMBER_CLASS:
-      case BOOLEAN_CLASS:
-      case STRING_CLASS:
-        value = value.valueOf();
-    }
-
-    switch (value) {
-      case null: return 'null';
-      case true: return 'true';
-      case false: return 'false';
-    }
-
-    var type = typeof value;
-    switch (type) {
-      case 'string':
-        return value.inspect(true);
-      case 'number':
-        return isFinite(value) ? String(value) : 'null';
-      case 'object':
-
-        for (var i = 0, length = stack.length; i < length; i++) {
-          if (stack[i] === value) {
-            throw new TypeError("Cyclic reference to '" + value + "' in object");
-          }
-        }
-        stack.push(value);
-
-        var partial = [];
-        if (_class === ARRAY_CLASS) {
-          for (var i = 0, length = value.length; i < length; i++) {
-            var str = Str(i, value, stack);
-            partial.push(typeof str === 'undefined' ? 'null' : str);
-          }
-          partial = '[' + partial.join(',') + ']';
-        } else {
-          var keys = Object.keys(value);
-          for (var i = 0, length = keys.length; i < length; i++) {
-            var key = keys[i], str = Str(key, value, stack);
-            if (typeof str !== "undefined") {
-               partial.push(key.inspect(true)+ ':' + str);
-             }
-          }
-          partial = '{' + partial.join(',') + '}';
-        }
-        stack.pop();
-        return partial;
-    }
-  }
-
-  function stringify(object) {
-    return JSON.stringify(object);
-  }
-
-  function toQueryString(object) {
-    return $H(object).toQueryString();
-  }
-
-  function toHTML(object) {
-    return object && object.toHTML ? object.toHTML() : String.interpret(object);
-  }
-
-  function keys(object) {
-    if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
-    var results = [];
-    for (var property in object) {
-      if (_hasOwnProperty.call(object, property))
-        results.push(property);
-    }
-
-    if (IS_DONTENUM_BUGGY) {
-      for (var i = 0; property = DONT_ENUMS[i]; i++) {
-        if (_hasOwnProperty.call(object, property))
-          results.push(property);
-      }
-    }
-
-    return results;
-  }
-
-  function values(object) {
-    var results = [];
-    for (var property in object)
-      results.push(object[property]);
-    return results;
-  }
-
-  function clone(object) {
-    return extend({ }, object);
-  }
-
-  function isElement(object) {
-    return !!(object && object.nodeType == 1);
-  }
-
-  function isArray(object) {
-    return _toString.call(object) === ARRAY_CLASS;
-  }
-
-  var hasNativeIsArray = (typeof Array.isArray == 'function')
-    && Array.isArray([]) && !Array.isArray({});
-
-  if (hasNativeIsArray) {
-    isArray = Array.isArray;
-  }
-
-  function isHash(object) {
-    return object instanceof Hash;
-  }
-
-  function isFunction(object) {
-    return _toString.call(object) === FUNCTION_CLASS;
-  }
-
-  function isString(object) {
-    return _toString.call(object) === STRING_CLASS;
-  }
-
-  function isNumber(object) {
-    return _toString.call(object) === NUMBER_CLASS;
-  }
-
-  function isDate(object) {
-    return _toString.call(object) === DATE_CLASS;
-  }
-
-  function isUndefined(object) {
-    return typeof object === "undefined";
-  }
-
-  extend(Object, {
-    extend:        extend,
-    inspect:       inspect,
-    toJSON:        NATIVE_JSON_STRINGIFY_SUPPORT ? stringify : toJSON,
-    toQueryString: toQueryString,
-    toHTML:        toHTML,
-    keys:          Object.keys || keys,
-    values:        values,
-    clone:         clone,
-    isElement:     isElement,
-    isArray:       isArray,
-    isHash:        isHash,
-    isFunction:    isFunction,
-    isString:      isString,
-    isNumber:      isNumber,
-    isDate:        isDate,
-    isUndefined:   isUndefined
-  });
-})();
-Object.extend(Function.prototype, (function() {
-  var slice = Array.prototype.slice;
-
-  function update(array, args) {
-    var arrayLength = array.length, length = args.length;
-    while (length--) array[arrayLength + length] = args[length];
-    return array;
-  }
-
-  function merge(array, args) {
-    array = slice.call(array, 0);
-    return update(array, args);
-  }
-
-  function argumentNames() {
-    var names = this.toString().match(/^[\s$]*function[^(]*\(([^)]*)$/)[1]
-      .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
-      .replace(/\s+/g, '').split(',');
-    return names.length == 1 && !names[0] ? [] : names;
-  }
-
-
-  function bind(context) {
-    if (arguments.length < 2 && Object.isUndefined(arguments[0]))
-      return this;
-
-    if (!Object.isFunction(this))
-      throw new TypeError("The object is not callable.");
-
-    var nop = function() {};
-    var __method = this, args = slice.call(arguments, 1);
-
-    var bound = function() {
-      var a = merge(args, arguments);
-      var c = this instanceof bound ? this : context;
-      return __method.apply(c, a);
-    };
-
-    nop.prototype   = this.prototype;
-    bound.prototype = new nop();
-
-    return bound;
-  }
-
-  function bindAsEventListener(context) {
-    var __method = this, args = slice.call(arguments, 1);
-    return function(event) {
-      var a = update([event || window.event], args);
-      return __method.apply(context, a);
-    }
-  }
-
-  function curry() {
-    if (!arguments.length) return this;
-    var __method = this, args = slice.call(arguments, 0);
-    return function() {
-      var a = merge(args, arguments);
-      return __method.apply(this, a);
-    }
-  }
-
-  function delay(timeout) {
-    var __method = this, args = slice.call(arguments, 1);
-    timeout = timeout * 1000;
-    return window.setTimeout(function() {
-      return __method.apply(__method, args);
-    }, timeout);
-  }
-
-  function defer() {
-    var args = update([0.01], arguments);
-    return this.delay.apply(this, args);
-  }
-
-  function wrap(wrapper) {
-    var __method = this;
-    return function() {
-      var a = update([__method.bind(this)], arguments);
-      return wrapper.apply(this, a);
-    }
-  }
-
-  function methodize() {
-    if (this._methodized) return this._methodized;
-    var __method = this;
-    return this._methodized = function() {
-      var a = update([this], arguments);
-      return __method.apply(null, a);
-    };
-  }
-
-  var extensions = {
-    argumentNames:       argumentNames,
-    bindAsEventListener: bindAsEventListener,
-    curry:               curry,
-    delay:               delay,
-    defer:               defer,
-    wrap:                wrap,
-    methodize:           methodize
-  };
-
-  if (!Function.prototype.bind)
-    extensions.bind = bind;
-
-  return extensions;
-})());
-
-
-
-(function(proto) {
-
-
-  function toISOString() {
-    return this.getUTCFullYear() + '-' +
-      (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
-      this.getUTCDate().toPaddedString(2) + 'T' +
-      this.getUTCHours().toPaddedString(2) + ':' +
-      this.getUTCMinutes().toPaddedString(2) + ':' +
-      this.getUTCSeconds().toPaddedString(2) + 'Z';
-  }
-
-
-  function toJSON() {
-    return this.toISOString();
-  }
-
-  if (!proto.toISOString) proto.toISOString = toISOString;
-  if (!proto.toJSON) proto.toJSON = toJSON;
-
-})(Date.prototype);
-
-
-RegExp.prototype.match = RegExp.prototype.test;
-
-RegExp.escape = function(str) {
-  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
-};
-var PeriodicalExecuter = Class.create({
-  initialize: function(callback, frequency) {
-    this.callback = callback;
-    this.frequency = frequency;
-    this.currentlyExecuting = false;
-
-    this.registerCallback();
-  },
-
-  registerCallback: function() {
-    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
-  },
-
-  execute: function() {
-    this.callback(this);
-  },
-
-  stop: function() {
-    if (!this.timer) return;
-    clearInterval(this.timer);
-    this.timer = null;
-  },
-
-  onTimerEvent: function() {
-    if (!this.currentlyExecuting) {
-      try {
-        this.currentlyExecuting = true;
-        this.execute();
-        this.currentlyExecuting = false;
-      } catch(e) {
-        this.currentlyExecuting = false;
-        throw e;
-      }
-    }
-  }
-});
-Object.extend(String, {
-  interpret: function(value) {
-    return value == null ? '' : String(value);
-  },
-  specialChar: {
-    '\b': '\\b',
-    '\t': '\\t',
-    '\n': '\\n',
-    '\f': '\\f',
-    '\r': '\\r',
-    '\\': '\\\\'
-  }
-});
-
-Object.extend(String.prototype, (function() {
-  var NATIVE_JSON_PARSE_SUPPORT = window.JSON &&
-    typeof JSON.parse === 'function' &&
-    JSON.parse('{"test": true}').test;
-
-  function prepareReplacement(replacement) {
-    if (Object.isFunction(replacement)) return replacement;
-    var template = new Template(replacement);
-    return function(match) { return template.evaluate(match) };
-  }
-
-  function isNonEmptyRegExp(regexp) {
-    return regexp.source && regexp.source !== '(?:)';
-  }
-
-
-  function gsub(pattern, replacement) {
-    var result = '', source = this, match;
-    replacement = prepareReplacement(replacement);
-
-    if (Object.isString(pattern))
-      pattern = RegExp.escape(pattern);
-
-    if (!(pattern.length || isNonEmptyRegExp(pattern))) {
-      replacement = replacement('');
-      return replacement + source.split('').join(replacement) + replacement;
-    }
-
-    while (source.length > 0) {
-      match = source.match(pattern)
-      if (match && match[0].length > 0) {
-        result += source.slice(0, match.index);
-        result += String.interpret(replacement(match));
-        source  = source.slice(match.index + match[0].length);
-      } else {
-        result += source, source = '';
-      }
-    }
-    return result;
-  }
-
-  function sub(pattern, replacement, count) {
-    replacement = prepareReplacement(replacement);
-    count = Object.isUndefined(count) ? 1 : count;
-
-    return this.gsub(pattern, function(match) {
-      if (--count < 0) return match[0];
-      return replacement(match);
-    });
-  }
-
-  function scan(pattern, iterator) {
-    this.gsub(pattern, iterator);
-    return String(this);
-  }
-
-  function truncate(length, truncation) {
-    length = length || 30;
-    truncation = Object.isUndefined(truncation) ? '...' : truncation;
-    return this.length > length ?
-      this.slice(0, length - truncation.length) + truncation : String(this);
-  }
-
-  function strip() {
-    return this.replace(/^\s+/, '').replace(/\s+$/, '');
-  }
-
-  function stripTags() {
-    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?(\/)?>|<\/\w+>/gi, '');
-  }
-
-  function stripScripts() {
-    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
-  }
-
-  function extractScripts() {
-    var matchAll = new RegExp(Prototype.ScriptFragment, 'img'),
-        matchOne = new RegExp(Prototype.ScriptFragment, 'im');
-    return (this.match(matchAll) || []).map(function(scriptTag) {
-      return (scriptTag.match(matchOne) || ['', ''])[1];
-    });
-  }
-
-  function evalScripts() {
-    return this.extractScripts().map(function(script) { return eval(script); });
-  }
-
-  function escapeHTML() {
-    return this.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>');
-  }
-
-  function unescapeHTML() {
-    return this.stripTags().replace(/</g,'<').replace(/>/g,'>').replace(/&/g,'&');
-  }
-
-
-  function toQueryParams(separator) {
-    var match = this.strip().match(/([^?#]*)(#.*)?$/);
-    if (!match) return { };
-
-    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
-      if ((pair = pair.split('='))[0]) {
-        var key = decodeURIComponent(pair.shift()),
-            value = pair.length > 1 ? pair.join('=') : pair[0];
-
-        if (value != undefined) {
-          value = value.gsub('+', ' ');
-          value = decodeURIComponent(value);
-        }
-
-        if (key in hash) {
-          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
-          hash[key].push(value);
-        }
-        else hash[key] = value;
-      }
-      return hash;
-    });
-  }
-
-  function toArray() {
-    return this.split('');
-  }
-
-  function succ() {
-    return this.slice(0, this.length - 1) +
-      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
-  }
-
-  function times(count) {
-    return count < 1 ? '' : new Array(count + 1).join(this);
-  }
-
-  function camelize() {
-    return this.replace(/-+(.)?/g, function(match, chr) {
-      return chr ? chr.toUpperCase() : '';
-    });
-  }
-
-  function capitalize() {
-    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
-  }
-
-  function underscore() {
-    return this.replace(/::/g, '/')
-               .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')
-               .replace(/([a-z\d])([A-Z])/g, '$1_$2')
-               .replace(/-/g, '_')
-               .toLowerCase();
-  }
-
-  function dasherize() {
-    return this.replace(/_/g, '-');
-  }
-
-  function inspect(useDoubleQuotes) {
-    var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
-      if (character in String.specialChar) {
-        return String.specialChar[character];
-      }
-      return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
-    });
-    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
-    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
-  }
-
-  function unfilterJSON(filter) {
-    return this.replace(filter || Prototype.JSONFilter, '$1');
-  }
-
-  function isJSON() {
-    var str = this;
-    if (str.blank()) return false;
-    str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@');
-    str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
-    str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
-    return (/^[\],:{}\s]*$/).test(str);
-  }
-
-  function evalJSON(sanitize) {
-    var json = this.unfilterJSON(),
-        cx = /[\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff\u0000]/g;
-    if (cx.test(json)) {
-      json = json.replace(cx, function (a) {
-        return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
-      });
-    }
-    try {
-      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
-    } catch (e) { }
-    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
-  }
-
-  function parseJSON() {
-    var json = this.unfilterJSON();
-    return JSON.parse(json);
-  }
-
-  function include(pattern) {
-    return this.indexOf(pattern) > -1;
-  }
-
-  function startsWith(pattern, position) {
-    position = Object.isNumber(position) ? position : 0;
-    return this.lastIndexOf(pattern, position) === position;
-  }
-
-  function endsWith(pattern, position) {
-    pattern = String(pattern);
-    position = Object.isNumber(position) ? position : this.length;
-    if (position < 0) position = 0;
-    if (position > this.length) position = this.length;
-    var d = position - pattern.length;
-    return d >= 0 && this.indexOf(pattern, d) === d;
-  }
-
-  function empty() {
-    return this == '';
-  }
-
-  function blank() {
-    return /^\s*$/.test(this);
-  }
-
-  function interpolate(object, pattern) {
-    return new Template(this, pattern).evaluate(object);
-  }
-
-  return {
-    gsub:           gsub,
-    sub:            sub,
-    scan:           scan,
-    truncate:       truncate,
-    strip:          String.prototype.trim || strip,
-    stripTags:      stripTags,
-    stripScripts:   stripScripts,
-    extractScripts: extractScripts,
-    evalScripts:    evalScripts,
-    escapeHTML:     escapeHTML,
-    unescapeHTML:   unescapeHTML,
-    toQueryParams:  toQueryParams,
-    parseQuery:     toQueryParams,
-    toArray:        toArray,
-    succ:           succ,
-    times:          times,
-    camelize:       camelize,
-    capitalize:     capitalize,
-    underscore:     underscore,
-    dasherize:      dasherize,
-    inspect:        inspect,
-    unfilterJSON:   unfilterJSON,
-    isJSON:         isJSON,
-    evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,
-    include:        include,
-    startsWith:     String.prototype.startsWith || startsWith,
-    endsWith:       String.prototype.endsWith || endsWith,
-    empty:          empty,
-    blank:          blank,
-    interpolate:    interpolate
-  };
-})());
-
-var Template = Class.create({
-  initialize: function(template, pattern) {
-    this.template = template.toString();
-    this.pattern = pattern || Template.Pattern;
-  },
-
-  evaluate: function(object) {
-    if (object && Object.isFunction(object.toTemplateReplacements))
-      object = object.toTemplateReplacements();
-
-    return this.template.gsub(this.pattern, function(match) {
-      if (object == null) return (match[1] + '');
-
-      var before = match[1] || '';
-      if (before == '\\') return match[2];
-
-      var ctx = object, expr = match[3],
-          pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
-
-      match = pattern.exec(expr);
-      if (match == null) return before;
-
-      while (match != null) {
-        var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];
-        ctx = ctx[comp];
-        if (null == ctx || '' == match[3]) break;
-        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
-        match = pattern.exec(expr);
-      }
-
-      return before + String.interpret(ctx);
-    });
-  }
-});
-Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
-
-var $break = { };
-
-var Enumerable = (function() {
-  function each(iterator, context) {
-    try {
-      this._each(iterator, context);
-    } catch (e) {
-      if (e != $break) throw e;
-    }
-    return this;
-  }
-
-  function eachSlice(number, iterator, context) {
-    var index = -number, slices = [], array = this.toArray();
-    if (number < 1) return array;
-    while ((index += number) < array.length)
-      slices.push(array.slice(index, index+number));
-    return slices.collect(iterator, context);
-  }
-
-  function all(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var result = true;
-    this.each(function(value, index) {
-      result = result && !!iterator.call(context, value, index, this);
-      if (!result) throw $break;
-    }, this);
-    return result;
-  }
-
-  function any(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var result = false;
-    this.each(function(value, index) {
-      if (result = !!iterator.call(context, value, index, this))
-        throw $break;
-    }, this);
-    return result;
-  }
-
-  function collect(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var results = [];
-    this.each(function(value, index) {
-      results.push(iterator.call(context, value, index, this));
-    }, this);
-    return results;
-  }
-
-  function detect(iterator, context) {
-    var result;
-    this.each(function(value, index) {
-      if (iterator.call(context, value, index, this)) {
-        result = value;
-        throw $break;
-      }
-    }, this);
-    return result;
-  }
-
-  function findAll(iterator, context) {
-    var results = [];
-    this.each(function(value, index) {
-      if (iterator.call(context, value, index, this))
-        results.push(value);
-    }, this);
-    return results;
-  }
-
-  function grep(filter, iterator, context) {
-    iterator = iterator || Prototype.K;
-    var results = [];
-
-    if (Object.isString(filter))
-      filter = new RegExp(RegExp.escape(filter));
-
-    this.each(function(value, index) {
-      if (filter.match(value))
-        results.push(iterator.call(context, value, index, this));
-    }, this);
-    return results;
-  }
-
-  function include(object) {
-    if (Object.isFunction(this.indexOf) && this.indexOf(object) != -1)
-      return true;
-
-    var found = false;
-    this.each(function(value) {
-      if (value == object) {
-        found = true;
-        throw $break;
-      }
-    });
-    return found;
-  }
-
-  function inGroupsOf(number, fillWith) {
-    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
-    return this.eachSlice(number, function(slice) {
-      while(slice.length < number) slice.push(fillWith);
-      return slice;
-    });
-  }
-
-  function inject(memo, iterator, context) {
-    this.each(function(value, index) {
-      memo = iterator.call(context, memo, value, index, this);
-    }, this);
-    return memo;
-  }
-
-  function invoke(method) {
-    var args = $A(arguments).slice(1);
-    return this.map(function(value) {
-      return value[method].apply(value, args);
-    });
-  }
-
-  function max(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var result;
-    this.each(function(value, index) {
-      value = iterator.call(context, value, index, this);
-      if (result == null || value >= result)
-        result = value;
-    }, this);
-    return result;
-  }
-
-  function min(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var result;
-    this.each(function(value, index) {
-      value = iterator.call(context, value, index, this);
-      if (result == null || value < result)
-        result = value;
-    }, this);
-    return result;
-  }
-
-  function partition(iterator, context) {
-    iterator = iterator || Prototype.K;
-    var trues = [], falses = [];
-    this.each(function(value, index) {
-      (iterator.call(context, value, index, this) ?
-        trues : falses).push(value);
-    }, this);
-    return [trues, falses];
-  }
-
-  function pluck(property) {
-    var results = [];
-    this.each(function(value) {
-      results.push(value[property]);
-    });
-    return results;
-  }
-
-  function reject(iterator, context) {
-    var results = [];
-    this.each(function(value, index) {
-      if (!iterator.call(context, value, index, this))
-        results.push(value);
-    }, this);
-    return results;
-  }
-
-  function sortBy(iterator, context) {
-    return this.map(function(value, index) {
-      return {
-        value: value,
-        criteria: iterator.call(context, value, index, this)
-      };
-    }, this).sort(function(left, right) {
-      var a = left.criteria, b = right.criteria;
-      return a < b ? -1 : a > b ? 1 : 0;
-    }).pluck('value');
-  }
-
-  function toArray() {
-    return this.map();
-  }
-
-  function zip() {
-    var iterator = Prototype.K, args = $A(arguments);
-    if (Object.isFunction(args.last()))
-      iterator = args.pop();
-
-    var collections = [this].concat(args).map($A);
-    return this.map(function(value, index) {
-      return iterator(collections.pluck(index));
-    });
-  }
-
-  function size() {
-    return this.toArray().length;
-  }
-
-  function inspect() {
-    return '#<Enumerable:' + this.toArray().inspect() + '>';
-  }
-
-
-
-
-
-
-
-
-
-  return {
-    each:       each,
-    eachSlice:  eachSlice,
-    all:        all,
-    every:      all,
-    any:        any,
-    some:       any,
-    collect:    collect,
-    map:        collect,
-    detect:     detect,
-    findAll:    findAll,
-    select:     findAll,
-    filter:     findAll,
-    grep:       grep,
-    include:    include,
-    member:     include,
-    inGroupsOf: inGroupsOf,
-    inject:     inject,
-    invoke:     invoke,
-    max:        max,
-    min:        min,
-    partition:  partition,
-    pluck:      pluck,
-    reject:     reject,
-    sortBy:     sortBy,
-    toArray:    toArray,
-    entries:    toArray,
-    zip:        zip,
-    size:       size,
-    inspect:    inspect,
-    find:       detect
-  };
-})();
-
-function $A(iterable) {
-  if (!iterable) return [];
-  if ('toArray' in Object(iterable)) return iterable.toArray();
-  var length = iterable.length || 0, results = new Array(length);
-  while (length--) results[length] = iterable[length];
-  return results;
-}
-
-
-function $w(string) {
-  if (!Object.isString(string)) return [];
-  string = string.strip();
-  return string ? string.split(/\s+/) : [];
-}
-
-Array.from = $A;
-
-
-(function() {
-  var arrayProto = Array.prototype,
-      slice = arrayProto.slice,
-      _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available
-
-  function each(iterator, context) {
-    for (var i = 0, length = this.length >>> 0; i < length; i++) {
-      if (i in this) iterator.call(context, this[i], i, this);
-    }
-  }
-  if (!_each) _each = each;
-
-  function clear() {
-    this.length = 0;
-    return this;
-  }
-
-  function first() {
-    return this[0];
-  }
-
-  function last() {
-    return this[this.length - 1];
-  }
-
-  function compact() {
-    return this.select(function(value) {
-      return value != null;
-    });
-  }
-
-  function flatten() {
-    return this.inject([], function(array, value) {
-      if (Object.isArray(value))
-        return array.concat(value.flatten());
-      array.push(value);
-      return array;
-    });
-  }
-
-  function without() {
-    var values = slice.call(arguments, 0);
-    return this.select(function(value) {
-      return !values.include(value);
-    });
-  }
-
-  function reverse(inline) {
-    return (inline === false ? this.toArray() : this)._reverse();
-  }
-
-  function uniq(sorted) {
-    return this.inject([], function(array, value, index) {
-      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
-        array.push(value);
-      return array;
-    });
-  }
-
-  function intersect(array) {
-    return this.uniq().findAll(function(item) {
-      return array.indexOf(item) !== -1;
-    });
-  }
-
-
-  function clone() {
-    return slice.call(this, 0);
-  }
-
-  function size() {
-    return this.length;
-  }
-
-  function inspect() {
-    return '[' + this.map(Object.inspect).join(', ') + ']';
-  }
-
-  function indexOf(item, i) {
-    if (this == null) throw new TypeError();
-
-    var array = Object(this), length = array.length >>> 0;
-    if (length === 0) return -1;
-
-    i = Number(i);
-    if (isNaN(i)) {
-      i = 0;
-    } else if (i !== 0 && isFinite(i)) {
-      i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
-    }
-
-    if (i > length) return -1;
-
-    var k = i >= 0 ? i : Math.max(length - Math.abs(i), 0);
-    for (; k < length; k++)
-      if (k in array && array[k] === item) return k;
-    return -1;
-  }
-
-
-  function lastIndexOf(item, i) {
-    if (this == null) throw new TypeError();
-
-    var array = Object(this), length = array.length >>> 0;
-    if (length === 0) return -1;
-
-    if (!Object.isUndefined(i)) {
-      i = Number(i);
-      if (isNaN(i)) {
-        i = 0;
-      } else if (i !== 0 && isFinite(i)) {
-        i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
-      }
-    } else {
-      i = length;
-    }
-
-    var k = i >= 0 ? Math.min(i, length - 1) :
-     length - Math.abs(i);
-
-    for (; k >= 0; k--)
-      if (k in array && array[k] === item) return k;
-    return -1;
-  }
-
-  function concat(_) {
-    var array = [], items = slice.call(arguments, 0), item, n = 0;
-    items.unshift(this);
-    for (var i = 0, length = items.length; i < length; i++) {
-      item = items[i];
-      if (Object.isArray(item) && !('callee' in item)) {
-        for (var j = 0, arrayLength = item.length; j < arrayLength; j++) {
-          if (j in item) array[n] = item[j];
-          n++;
-        }
-      } else {
-        array[n++] = item;
-      }
-    }
-    array.length = n;
-    return array;
-  }
-
-
-  function wrapNative(method) {
-    return function() {
-      if (arguments.length === 0) {
-        return method.call(this, Prototype.K);
-      } else if (arguments[0] === undefined) {
-        var args = slice.call(arguments, 1);
-        args.unshift(Prototype.K);
-        return method.apply(this, args);
-      } else {
-        return method.apply(this, arguments);
-      }
-    };
-  }
-
-
-  function map(iterator) {
-    if (this == null) throw new TypeError();
-    iterator = iterator || Prototype.K;
-
-    var object = Object(this);
-    var results = [], context = arguments[1], n = 0;
-
-    for (var i = 0, length = object.length >>> 0; i < length; i++) {
-      if (i in object) {
-        results[n] = iterator.call(context, object[i], i, object);
-      }
-      n++;
-    }
-    results.length = n;
-    return results;
-  }
-
-  if (arrayProto.map) {
-    map = wrapNative(Array.prototype.map);
-  }
-
-  function filter(iterator) {
-    if (this == null || !Object.isFunction(iterator))
-      throw new TypeError();
-
-    var object = Object(this);
-    var results = [], context = arguments[1], value;
-
-    for (var i = 0, length = object.length >>> 0; i < length; i++) {
-      if (i in object) {
-        value = object[i];
-        if (iterator.call(context, value, i, object)) {
-          results.push(value);
-        }
-      }
-    }
-    return results;
-  }
-
-  if (arrayProto.filter) {
-    filter = Array.prototype.filter;
-  }
-
-  function some(iterator) {
-    if (this == null) throw new TypeError();
-    iterator = iterator || Prototype.K;
-    var context = arguments[1];
-
-    var object = Object(this);
-    for (var i = 0, length = object.length >>> 0; i < length; i++) {
-      if (i in object && iterator.call(context, object[i], i, object)) {
-        return true;
-      }
-    }
-
-    return false;
-  }
-
-  if (arrayProto.some) {
-    some = wrapNative(Array.prototype.some);
-  }
-
-  function every(iterator) {
-    if (this == null) throw new TypeError();
-    iterator = iterator || Prototype.K;
-    var context = arguments[1];
-
-    var object = Object(this);
-    for (var i = 0, length = object.length >>> 0; i < length; i++) {
-      if (i in object && !iterator.call(context, object[i], i, object)) {
-        return false;
-      }
-    }
-
-    return true;
-  }
-
-  if (arrayProto.every) {
-    every = wrapNative(Array.prototype.every);
-  }
-
-
-  Object.extend(arrayProto, Enumerable);
-
-  if (arrayProto.entries === Enumerable.entries) {
-    delete arrayProto.entries;
-  }
-
-  if (!arrayProto._reverse)
-    arrayProto._reverse = arrayProto.reverse;
-
-  Object.extend(arrayProto, {
-    _each:     _each,
-
-    map:       map,
-    collect:   map,
-    select:    filter,
-    filter:    filter,
-    findAll:   filter,
-    some:      some,
-    any:       some,
-    every:     every,
-    all:       every,
-
-    clear:     clear,
-    first:     first,
-    last:      last,
-    compact:   compact,
-    flatten:   flatten,
-    without:   without,
-    reverse:   reverse,
-    uniq:      uniq,
-    intersect: intersect,
-    clone:     clone,
-    toArray:   clone,
-    size:      size,
-    inspect:   inspect
-  });
-
-  var CONCAT_ARGUMENTS_BUGGY = (function() {
-    return [].concat(arguments)[0][0] !== 1;
-  })(1,2);
-
-  if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;
-
-  if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
-  if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
-})();
-function $H(object) {
-  return new Hash(object);
-};
-
-var Hash = Class.create(Enumerable, (function() {
-  function initialize(object) {
-    this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
-  }
-
-
-  function _each(iterator, context) {
-    var i = 0;
-    for (var key in this._object) {
-      var value = this._object[key], pair = [key, value];
-      pair.key = key;
-      pair.value = value;
-      iterator.call(context, pair, i);
-      i++;
-    }
-  }
-
-  function set(key, value) {
-    return this._object[key] = value;
-  }
-
-  function get(key) {
-    if (this._object[key] !== Object.prototype[key])
-      return this._object[key];
-  }
-
-  function unset(key) {
-    var value = this._object[key];
-    delete this._object[key];
-    return value;
-  }
-
-  function toObject() {
-    return Object.clone(this._object);
-  }
-
-
-
-  function keys() {
-    return this.pluck('key');
-  }
-
-  function values() {
-    return this.pluck('value');
-  }
-
-  function index(value) {
-    var match = this.detect(function(pair) {
-      return pair.value === value;
-    });
-    return match && match.key;
-  }
-
-  function merge(object) {
-    return this.clone().update(object);
-  }
-
-  function update(object) {
-    return new Hash(object).inject(this, function(result, pair) {
-      result.set(pair.key, pair.value);
-      return result;
-    });
-  }
-
-  function toQueryPair(key, value) {
-    if (Object.isUndefined(value)) return key;
-
-    value = String.interpret(value);
-
-    value = value.gsub(/(\r)?\n/, '\r\n');
-    value = encodeURIComponent(value);
-    value = value.gsub(/%20/, '+');
-    return key + '=' + value;
-  }
-
-  function toQueryString() {
-    return this.inject([], function(results, pair) {
-      var key = encodeURIComponent(pair.key), values = pair.value;
-
-      if (values && typeof values == 'object') {
-        if (Object.isArray(values)) {
-          var queryValues = [];
-          for (var i = 0, len = values.length, value; i < len; i++) {
-            value = values[i];
-            queryValues.push(toQueryPair(key, value));
-          }
-          return results.concat(queryValues);
-        }
-      } else results.push(toQueryPair(key, values));
-      return results;
-    }).join('&');
-  }
-
-  function inspect() {
-    return '#<Hash:{' + this.map(function(pair) {
-      return pair.map(Object.inspect).join(': ');
-    }).join(', ') + '}>';
-  }
-
-  function clone() {
-    return new Hash(this);
-  }
-
-  return {
-    initialize:             initialize,
-    _each:                  _each,
-    set:                    set,
-    get:                    get,
-    unset:                  unset,
-    toObject:               toObject,
-    toTemplateReplacements: toObject,
-    keys:                   keys,
-    values:                 values,
-    index:                  index,
-    merge:                  merge,
-    update:                 update,
-    toQueryString:          toQueryString,
-    inspect:                inspect,
-    toJSON:                 toObject,
-    clone:                  clone
-  };
-})());
-
-Hash.from = $H;
-Object.extend(Number.prototype, (function() {
-  function toColorPart() {
-    return this.toPaddedString(2, 16);
-  }
-
-  function succ() {
-    return this + 1;
-  }
-
-  function times(iterator, context) {
-    $R(0, this, true).each(iterator, context);
-    return this;
-  }
-
-  function toPaddedString(length, radix) {
-    var string = this.toString(radix || 10);
-    return '0'.times(length - string.length) + string;
-  }
-
-  function abs() {
-    return Math.abs(this);
-  }
-
-  function round() {
-    return Math.round(this);
-  }
-
-  function ceil() {
-    return Math.ceil(this);
-  }
-
-  function floor() {
-    return Math.floor(this);
-  }
-
-  return {
-    toColorPart:    toColorPart,
-    succ:           succ,
-    times:          times,
-    toPaddedString: toPaddedString,
-    abs:            abs,
-    round:          round,
-    ceil:           ceil,
-    floor:          floor
-  };
-})());
-
-function $R(start, end, exclusive) {
-  return new ObjectRange(start, end, exclusive);
-}
-
-var ObjectRange = Class.create(Enumerable, (function() {
-  function initialize(start, end, exclusive) {
-    this.start = start;
-    this.end = end;
-    this.exclusive = exclusive;
-  }
-
-  function _each(iterator, context) {
-    var value = this.start, i;
-    for (i = 0; this.include(value); i++) {
-      iterator.call(context, value, i);
-      value = value.succ();
-    }
-  }
-
-  function include(value) {
-    if (value < this.start)
-      return false;
-    if (this.exclusive)
-      return value < this.end;
-    return value <= this.end;
-  }
-
-  return {
-    initialize: initialize,
-    _each:      _each,
-    include:    include
-  };
-})());
-
-
-
-var Abstract = { };
-
-
-var Try = {
-  these: function() {
-    var returnValue;
-
-    for (var i = 0, length = arguments.length; i < length; i++) {
-      var lambda = arguments[i];
-      try {
-        returnValue = lambda();
-        break;
-      } catch (e) { }
-    }
-
-    return returnValue;
-  }
-};
-
-var Ajax = {
-  getTransport: function() {
-    return Try.these(
-      function() {return new XMLHttpRequest()},
-      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
-      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
-    ) || false;
-  },
-
-  activeRequestCount: 0
-};
-
-Ajax.Responders = {
-  responders: [],
-
-  _each: function(iterator, context) {
-    this.responders._each(iterator, context);
-  },
-
-  register: function(responder) {
-    if (!this.include(responder))
-      this.responders.push(responder);
-  },
-
-  unregister: function(responder) {
-    this.responders = this.responders.without(responder);
-  },
-
-  dispatch: function(callback, request, transport, json) {
-    this.each(function(responder) {
-      if (Object.isFunction(responder[callback])) {
-        try {
-          responder[callback].apply(responder, [request, transport, json]);
-        } catch (e) { }
-      }
-    });
-  }
-};
-
-Object.extend(Ajax.Responders, Enumerable);
-
-Ajax.Responders.register({
-  onCreate:   function() { Ajax.activeRequestCount++ },
-  onComplete: function() { Ajax.activeRequestCount-- }
-});
-Ajax.Base = Class.create({
-  initialize: function(options) {
-    this.options = {
-      method:       'post',
-      asynchronous: true,
-      contentType:  'application/x-www-form-urlencoded',
-      encoding:     'UTF-8',
-      parameters:   '',
-      evalJSON:     true,
-      evalJS:       true
-    };
-    Object.extend(this.options, options || { });
-
-    this.options.method = this.options.method.toLowerCase();
-
-    if (Object.isHash(this.options.parameters))
-      this.options.parameters = this.options.parameters.toObject();
-  }
-});
-Ajax.Request = Class.create(Ajax.Base, {
-  _complete: false,
-
-  initialize: function($super, url, options) {
-    $super(options);
-    this.transport = Ajax.getTransport();
-    this.request(url);
-  },
-
-  request: function(url) {
-    this.url = url;
-    this.method = this.options.method;
-    var params = Object.isString(this.options.parameters) ?
-          this.options.parameters :
-          Object.toQueryString(this.options.parameters);
-
-    if (!['get', 'post'].include(this.method)) {
-      params += (params ? '&' : '') + "_method=" + this.method;
-      this.method = 'post';
-    }
-
-    if (params && this.method === 'get') {
-      this.url += (this.url.include('?') ? '&' : '?') + params;
-    }
-
-    this.parameters = params.toQueryParams();
-
-    try {
-      var response = new Ajax.Response(this);
-      if (this.options.onCreate) this.options.onCreate(response);
-      Ajax.Responders.dispatch('onCreate', this, response);
-
-      this.transport.open(this.method.toUpperCase(), this.url,
-        this.options.asynchronous);
-
-      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
-
-      this.transport.onreadystatechange = this.onStateChange.bind(this);
-      this.setRequestHeaders();
-
-      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
-      this.transport.send(this.body);
-
-      /* Force Firefox to handle ready state 4 for synchronous requests */
-      if (!this.options.asynchronous && this.transport.overrideMimeType)
-        this.onStateChange();
-
-    }
-    catch (e) {
-      this.dispatchException(e);
-    }
-  },
-
-  onStateChange: function() {
-    var readyState = this.transport.readyState;
-    if (readyState > 1 && !((readyState == 4) && this._complete))
-      this.respondToReadyState(this.transport.readyState);
-  },
-
-  setRequestHeaders: function() {
-    var headers = {
-      'X-Requested-With': 'XMLHttpRequest',
-      'X-Prototype-Version': Prototype.Version,
-      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
-    };
-
-    if (this.method == 'post') {
-      headers['Content-type'] = this.options.contentType +
-        (this.options.encoding ? '; charset=' + this.options.encoding : '');
-
-      /* Force "Connection: close" for older Mozilla browsers to work
-       * around a bug where XMLHttpRequest sends an incorrect
-       * Content-length header. See Mozilla Bugzilla #246651.
-       */
-      if (this.transport.overrideMimeType &&
-          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
-            headers['Connection'] = 'close';
-    }
-
-    if (typeof this.options.requestHeaders == 'object') {
-      var extras = this.options.requestHeaders;
-
-      if (Object.isFunction(extras.push))
-        for (var i = 0, length = extras.length; i < length; i += 2)
-          headers[extras[i]] = extras[i+1];
-      else
-        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
-    }
-
-    for (var name in headers)
-      if (headers[name] != null)
-        this.transport.setRequestHeader(name, headers[name]);
-  },
-
-  success: function() {
-    var status = this.getStatus();
-    return !status || (status >= 200 && status < 300) || status == 304;
-  },
-
-  getStatus: function() {
-    try {
-      if (this.transport.status === 1223) return 204;
-      return this.transport.status || 0;
-    } catch (e) { return 0 }
-  },
-
-  respondToReadyState: function(readyState) {
-    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
-
-    if (state == 'Complete') {
-      try {
-        this._complete = true;
-        (this.options['on' + response.status]
-         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
-         || Prototype.emptyFunction)(response, response.headerJSON);
-      } catch (e) {
-        this.dispatchException(e);
-      }
-
-      var contentType = response.getHeader('Content-type');
-      if (this.options.evalJS == 'force'
-          || (this.options.evalJS && this.isSameOrigin() && contentType
-          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
-        this.evalResponse();
-    }
-
-    try {
-      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
-      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
-    } catch (e) {
-      this.dispatchException(e);
-    }
-
-    if (state == 'Complete') {
-      this.transport.onreadystatechange = Prototype.emptyFunction;
-    }
-  },
-
-  isSameOrigin: function() {
-    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
-    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
-      protocol: location.protocol,
-      domain: document.domain,
-      port: location.port ? ':' + location.port : ''
-    }));
-  },
-
-  getHeader: function(name) {
-    try {
-      return this.transport.getResponseHeader(name) || null;
-    } catch (e) { return null; }
-  },
-
-  evalResponse: function() {
-    try {
-      return eval((this.transport.responseText || '').unfilterJSON());
-    } catch (e) {
-      this.dispatchException(e);
-    }
-  },
-
-  dispatchException: function(exception) {
-    (this.options.onException || Prototype.emptyFunction)(this, exception);
-    Ajax.Responders.dispatch('onException', this, exception);
-  }
-});
-
-Ajax.Request.Events =
-  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
-
-
-
-
-
-
-
-
-Ajax.Response = Class.create({
-  initialize: function(request){
-    this.request = request;
-    var transport  = this.transport  = request.transport,
-        readyState = this.readyState = transport.readyState;
-
-    if ((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
-      this.status       = this.getStatus();
-      this.statusText   = this.getStatusText();
-      this.responseText = String.interpret(transport.responseText);
-      this.headerJSON   = this._getHeaderJSON();
-    }
-
-    if (readyState == 4) {
-      var xml = transport.responseXML;
-      this.responseXML  = Object.isUndefined(xml) ? null : xml;
-      this.responseJSON = this._getResponseJSON();
-    }
-  },
-
-  status:      0,
-
-  statusText: '',
-
-  getStatus: Ajax.Request.prototype.getStatus,
-
-  getStatusText: function() {
-    try {
-      return this.transport.statusText || '';
-    } catch (e) { return '' }
-  },
-
-  getHeader: Ajax.Request.prototype.getHeader,
-
-  getAllHeaders: function() {
-    try {
-      return this.getAllResponseHeaders();
-    } catch (e) { return null }
-  },
-
-  getResponseHeader: function(name) {
-    return this.transport.getResponseHeader(name);
-  },
-
-  getAllResponseHeaders: function() {
-    return this.transport.getAllResponseHeaders();
-  },
-
-  _getHeaderJSON: function() {
-    var json = this.getHeader('X-JSON');
-    if (!json) return null;
-
-    try {
-      json = decodeURIComponent(escape(json));
-    } catch(e) {
-    }
-
-    try {
-      return json.evalJSON(this.request.options.sanitizeJSON ||
-        !this.request.isSameOrigin());
-    } catch (e) {
-      this.request.dispatchException(e);
-    }
-  },
-
-  _getResponseJSON: function() {
-    var options = this.request.options;
-    if (!options.evalJSON || (options.evalJSON != 'force' &&
-      !(this.getHeader('Content-type') || '').include('application/json')) ||
-        this.responseText.blank())
-          return null;
-    try {
-      return this.responseText.evalJSON(options.sanitizeJSON ||
-        !this.request.isSameOrigin());
-    } catch (e) {
-      this.request.dispatchException(e);
-    }
-  }
-});
-
-Ajax.Updater = Class.create(Ajax.Request, {
-  initialize: function($super, container, url, options) {
-    this.container = {
-      success: (container.success || container),
-      failure: (container.failure || (container.success ? null : container))
-    };
-
-    options = Object.clone(options);
-    var onComplete = options.onComplete;
-    options.onComplete = (function(response, json) {
-      this.updateContent(response.responseText);
-      if (Object.isFunction(onComplete)) onComplete(response, json);
-    }).bind(this);
-
-    $super(url, options);
-  },
-
-  updateContent: function(responseText) {
-    var receiver = this.container[this.success() ? 'success' : 'failure'],
-        options = this.options;
-
-    if (!options.evalScripts) responseText = responseText.stripScripts();
-
-    if (receiver = $(receiver)) {
-      if (options.insertion) {
-        if (Object.isString(options.insertion)) {
-          var insertion = { }; insertion[options.insertion] = responseText;
-          receiver.insert(insertion);
-        }
-        else options.insertion(receiver, responseText);
-      }
-      else receiver.update(responseText);
-    }
-  }
-});
-
-Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
-  initialize: function($super, container, url, options) {
-    $super(options);
-    this.onComplete = this.options.onComplete;
-
-    this.frequency = (this.options.frequency || 2);
-    this.decay = (this.options.decay || 1);
-
-    this.updater = { };
-    this.container = container;
-    this.url = url;
-
-    this.start();
-  },
-
-  start: function() {
-    this.options.onComplete = this.updateComplete.bind(this);
-    this.onTimerEvent();
-  },
-
-  stop: function() {
-    this.updater.options.onComplete = undefined;
-    clearTimeout(this.timer);
-    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
-  },
-
-  updateComplete: function(response) {
-    if (this.options.decay) {
-      this.decay = (response.responseText == this.lastText ?
-        this.decay * this.options.decay : 1);
-
-      this.lastText = response.responseText;
-    }
-    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
-  },
-
-  onTimerEvent: function() {
-    this.updater = new Ajax.Updater(this.container, this.url, this.options);
-  }
-});
-
-(function(GLOBAL) {
-
-  var UNDEFINED;
-  var SLICE = Array.prototype.slice;
-
-  var DIV = document.createElement('div');
-
-
-  function $(element) {
-    if (arguments.length > 1) {
-      for (var i = 0, elements = [], length = arguments.length; i < length; i++)
-        elements.push($(arguments[i]));
-      return elements;
-    }
-
-    if (Object.isString(element))
-      element = document.getElementById(element);
-    return Element.extend(element);
-  }
-
-  GLOBAL.$ = $;
-
-
-  if (!GLOBAL.Node) GLOBAL.Node = {};
-
-  if (!GLOBAL.Node.ELEMENT_NODE) {
-    Object.extend(GLOBAL.Node, {
-      ELEMENT_NODE:                1,
-      ATTRIBUTE_NODE:              2,
-      TEXT_NODE:                   3,
-      CDATA_SECTION_NODE:          4,
-      ENTITY_REFERENCE_NODE:       5,
-      ENTITY_NODE:                 6,
-      PROCESSING_INSTRUCTION_NODE: 7,
-      COMMENT_NODE:                8,
-      DOCUMENT_NODE:               9,
-      DOCUMENT_TYPE_NODE:         10,
-      DOCUMENT_FRAGMENT_NODE:     11,
-      NOTATION_NODE:              12
-    });
-  }
-
-  var ELEMENT_CACHE = {};
-
-  function shouldUseCreationCache(tagName, attributes) {
-    if (tagName === 'select') return false;
-    if ('type' in attributes) return false;
-    return true;
-  }
-
-  var HAS_EXTENDED_CREATE_ELEMENT_SYNTAX = (function(){
-    try {
-      var el = document.createElement('<input name="x">');
-      return el.tagName.toLowerCase() === 'input' && el.name === 'x';
-    }
-    catch(err) {
-      return false;
-    }
-  })();
-
-
-  var oldElement = GLOBAL.Element;
-  function Element(tagName, attributes) {
-    attributes = attributes || {};
-    tagName = tagName.toLowerCase();
-
-    if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {
-      tagName = '<' + tagName + ' name="' + attributes.name + '">';
-      delete attributes.name;
-      return Element.writeAttribute(document.createElement(tagName), attributes);
-    }
-
-    if (!ELEMENT_CACHE[tagName])
-      ELEMENT_CACHE[tagName] = Element.extend(document.createElement(tagName));
-
-    var node = shouldUseCreationCache(tagName, attributes) ?
-     ELEMENT_CACHE[tagName].cloneNode(false) : document.createElement(tagName);
-
-    return Element.writeAttribute(node, attributes);
-  }
-
-  GLOBAL.Element = Element;
-
-  Object.extend(GLOBAL.Element, oldElement || {});
-  if (oldElement) GLOBAL.Element.prototype = oldElement.prototype;
-
-  Element.Methods = { ByTag: {}, Simulated: {} };
-
-  var methods = {};
-
-  var INSPECT_ATTRIBUTES = { id: 'id', className: 'class' };
-  function inspect(element) {
-    element = $(element);
-    var result = '<' + element.tagName.toLowerCase();
-
-    var attribute, value;
-    for (var property in INSPECT_ATTRIBUTES) {
-      attribute = INSPECT_ATTRIBUTES[property];
-      value = (element[property] || '').toString();
-      if (value) result += ' ' + attribute + '=' + value.inspect(true);
-    }
-
-    return result + '>';
-  }
-
-  methods.inspect = inspect;
-
-
-  function visible(element) {
-    return $(element).getStyle('display') !== 'none';
-  }
-
-  function toggle(element, bool) {
-    element = $(element);
-    if (typeof bool !== 'boolean')
-      bool = !Element.visible(element);
-    Element[bool ? 'show' : 'hide'](element);
-
-    return element;
-  }
-
-  function hide(element) {
-    element = $(element);
-    element.style.display = 'none';
-    return element;
-  }
-
-  function show(element) {
-    element = $(element);
-    element.style.display = '';
-    return element;
-  }
-
-
-  Object.extend(methods, {
-    visible: visible,
-    toggle:  toggle,
-    hide:    hide,
-    show:    show
-  });
-
-
-  function remove(element) {
-    element = $(element);
-    element.parentNode.removeChild(element);
-    return element;
-  }
-
-  var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
-    var el = document.createElement("select"),
-        isBuggy = true;
-    el.innerHTML = "<option value=\"test\">test</option>";
-    if (el.options && el.options[0]) {
-      isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
-    }
-    el = null;
-    return isBuggy;
-  })();
-
-  var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
-    try {
-      var el = document.createElement("table");
-      if (el && el.tBodies) {
-        el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
-        var isBuggy = typeof el.tBodies[0] == "undefined";
-        el = null;
-        return isBuggy;
-      }
-    } catch (e) {
-      return true;
-    }
-  })();
-
-  var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
-    try {
-      var el = document.createElement('div');
-      el.innerHTML = "<link />";
-      var isBuggy = (el.childNodes.length === 0);
-      el = null;
-      return isBuggy;
-    } catch(e) {
-      return true;
-    }
-  })();
-
-  var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
-   TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;
-
-  var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
-    var s = document.createElement("script"),
-        isBuggy = false;
-    try {
-      s.appendChild(document.createTextNode(""));
-      isBuggy = !s.firstChild ||
-        s.firstChild && s.firstChild.nodeType !== 3;
-    } catch (e) {
-      isBuggy = true;
-    }
-    s = null;
-    return isBuggy;
-  })();
-
-  function update(element, content) {
-    element = $(element);
-
-    var descendants = element.getElementsByTagName('*'),
-     i = descendants.length;
-    while (i--) purgeElement(descendants[i]);
-
-    if (content && content.toElement)
-      content = content.toElement();
-
-    if (Object.isElement(content))
-      return element.update().insert(content);
-
-
-    content = Object.toHTML(content);
-    var tagName = element.tagName.toUpperCase();
-
-    if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
-      element.text = content;
-      return element;
-    }
-
-    if (ANY_INNERHTML_BUGGY) {
-      if (tagName in INSERTION_TRANSLATIONS.tags) {
-        while (element.firstChild)
-          element.removeChild(element.firstChild);
-
-        var nodes = getContentFromAnonymousElement(tagName, content.stripScripts());
-        for (var i = 0, node; node = nodes[i]; i++)
-          element.appendChild(node);
-
-      } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
-        while (element.firstChild)
-          element.removeChild(element.firstChild);
-
-        var nodes = getContentFromAnonymousElement(tagName,
-         content.stripScripts(), true);
-
-        for (var i = 0, node; node = nodes[i]; i++)
-          element.appendChild(node);
-      } else {
-        element.innerHTML = content.stripScripts();
-      }
-    } else {
-      element.innerHTML = content.stripScripts();
-    }
-
-    content.evalScripts.bind(content).defer();
-    return element;
-  }
-
-  function replace(element, content) {
-    element = $(element);
-
-    if (content && content.toElement) {
-      content = content.toElement();
-    } else if (!Object.isElement(content)) {
-      content = Object.toHTML(content);
-      var range = element.ownerDocument.createRange();
-      range.selectNode(element);
-      content.evalScripts.bind(content).defer();
-      content = range.createContextualFragment(content.stripScripts());
-    }
-
-    element.parentNode.replaceChild(content, element);
-    return element;
-  }
-
-  var INSERTION_TRANSLATIONS = {
-    before: function(element, node) {
-      element.parentNode.insertBefore(node, element);
-    },
-    top: function(element, node) {
-      element.insertBefore(node, element.firstChild);
-    },
-    bottom: function(element, node) {
-      element.appendChild(node);
-    },
-    after: function(element, node) {
-      element.parentNode.insertBefore(node, element.nextSibling);
-    },
-
-    tags: {
-      TABLE:  ['<table>',                '</table>',                   1],
-      TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
-      TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
-      TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
-      SELECT: ['<select>',               '</select>',                  1]
-    }
-  };
-
-  var tags = INSERTION_TRANSLATIONS.tags;
-
-  Object.extend(tags, {
-    THEAD: tags.TBODY,
-    TFOOT: tags.TBODY,
-    TH:    tags.TD
-  });
-
-  function replace_IE(element, content) {
-    element = $(element);
-    if (content && content.toElement)
-      content = content.toElement();
-    if (Object.isElement(content)) {
-      element.parentNode.replaceChild(content, element);
-      return element;
-    }
-
-    content = Object.toHTML(content);
-    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
-
-    if (tagName in INSERTION_TRANSLATIONS.tags) {
-      var nextSibling = Element.next(element);
-      var fragments = getContentFromAnonymousElement(
-       tagName, content.stripScripts());
-
-      parent.removeChild(element);
-
-      var iterator;
-      if (nextSibling)
-        iterator = function(node) { parent.insertBefore(node, nextSibling) };
-      else
-        iterator = function(node) { parent.appendChild(node); }
-
-      fragments.each(iterator);
-    } else {
-      element.outerHTML = content.stripScripts();
-    }
-
-    content.evalScripts.bind(content).defer();
-    return element;
-  }
-
-  if ('outerHTML' in document.documentElement)
-    replace = replace_IE;
-
-  function isContent(content) {
-    if (Object.isUndefined(content) || content === null) return false;
-
-    if (Object.isString(content) || Object.isNumber(content)) return true;
-    if (Object.isElement(content)) return true;
-    if (content.toElement || content.toHTML) return true;
-
-    return false;
-  }
-
-  function insertContentAt(element, content, position) {
-    position   = position.toLowerCase();
-    var method = INSERTION_TRANSLATIONS[position];
-
-    if (content && content.toElement) content = content.toElement();
-    if (Object.isElement(content)) {
-      method(element, content);
-      return element;
-    }
-
-    content = Object.toHTML(content);
-    var tagName = ((position === 'before' || position === 'after') ?
-     element.parentNode : element).tagName.toUpperCase();
-
-    var childNodes = getContentFromAnonymousElement(tagName, content.stripScripts());
-
-    if (position === 'top' || position === 'after') childNodes.reverse();
-
-    for (var i = 0, node; node = childNodes[i]; i++)
-      method(element, node);
-
-    content.evalScripts.bind(content).defer();
-  }
-
-  function insert(element, insertions) {
-    element = $(element);
-
-    if (isContent(insertions))
-      insertions = { bottom: insertions };
-
-    for (var position in insertions)
-      insertContentAt(element, insertions[position], position);
-
-    return element;
-  }
-
-  function wrap(element, wrapper, attributes) {
-    element = $(element);
-
-    if (Object.isElement(wrapper)) {
-      $(wrapper).writeAttribute(attributes || {});
-    } else if (Object.isString(wrapper)) {
-      wrapper = new Element(wrapper, attributes);
-    } else {
-      wrapper = new Element('div', wrapper);
-    }
-
-    if (element.parentNode)
-      element.parentNode.replaceChild(wrapper, element);
-
-    wrapper.appendChild(element);
-
-    return wrapper;
-  }
-
-  function cleanWhitespace(element) {
-    element = $(element);
-    var node = element.firstChild;
-
-    while (node) {
-      var nextNode = node.nextSibling;
-      if (node.nodeType === Node.TEXT_NODE && !/\S/.test(node.nodeValue))
-        element.removeChild(node);
-      node = nextNode;
-    }
-    return element;
-  }
-
-  function empty(element) {
-    return $(element).innerHTML.blank();
-  }
-
-  function getContentFromAnonymousElement(tagName, html, force) {
-    var t = INSERTION_TRANSLATIONS.tags[tagName], div = DIV;
-
-    var workaround = !!t;
-    if (!workaround && force) {
-      workaround = true;
-      t = ['', '', 0];
-    }
-
-    if (workaround) {
-      div.innerHTML = ' ' + t[0] + html + t[1];
-      div.removeChild(div.firstChild);
-      for (var i = t[2]; i--; )
-        div = div.firstChild;
-    } else {
-      div.innerHTML = html;
-    }
-
-    return $A(div.childNodes);
-  }
-
-  function clone(element, deep) {
-    if (!(element = $(element))) return;
-    var clone = element.cloneNode(deep);
-    if (!HAS_UNIQUE_ID_PROPERTY) {
-      clone._prototypeUID = UNDEFINED;
-      if (deep) {
-        var descendants = Element.select(clone, '*'),
-         i = descendants.length;
-        while (i--)
-          descendants[i]._prototypeUID = UNDEFINED;
-      }
-    }
-    return Element.extend(clone);
-  }
-
-  function purgeElement(element) {
-    var uid = getUniqueElementID(element);
-    if (uid) {
-      Element.stopObserving(element);
-      if (!HAS_UNIQUE_ID_PROPERTY)
-        element._prototypeUID = UNDEFINED;
-      delete Element.Storage[uid];
-    }
-  }
-
-  function purgeCollection(elements) {
-    var i = elements.length;
-    while (i--)
-      purgeElement(elements[i]);
-  }
-
-  function purgeCollection_IE(elements) {
-    var i = elements.length, element, uid;
-    while (i--) {
-      element = elements[i];
-      uid = getUniqueElementID(element);
-      delete Element.Storage[uid];
-      delete Event.cache[uid];
-    }
-  }
-
-  if (HAS_UNIQUE_ID_PROPERTY) {
-    purgeCollection = purgeCollection_IE;
-  }
-
-
-  function purge(element) {
-    if (!(element = $(element))) return;
-    purgeElement(element);
-
-    var descendants = element.getElementsByTagName('*'),
-     i = descendants.length;
-
-    while (i--) purgeElement(descendants[i]);
-
-    return null;
-  }
-
-  Object.extend(methods, {
-    remove:  remove,
-    update:  update,
-    replace: replace,
-    insert:  insert,
-    wrap:    wrap,
-    cleanWhitespace: cleanWhitespace,
-    empty:   empty,
-    clone:   clone,
-    purge:   purge
-  });
-
-
-
-  function recursivelyCollect(element, property, maximumLength) {
-    element = $(element);
-    maximumLength = maximumLength || -1;
-    var elements = [];
-
-    while (element = element[property]) {
-      if (element.nodeType === Node.ELEMENT_NODE)
-        elements.push(Element.extend(element));
-
-      if (elements.length === maximumLength) break;
-    }
-
-    return elements;
-  }
-
-
-  function ancestors(element) {
-    return recursivelyCollect(element, 'parentNode');
-  }
-
-  function descendants(element) {
-    return Element.select(element, '*');
-  }
-
-  function firstDescendant(element) {
-    element = $(element).firstChild;
-    while (element && element.nodeType !== Node.ELEMENT_NODE)
-      element = element.nextSibling;
-
-    return $(element);
-  }
-
-  function immediateDescendants(element) {
-    var results = [], child = $(element).firstChild;
-
-    while (child) {
-      if (child.nodeType === Node.ELEMENT_NODE)
-        results.push(Element.extend(child));
-
-      child = child.nextSibling;
-    }
-
-    return results;
-  }
-
-  function previousSiblings(element) {
-    return recursivelyCollect(element, 'previousSibling');
-  }
-
-  function nextSiblings(element) {
-    return recursivelyCollect(element, 'nextSibling');
-  }
-
-  function siblings(element) {
-    element = $(element);
-    var previous = previousSiblings(element),
-     next = nextSiblings(element);
-    return previous.reverse().concat(next);
-  }
-
-  function match(element, selector) {
-    element = $(element);
-
-    if (Object.isString(selector))
-      return Prototype.Selector.match(element, selector);
-
-    return selector.match(element);
-  }
-
-
-  function _recursivelyFind(element, property, expression, index) {
-    element = $(element), expression = expression || 0, index = index || 0;
-    if (Object.isNumber(expression)) {
-      index = expression, expression = null;
-    }
-
-    while (element = element[property]) {
-      if (element.nodeType !== 1) continue;
-      if (expression && !Prototype.Selector.match(element, expression))
-        continue;
-      if (--index >= 0) continue;
-
-      return Element.extend(element);
-    }
-  }
-
-
-  function up(element, expression, index) {
-    element = $(element);
-
-    if (arguments.length === 1) return $(element.parentNode);
-    return _recursivelyFind(element, 'parentNode', expression, index);
-  }
-
-  function down(element, expression, index) {
-    if (arguments.length === 1) return firstDescendant(element);
-    element = $(element), expression = expression || 0, index = index || 0;
-
-    if (Object.isNumber(expression))
-      index = expression, expression = '*';
-
-    var node = Prototype.Selector.select(expression, element)[index];
-    return Element.extend(node);
-  }
-
-  function previous(element, expression, index) {
-    return _recursivelyFind(element, 'previousSibling', expression, index);
-  }
-
-  function next(element, expression, index) {
-    return _recursivelyFind(element, 'nextSibling', expression, index);
-  }
-
-  function select(element) {
-    element = $(element);
-    var expressions = SLICE.call(arguments, 1).join(', ');
-    return Prototype.Selector.select(expressions, element);
-  }
-
-  function adjacent(element) {
-    element = $(element);
-    var expressions = SLICE.call(arguments, 1).join(', ');
-    var siblings = Element.siblings(element), results = [];
-    for (var i = 0, sibling; sibling = siblings[i]; i++) {
-      if (Prototype.Selector.match(sibling, expressions))
-        results.push(sibling);
-    }
-
-    return results;
-  }
-
-  function descendantOf_DOM(element, ancestor) {
-    element = $(element), ancestor = $(ancestor);
-    if (!element || !ancestor) return false;
-    while (element = element.parentNode)
-      if (element === ancestor) return true;
-    return false;
-  }
-
-  function descendantOf_contains(element, ancestor) {
-    element = $(element), ancestor = $(ancestor);
-    if (!element || !ancestor) return false;
-    if (!ancestor.contains) return descendantOf_DOM(element, ancestor);
-    return ancestor.contains(element) && ancestor !== element;
-  }
-
-  function descendantOf_compareDocumentPosition(element, ancestor) {
-    element = $(element), ancestor = $(ancestor);
-    if (!element || !ancestor) return false;
-    return (element.compareDocumentPosition(ancestor) & 8) === 8;
-  }
-
-  var descendantOf;
-  if (DIV.compareDocumentPosition) {
-    descendantOf = descendantOf_compareDocumentPosition;
-  } else if (DIV.contains) {
-    descendantOf = descendantOf_contains;
-  } else {
-    descendantOf = descendantOf_DOM;
-  }
-
-
-  Object.extend(methods, {
-    recursivelyCollect:   recursivelyCollect,
-    ancestors:            ancestors,
-    descendants:          descendants,
-    firstDescendant:      firstDescendant,
-    immediateDescendants: immediateDescendants,
-    previousSiblings:     previousSiblings,
-    nextSiblings:         nextSiblings,
-    siblings:             siblings,
-    match:                match,
-    up:                   up,
-    down:                 down,
-    previous:             previous,
-    next:                 next,
-    select:               select,
-    adjacent:             adjacent,
-    descendantOf:         descendantOf,
-
-    getElementsBySelector: select,
-
-    childElements:         immediateDescendants
-  });
-
-
-  var idCounter = 1;
-  function identify(element) {
-    element = $(element);
-    var id = Element.readAttribute(element, 'id');
-    if (id) return id;
-
-    do { id = 'anonymous_element_' + idCounter++ } while ($(id));
-
-    Element.writeAttribute(element, 'id', id);
-    return id;
-  }
-
-
-  function readAttribute(element, name) {
-    return $(element).getAttribute(name);
-  }
-
-  function readAttribute_IE(element, name) {
-    element = $(element);
-
-    var table = ATTRIBUTE_TRANSLATIONS.read;
-    if (table.values[name])
-      return table.values[name](element, name);
-
-    if (table.names[name]) name = table.names[name];
-
-    if (name.include(':')) {
-      if (!element.attributes || !element.attributes[name]) return null;
-      return element.attributes[name].value;
-    }
-
-    return element.getAttribute(name);
-  }
-
-  function readAttribute_Opera(element, name) {
-    if (name === 'title') return element.title;
-    return element.getAttribute(name);
-  }
-
-  var PROBLEMATIC_ATTRIBUTE_READING = (function() {
-    DIV.setAttribute('onclick', []);
-    var value = DIV.getAttribute('onclick');
-    var isFunction = Object.isArray(value);
-    DIV.removeAttribute('onclick');
-    return isFunction;
-  })();
-
-  if (PROBLEMATIC_ATTRIBUTE_READING) {
-    readAttribute = readAttribute_IE;
-  } else if (Prototype.Browser.Opera) {
-    readAttribute = readAttribute_Opera;
-  }
-
-
-  function writeAttribute(element, name, value) {
-    element = $(element);
-    var attributes = {}, table = ATTRIBUTE_TRANSLATIONS.write;
-
-    if (typeof name === 'object') {
-      attributes = name;
-    } else {
-      attributes[name] = Object.isUndefined(value) ? true : value;
-    }
-
-    for (var attr in attributes) {
-      name = table.names[attr] || attr;
-      value = attributes[attr];
-      if (table.values[attr]) {
-        value = table.values[attr](element, value);
-        if (Object.isUndefined(value)) continue;
-      }
-      if (value === false || value === null)
-        element.removeAttribute(name);
-      else if (value === true)
-        element.setAttribute(name, name);
-      else element.setAttribute(name, value);
-    }
-
-    return element;
-  }
-
-  var PROBLEMATIC_HAS_ATTRIBUTE_WITH_CHECKBOXES = (function () {
-    if (!HAS_EXTENDED_CREATE_ELEMENT_SYNTAX) {
-      return false;
-    }
-    var checkbox = document.createElement('<input type="checkbox">');
-    checkbox.checked = true;
-    var node = checkbox.getAttributeNode('checked');
-    return !node || !node.specified;
-  })();
-
-  function hasAttribute(element, attribute) {
-    attribute = ATTRIBUTE_TRANSLATIONS.has[attribute] || attribute;
-    var node = $(element).getAttributeNode(attribute);
-    return !!(node && node.specified);
-  }
-
-  function hasAttribute_IE(element, attribute) {
-    if (attribute === 'checked') {
-      return element.checked;
-    }
-    return hasAttribute(element, attribute);
-  }
-
-  GLOBAL.Element.Methods.Simulated.hasAttribute =
-   PROBLEMATIC_HAS_ATTRIBUTE_WITH_CHECKBOXES ?
-   hasAttribute_IE : hasAttribute;
-
-  function classNames(element) {
-    return new Element.ClassNames(element);
-  }
-
-  var regExpCache = {};
-  function getRegExpForClassName(className) {
-    if (regExpCache[className]) return regExpCache[className];
-
-    var re = new RegExp("(^|\\s+)" + className + "(\\s+|$)");
-    regExpCache[className] = re;
-    return re;
-  }
-
-  function hasClassName(element, className) {
-    if (!(element = $(element))) return;
-
-    var elementClassName = element.className;
-
-    if (elementClassName.length === 0) return false;
-    if (elementClassName === className) return true;
-
-    return getRegExpForClassName(className).test(elementClassName);
-  }
-
-  function addClassName(element, className) {
-    if (!(element = $(element))) return;
-
-    if (!hasClassName(element, className))
-      element.className += (element.className ? ' ' : '') + className;
-
-    return element;
-  }
-
-  function removeClassName(element, className) {
-    if (!(element = $(element))) return;
-
-    element.className = element.className.replace(
-     getRegExpForClassName(className), ' ').strip();
-
-    return element;
-  }
-
-  function toggleClassName(element, className, bool) {
-    if (!(element = $(element))) return;
-
-    if (Object.isUndefined(bool))
-      bool = !hasClassName(element, className);
-
-    var method = Element[bool ? 'addClassName' : 'removeClassName'];
-    return method(element, className);
-  }
-
-  var ATTRIBUTE_TRANSLATIONS = {};
-
-  var classProp = 'className', forProp = 'for';
-
-  DIV.setAttribute(classProp, 'x');
-  if (DIV.className !== 'x') {
-    DIV.setAttribute('class', 'x');
-    if (DIV.className === 'x')
-      classProp = 'class';
-  }
-
-  var LABEL = document.createElement('label');
-  LABEL.setAttribute(forProp, 'x');
-  if (LABEL.htmlFor !== 'x') {
-    LABEL.setAttribute('htmlFor', 'x');
-    if (LABEL.htmlFor === 'x')
-      forProp = 'htmlFor';
-  }
-  LABEL = null;
-
-  function _getAttr(element, attribute) {
-    return element.getAttribute(attribute);
-  }
-
-  function _getAttr2(element, attribute) {
-    return element.getAttribute(attribute, 2);
-  }
-
-  function _getAttrNode(element, attribute) {
-    var node = element.getAttributeNode(attribute);
-    return node ? node.value : '';
-  }
-
-  function _getFlag(element, attribute) {
-    return $(element).hasAttribute(attribute) ? attribute : null;
-  }
-
-  DIV.onclick = Prototype.emptyFunction;
-  var onclickValue = DIV.getAttribute('onclick');
-
-  var _getEv;
-
-  if (String(onclickValue).indexOf('{') > -1) {
-    _getEv = function(element, attribute) {
-      var value = element.getAttribute(attribute);
-      if (!value) return null;
-      value = value.toString();
-      value = value.split('{')[1];
-      value = value.split('}')[0];
-      return value.strip();
-    };
-  }
-  else if (onclickValue === '') {
-    _getEv = function(element, attribute) {
-      var value = element.getAttribute(attribute);
-      if (!value) return null;
-      return value.strip();
-    };
-  }
-
-  ATTRIBUTE_TRANSLATIONS.read = {
-    names: {
-      'class':     classProp,
-      'className': classProp,
-      'for':       forProp,
-      'htmlFor':   forProp
-    },
-
-    values: {
-      style: function(element) {
-        return element.style.cssText.toLowerCase();
-      },
-      title: function(element) {
-        return element.title;
-      }
-    }
-  };
-
-  ATTRIBUTE_TRANSLATIONS.write = {
-    names: {
-      className:   'class',
-      htmlFor:     'for',
-      cellpadding: 'cellPadding',
-      cellspacing: 'cellSpacing'
-    },
-
-    values: {
-      checked: function(element, value) {
-        value = !!value;
-        element.checked = value;
-        return value ? 'checked' : null;
-      },
-
-      style: function(element, value) {
-        element.style.cssText = value ? value : '';
-      }
-    }
-  };
-
-  ATTRIBUTE_TRANSLATIONS.has = { names: {} };
-
-  Object.extend(ATTRIBUTE_TRANSLATIONS.write.names,
-   ATTRIBUTE_TRANSLATIONS.read.names);
-
-  var CAMEL_CASED_ATTRIBUTE_NAMES = $w('colSpan rowSpan vAlign dateTime ' +
-   'accessKey tabIndex encType maxLength readOnly longDesc frameBorder');
-
-  for (var i = 0, attr; attr = CAMEL_CASED_ATTRIBUTE_NAMES[i]; i++) {
-    ATTRIBUTE_TRANSLATIONS.write.names[attr.toLowerCase()] = attr;
-    ATTRIBUTE_TRANSLATIONS.has.names[attr.toLowerCase()]   = attr;
-  }
-
-  Object.extend(ATTRIBUTE_TRANSLATIONS.read.values, {
-    href:        _getAttr2,
-    src:         _getAttr2,
-    type:        _getAttr,
-    action:      _getAttrNode,
-    disabled:    _getFlag,
-    checked:     _getFlag,
-    readonly:    _getFlag,
-    multiple:    _getFlag,
-    onload:      _getEv,
-    onunload:    _getEv,
-    onclick:     _getEv,
-    ondblclick:  _getEv,
-    onmousedown: _getEv,
-    onmouseup:   _getEv,
-    onmouseover: _getEv,
-    onmousemove: _getEv,
-    onmouseout:  _getEv,
-    onfocus:     _getEv,
-    onblur:      _getEv,
-    onkeypress:  _getEv,
-    onkeydown:   _getEv,
-    onkeyup:     _getEv,
-    onsubmit:    _getEv,
-    onreset:     _getEv,
-    onselect:    _getEv,
-    onchange:    _getEv
-  });
-
-
-  Object.extend(methods, {
-    identify:        identify,
-    readAttribute:   readAttribute,
-    writeAttribute:  writeAttribute,
-    classNames:      classNames,
-    hasClassName:    hasClassName,
-    addClassName:    addClassName,
-    removeClassName: removeClassName,
-    toggleClassName: toggleClassName
-  });
-
-
-  function normalizeStyleName(style) {
-    if (style === 'float' || style === 'styleFloat')
-      return 'cssFloat';
-    return style.camelize();
-  }
-
-  function normalizeStyleName_IE(style) {
-    if (style === 'float' || style === 'cssFloat')
-      return 'styleFloat';
-    return style.camelize();
-  }
-
-  function setStyle(element, styles) {
-    element = $(element);
-    var elementStyle = element.style, match;
-
-    if (Object.isString(styles)) {
-      elementStyle.cssText += ';' + styles;
-      if (styles.include('opacity')) {
-        var opacity = styles.match(/opacity:\s*(\d?\.?\d*)/)[1];
-        Element.setOpacity(element, opacity);
-      }
-      return element;
-    }
-
-    for (var property in styles) {
-      if (property === 'opacity') {
-        Element.setOpacity(element, styles[property]);
-      } else {
-        var value = styles[property];
-        if (property === 'float' || property === 'cssFloat') {
-          property = Object.isUndefined(elementStyle.styleFloat) ?
-           'cssFloat' : 'styleFloat';
-        }
-        elementStyle[property] = value;
-      }
-    }
-
-    return element;
-  }
-
-
-  function getStyle(element, style) {
-    element = $(element);
-    style = normalizeStyleName(style);
-
-    var value = element.style[style];
-    if (!value || value === 'auto') {
-      var css = document.defaultView.getComputedStyle(element, null);
-      value = css ? css[style] : null;
-    }
-
-    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
-    return value === 'auto' ? null : value;
-  }
-
-  function getStyle_Opera(element, style) {
-    switch (style) {
-      case 'height': case 'width':
-        if (!Element.visible(element)) return null;
-
-        var dim = parseInt(getStyle(element, style), 10);
-
-        if (dim !== element['offset' + style.capitalize()])
-          return dim + 'px';
-
-        return Element.measure(element, style);
-
-      default: return getStyle(element, style);
-    }
-  }
-
-  function getStyle_IE(element, style) {
-    element = $(element);
-    style = normalizeStyleName_IE(style);
-
-    var value = element.style[style];
-    if (!value && element.currentStyle) {
-      value = element.currentStyle[style];
-    }
-
-    if (style === 'opacity') {
-      if (!STANDARD_CSS_OPACITY_SUPPORTED)
-        return getOpacity_IE(element);
-      else return value ? parseFloat(value) : 1.0;
-    }
-
-    if (value === 'auto') {
-      if ((style === 'width' || style === 'height') && Element.visible(element))
-        return Element.measure(element, style) + 'px';
-      return null;
-    }
-
-    return value;
-  }
-
-  function stripAlphaFromFilter_IE(filter) {
-    return (filter || '').replace(/alpha$[^$]*\)/gi, '');
-  }
-
-  function hasLayout_IE(element) {
-    if (!element.currentStyle || !element.currentStyle.hasLayout)
-      element.style.zoom = 1;
-    return element;
-  }
-
-  var STANDARD_CSS_OPACITY_SUPPORTED = (function() {
-    DIV.style.cssText = "opacity:.55";
-    return /^0.55/.test(DIV.style.opacity);
-  })();
-
-  function setOpacity(element, value) {
-    element = $(element);
-    if (value == 1 || value === '') value = '';
-    else if (value < 0.00001) value = 0;
-    element.style.opacity = value;
-    return element;
-  }
-
-  function setOpacity_IE(element, value) {
-    if (STANDARD_CSS_OPACITY_SUPPORTED)
-      return setOpacity(element, value);
-
-    element = hasLayout_IE($(element));
-    var filter = Element.getStyle(element, 'filter'),
-     style = element.style;
-
-    if (value == 1 || value === '') {
-      filter = stripAlphaFromFilter_IE(filter);
-      if (filter) style.filter = filter;
-      else style.removeAttribute('filter');
-      return element;
-    }
-
-    if (value < 0.00001) value = 0;
-
-    style.filter = stripAlphaFromFilter_IE(filter) +
-     ' alpha(opacity=' + (value * 100) + ')';
-
-    return element;
-  }
-
-
-  function getOpacity(element) {
-    return Element.getStyle(element, 'opacity');
-  }
-
-  function getOpacity_IE(element) {
-    if (STANDARD_CSS_OPACITY_SUPPORTED)
-      return getOpacity(element);
-
-    var filter = Element.getStyle(element, 'filter');
-    if (filter.length === 0) return 1.0;
-    var match = (filter || '').match(/alpha$opacity=(.*)$/i);
-    if (match && match[1]) return parseFloat(match[1]) / 100;
-    return 1.0;
-  }
-
-
-  Object.extend(methods, {
-    setStyle:   setStyle,
-    getStyle:   getStyle,
-    setOpacity: setOpacity,
-    getOpacity: getOpacity
-  });
-
-  if ('styleFloat' in DIV.style) {
-    methods.getStyle = getStyle_IE;
-    methods.setOpacity = setOpacity_IE;
-    methods.getOpacity = getOpacity_IE;
-  }
-
-  var UID = 0;
-
-  GLOBAL.Element.Storage = { UID: 1 };
-
-  function getUniqueElementID(element) {
-    if (element === window) return 0;
-
-    if (typeof element._prototypeUID === 'undefined')
-      element._prototypeUID = Element.Storage.UID++;
-    return element._prototypeUID;
-  }
-
-  function getUniqueElementID_IE(element) {
-    if (element === window) return 0;
-    if (element == document) return 1;
-    return element.uniqueID;
-  }
-
-  var HAS_UNIQUE_ID_PROPERTY = ('uniqueID' in DIV);
-  if (HAS_UNIQUE_ID_PROPERTY)
-    getUniqueElementID = getUniqueElementID_IE;
-
-  function getStorage(element) {
-    if (!(element = $(element))) return;
-
-    var uid = getUniqueElementID(element);
-
-    if (!Element.Storage[uid])
-      Element.Storage[uid] = $H();
-
-    return Element.Storage[uid];
-  }
-
-  function store(element, key, value) {
-    if (!(element = $(element))) return;
-    var storage = getStorage(element);
-    if (arguments.length === 2) {
-      storage.update(key);
-    } else {
-      storage.set(key, value);
-    }
-    return element;
-  }
-
-  function retrieve(element, key, defaultValue) {
-    if (!(element = $(element))) return;
-    var storage = getStorage(element), value = storage.get(key);
-
-    if (Object.isUndefined(value)) {
-      storage.set(key, defaultValue);
-      value = defaultValue;
-    }
-
-    return value;
-  }
-
-
-  Object.extend(methods, {
-    getStorage: getStorage,
-    store:      store,
-    retrieve:   retrieve
-  });
-
-
-  var Methods = {}, ByTag = Element.Methods.ByTag,
-   F = Prototype.BrowserFeatures;
-
-  if (!F.ElementExtensions && ('__proto__' in DIV)) {
-    GLOBAL.HTMLElement = {};
-    GLOBAL.HTMLElement.prototype = DIV['__proto__'];
-    F.ElementExtensions = true;
-  }
-
-  function checkElementPrototypeDeficiency(tagName) {
-    if (typeof window.Element === 'undefined') return false;
-    if (!HAS_EXTENDED_CREATE_ELEMENT_SYNTAX) return false;
-    var proto = window.Element.prototype;
-    if (proto) {
-      var id = '_' + (Math.random() + '').slice(2),
-       el = document.createElement(tagName);
-      proto[id] = 'x';
-      var isBuggy = (el[id] !== 'x');
-      delete proto[id];
-      el = null;
-      return isBuggy;
-    }
-
-    return false;
-  }
-
-  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY =
-   checkElementPrototypeDeficiency('object');
-
-  function extendElementWith(element, methods) {
-    for (var property in methods) {
-      var value = methods[property];
-      if (Object.isFunction(value) && !(property in element))
-        element[property] = value.methodize();
-    }
-  }
-
-  var EXTENDED = {};
-  function elementIsExtended(element) {
-    var uid = getUniqueElementID(element);
-    return (uid in EXTENDED);
-  }
-
-  function extend(element) {
-    if (!element || elementIsExtended(element)) return element;
-    if (element.nodeType !== Node.ELEMENT_NODE || element == window)
-      return element;
-
-    var methods = Object.clone(Methods),
-     tagName = element.tagName.toUpperCase();
-
-    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
-
-    extendElementWith(element, methods);
-    EXTENDED[getUniqueElementID(element)] = true;
-    return element;
-  }
-
-  function extend_IE8(element) {
-    if (!element || elementIsExtended(element)) return element;
-
-    var t = element.tagName;
-    if (t && (/^(?:object|applet|embed)$/i.test(t))) {
-      extendElementWith(element, Element.Methods);
-      extendElementWith(element, Element.Methods.Simulated);
-      extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
-    }
-
-    return element;
-  }
-
-  if (F.SpecificElementExtensions) {
-    extend = HTMLOBJECTELEMENT_PROTOTYPE_BUGGY ? extend_IE8 : Prototype.K;
-  }
-
-  function addMethodsToTagName(tagName, methods) {
-    tagName = tagName.toUpperCase();
-    if (!ByTag[tagName]) ByTag[tagName] = {};
-    Object.extend(ByTag[tagName], methods);
-  }
-
-  function mergeMethods(destination, methods, onlyIfAbsent) {
-    if (Object.isUndefined(onlyIfAbsent)) onlyIfAbsent = false;
-    for (var property in methods) {
-      var value = methods[property];
-      if (!Object.isFunction(value)) continue;
-      if (!onlyIfAbsent || !(property in destination))
-        destination[property] = value.methodize();
-    }
-  }
-
-  function findDOMClass(tagName) {
-    var klass;
-    var trans = {
-      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
-      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
-      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
-      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
-      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
-      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
-      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
-      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
-      "FrameSet", "IFRAME": "IFrame"
-    };
-    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
-    if (window[klass]) return window[klass];
-    klass = 'HTML' + tagName + 'Element';
-    if (window[klass]) return window[klass];
-    klass = 'HTML' + tagName.capitalize() + 'Element';
-    if (window[klass]) return window[klass];
-
-    var element = document.createElement(tagName),
-     proto = element['__proto__'] || element.constructor.prototype;
-
-    element = null;
-    return proto;
-  }
-
-  function addMethods(methods) {
-    if (arguments.length === 0) addFormMethods();
-
-    if (arguments.length === 2) {
-      var tagName = methods;
-      methods = arguments[1];
-    }
-
-    if (!tagName) {
-      Object.extend(Element.Methods, methods || {});
-    } else {
-      if (Object.isArray(tagName)) {
-        for (var i = 0, tag; tag = tagName[i]; i++)
-          addMethodsToTagName(tag, methods);
-      } else {
-        addMethodsToTagName(tagName, methods);
-      }
-    }
-
-    var ELEMENT_PROTOTYPE = window.HTMLElement ? HTMLElement.prototype :
-     Element.prototype;
-
-    if (F.ElementExtensions) {
-      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods);
-      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods.Simulated, true);
-    }
-
-    if (F.SpecificElementExtensions) {
-      for (var tag in Element.Methods.ByTag) {
-        var klass = findDOMClass(tag);
-        if (Object.isUndefined(klass)) continue;
-        mergeMethods(klass.prototype, ByTag[tag]);
-      }
-    }
-
-    Object.extend(Element, Element.Methods);
-    Object.extend(Element, Element.Methods.Simulated);
-    delete Element.ByTag;
-    delete Element.Simulated;
-
-    Element.extend.refresh();
-
-    ELEMENT_CACHE = {};
-  }
-
-  Object.extend(GLOBAL.Element, {
-    extend:     extend,
-    addMethods: addMethods
-  });
-
-  if (extend === Prototype.K) {
-    GLOBAL.Element.extend.refresh = Prototype.emptyFunction;
-  } else {
-    GLOBAL.Element.extend.refresh = function() {
-      if (Prototype.BrowserFeatures.ElementExtensions) return;
-      Object.extend(Methods, Element.Methods);
-      Object.extend(Methods, Element.Methods.Simulated);
-
-      EXTENDED = {};
-    };
-  }
-
-  function addFormMethods() {
-    Object.extend(Form, Form.Methods);
-    Object.extend(Form.Element, Form.Element.Methods);
-    Object.extend(Element.Methods.ByTag, {
-      "FORM":     Object.clone(Form.Methods),
-      "INPUT":    Object.clone(Form.Element.Methods),
-      "SELECT":   Object.clone(Form.Element.Methods),
-      "TEXTAREA": Object.clone(Form.Element.Methods),
-      "BUTTON":   Object.clone(Form.Element.Methods)
-    });
-  }
-
-  Element.addMethods(methods);
-
-  function destroyCache_IE() {
-    DIV = null;
-    ELEMENT_CACHE = null;
-  }
-
-  if (window.attachEvent)
-    window.attachEvent('onunload', destroyCache_IE);
-
-})(this);
-(function() {
-
-  function toDecimal(pctString) {
-    var match = pctString.match(/^(\d+)%?$/i);
-    if (!match) return null;
-    return (Number(match[1]) / 100);
-  }
-
-  function getRawStyle(element, style) {
-    element = $(element);
-
-    var value = element.style[style];
-    if (!value || value === 'auto') {
-      var css = document.defaultView.getComputedStyle(element, null);
-      value = css ? css[style] : null;
-    }
-
-    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
-    return value === 'auto' ? null : value;
-  }
-
-  function getRawStyle_IE(element, style) {
-    var value = element.style[style];
-    if (!value && element.currentStyle) {
-      value = element.currentStyle[style];
-    }
-    return value;
-  }
-
-  function getContentWidth(element, context) {
-    var boxWidth = element.offsetWidth;
-
-    var bl = getPixelValue(element, 'borderLeftWidth',  context) || 0;
-    var br = getPixelValue(element, 'borderRightWidth', context) || 0;
-    var pl = getPixelValue(element, 'paddingLeft',      context) || 0;
-    var pr = getPixelValue(element, 'paddingRight',     context) || 0;
-
-    return boxWidth - bl - br - pl - pr;
-  }
-
-  if (!Object.isUndefined(document.documentElement.currentStyle) && !Prototype.Browser.Opera) {
-    getRawStyle = getRawStyle_IE;
-  }
-
-
-  function getPixelValue(value, property, context) {
-    var element = null;
-    if (Object.isElement(value)) {
-      element = value;
-      value = getRawStyle(element, property);
-    }
-
-    if (value === null || Object.isUndefined(value)) {
-      return null;
-    }
-
-    if ((/^(?:-)?\d+(\.\d+)?(px)?$/i).test(value)) {
-      return window.parseFloat(value);
-    }
-
-    var isPercentage = value.include('%'), isViewport = (context === document.viewport);
-
-    if (/\d/.test(value) && element && element.runtimeStyle && !(isPercentage && isViewport)) {
-      var style = element.style.left, rStyle = element.runtimeStyle.left;
-      element.runtimeStyle.left = element.currentStyle.left;
-      element.style.left = value || 0;
-      value = element.style.pixelLeft;
-      element.style.left = style;
-      element.runtimeStyle.left = rStyle;
-
-      return value;
-    }
-
-    if (element && isPercentage) {
-      context = context || element.parentNode;
-      var decimal = toDecimal(value), whole = null;
-
-      var isHorizontal = property.include('left') || property.include('right') ||
-       property.include('width');
-
-      var isVertical   = property.include('top') || property.include('bottom') ||
-        property.include('height');
-
-      if (context === document.viewport) {
-        if (isHorizontal) {
-          whole = document.viewport.getWidth();
-        } else if (isVertical) {
-          whole = document.viewport.getHeight();
-        }
-      } else {
-        if (isHorizontal) {
-          whole = $(context).measure('width');
-        } else if (isVertical) {
-          whole = $(context).measure('height');
-        }
-      }
-
-      return (whole === null) ? 0 : whole * decimal;
-    }
-
-    return 0;
-  }
-
-  function toCSSPixels(number) {
-    if (Object.isString(number) && number.endsWith('px'))
-      return number;
-    return number + 'px';
-  }
-
-  function isDisplayed(element) {
-    while (element && element.parentNode) {
-      var display = element.getStyle('display');
-      if (display === 'none') {
-        return false;
-      }
-      element = $(element.parentNode);
-    }
-    return true;
-  }
-
-  var hasLayout = Prototype.K;
-  if ('currentStyle' in document.documentElement) {
-    hasLayout = function(element) {
-      if (!element.currentStyle.hasLayout) {
-        element.style.zoom = 1;
-      }
-      return element;
-    };
-  }
-
-  function cssNameFor(key) {
-    if (key.include('border')) key = key + '-width';
-    return key.camelize();
-  }
-
-  Element.Layout = Class.create(Hash, {
-    initialize: function($super, element, preCompute) {
-      $super();
-      this.element = $(element);
-
-      Element.Layout.PROPERTIES.each( function(property) {
-        this._set(property, null);
-      }, this);
-
-      if (preCompute) {
-        this._preComputing = true;
-        this._begin();
-        Element.Layout.PROPERTIES.each( this._compute, this );
-        this._end();
-        this._preComputing = false;
-      }
-    },
-
-    _set: function(property, value) {
-      return Hash.prototype.set.call(this, property, value);
-    },
-
-    set: function(property, value) {
-      throw "Properties of Element.Layout are read-only.";
-    },
-
-    get: function($super, property) {
-      var value = $super(property);
-      return value === null ? this._compute(property) : value;
-    },
-
-    _begin: function() {
-      if (this._isPrepared()) return;
-
-      var element = this.element;
-      if (isDisplayed(element)) {
-        this._setPrepared(true);
-        return;
-      }
-
-
-      var originalStyles = {
-        position:   element.style.position   || '',
-        width:      element.style.width      || '',
-        visibility: element.style.visibility || '',
-        display:    element.style.display    || ''
-      };
-
-      element.store('prototype_original_styles', originalStyles);
-
-      var position = getRawStyle(element, 'position'), width = element.offsetWidth;
-
-      if (width === 0 || width === null) {
-        element.style.display = 'block';
-        width = element.offsetWidth;
-      }
-
-      var context = (position === 'fixed') ? document.viewport :
-       element.parentNode;
-
-      var tempStyles = {
-        visibility: 'hidden',
-        display:    'block'
-      };
-
-      if (position !== 'fixed') tempStyles.position = 'absolute';
-
-      element.setStyle(tempStyles);
-
-      var positionedWidth = element.offsetWidth, newWidth;
-      if (width && (positionedWidth === width)) {
-        newWidth = getContentWidth(element, context);
-      } else if (position === 'absolute' || position === 'fixed') {
-        newWidth = getContentWidth(element, context);
-      } else {
-        var parent = element.parentNode, pLayout = $(parent).getLayout();
-
-        newWidth = pLayout.get('width') -
-         this.get('margin-left') -
-         this.get('border-left') -
-         this.get('padding-left') -
-         this.get('padding-right') -
-         this.get('border-right') -
-         this.get('margin-right');
-      }
-
-      element.setStyle({ width: newWidth + 'px' });
-
-      this._setPrepared(true);
-    },
-
-    _end: function() {
-      var element = this.element;
-      var originalStyles = element.retrieve('prototype_original_styles');
-      element.store('prototype_original_styles', null);
-      element.setStyle(originalStyles);
-      this._setPrepared(false);
-    },
-
-    _compute: function(property) {
-      var COMPUTATIONS = Element.Layout.COMPUTATIONS;
-      if (!(property in COMPUTATIONS)) {
-        throw "Property not found.";
-      }
-
-      return this._set(property, COMPUTATIONS[property].call(this, this.element));
-    },
-
-    _isPrepared: function() {
-      return this.element.retrieve('prototype_element_layout_prepared', false);
-    },
-
-    _setPrepared: function(bool) {
-      return this.element.store('prototype_element_layout_prepared', bool);
-    },
-
-    toObject: function() {
-      var args = $A(arguments);
-      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
-       args.join(' ').split(' ');
-      var obj = {};
-      keys.each( function(key) {
-        if (!Element.Layout.PROPERTIES.include(key)) return;
-        var value = this.get(key);
-        if (value != null) obj[key] = value;
-      }, this);
-      return obj;
-    },
-
-    toHash: function() {
-      var obj = this.toObject.apply(this, arguments);
-      return new Hash(obj);
-    },
-
-    toCSS: function() {
-      var args = $A(arguments);
-      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
-       args.join(' ').split(' ');
-      var css = {};
-
-      keys.each( function(key) {
-        if (!Element.Layout.PROPERTIES.include(key)) return;
-        if (Element.Layout.COMPOSITE_PROPERTIES.include(key)) return;
-
-        var value = this.get(key);
-        if (value != null) css[cssNameFor(key)] = value + 'px';
-      }, this);
-      return css;
-    },
-
-    inspect: function() {
-      return "#<Element.Layout>";
-    }
-  });
-
-  Object.extend(Element.Layout, {
-    PROPERTIES: $w('height width top left right bottom border-left border-right border-top border-bottom padding-left padding-right padding-top padding-bottom margin-top margin-bottom margin-left margin-right padding-box-width padding-box-height border-box-width border-box-height margin-box-width margin-box-height'),
-
-    COMPOSITE_PROPERTIES: $w('padding-box-width padding-box-height margin-box-width margin-box-height border-box-width border-box-height'),
-
-    COMPUTATIONS: {
-      'height': function(element) {
-        if (!this._preComputing) this._begin();
-
-        var bHeight = this.get('border-box-height');
-        if (bHeight <= 0) {
-          if (!this._preComputing) this._end();
-          return 0;
-        }
-
-        var bTop = this.get('border-top'),
-         bBottom = this.get('border-bottom');
-
-        var pTop = this.get('padding-top'),
-         pBottom = this.get('padding-bottom');
-
-        if (!this._preComputing) this._end();
-
-        return bHeight - bTop - bBottom - pTop - pBottom;
-      },
-
-      'width': function(element) {
-        if (!this._preComputing) this._begin();
-
-        var bWidth = this.get('border-box-width');
-        if (bWidth <= 0) {
-          if (!this._preComputing) this._end();
-          return 0;
-        }
-
-        var bLeft = this.get('border-left'),
-         bRight = this.get('border-right');
-
-        var pLeft = this.get('padding-left'),
-         pRight = this.get('padding-right');
-
-        if (!this._preComputing) this._end();
-        return bWidth - bLeft - bRight - pLeft - pRight;
-      },
-
-      'padding-box-height': function(element) {
-        var height = this.get('height'),
-         pTop = this.get('padding-top'),
-         pBottom = this.get('padding-bottom');
-
-        return height + pTop + pBottom;
-      },
-
-      'padding-box-width': function(element) {
-        var width = this.get('width'),
-         pLeft = this.get('padding-left'),
-         pRight = this.get('padding-right');
-
-        return width + pLeft + pRight;
-      },
-
-      'border-box-height': function(element) {
-        if (!this._preComputing) this._begin();
-        var height = element.offsetHeight;
-        if (!this._preComputing) this._end();
-        return height;
-      },
-
-      'border-box-width': function(element) {
-        if (!this._preComputing) this._begin();
-        var width = element.offsetWidth;
-        if (!this._preComputing) this._end();
-        return width;
-      },
-
-      'margin-box-height': function(element) {
-        var bHeight = this.get('border-box-height'),
-         mTop = this.get('margin-top'),
-         mBottom = this.get('margin-bottom');
-
-        if (bHeight <= 0) return 0;
-
-        return bHeight + mTop + mBottom;
-      },
-
-      'margin-box-width': function(element) {
-        var bWidth = this.get('border-box-width'),
-         mLeft = this.get('margin-left'),
-         mRight = this.get('margin-right');
-
-        if (bWidth <= 0) return 0;
-
-        return bWidth + mLeft + mRight;
-      },
-
-      'top': function(element) {
-        var offset = element.positionedOffset();
-        return offset.top;
-      },
-
-      'bottom': function(element) {
-        var offset = element.positionedOffset(),
-         parent = element.getOffsetParent(),
-         pHeight = parent.measure('height');
-
-        var mHeight = this.get('border-box-height');
-
-        return pHeight - mHeight - offset.top;
-      },
-
-      'left': function(element) {
-        var offset = element.positionedOffset();
-        return offset.left;
-      },
-
-      'right': function(element) {
-        var offset = element.positionedOffset(),
-         parent = element.getOffsetParent(),
-         pWidth = parent.measure('width');
-
-        var mWidth = this.get('border-box-width');
-
-        return pWidth - mWidth - offset.left;
-      },
-
-      'padding-top': function(element) {
-        return getPixelValue(element, 'paddingTop');
-      },
-
-      'padding-bottom': function(element) {
-        return getPixelValue(element, 'paddingBottom');
-      },
-
-      'padding-left': function(element) {
-        return getPixelValue(element, 'paddingLeft');
-      },
-
-      'padding-right': function(element) {
-        return getPixelValue(element, 'paddingRight');
-      },
-
-      'border-top': function(element) {
-        return getPixelValue(element, 'borderTopWidth');
-      },
-
-      'border-bottom': function(element) {
-        return getPixelValue(element, 'borderBottomWidth');
-      },
-
-      'border-left': function(element) {
-        return getPixelValue(element, 'borderLeftWidth');
-      },
-
-      'border-right': function(element) {
-        return getPixelValue(element, 'borderRightWidth');
-      },
-
-      'margin-top': function(element) {
-        return getPixelValue(element, 'marginTop');
-      },
-
-      'margin-bottom': function(element) {
-        return getPixelValue(element, 'marginBottom');
-      },
-
-      'margin-left': function(element) {
-        return getPixelValue(element, 'marginLeft');
-      },
-
-      'margin-right': function(element) {
-        return getPixelValue(element, 'marginRight');
-      }
-    }
-  });
-
-  if ('getBoundingClientRect' in document.documentElement) {
-    Object.extend(Element.Layout.COMPUTATIONS, {
-      'right': function(element) {
-        var parent = hasLayout(element.getOffsetParent());
-        var rect = element.getBoundingClientRect(),
-         pRect = parent.getBoundingClientRect();
-
-        return (pRect.right - rect.right).round();
-      },
-
-      'bottom': function(element) {
-        var parent = hasLayout(element.getOffsetParent());
-        var rect = element.getBoundingClientRect(),
-         pRect = parent.getBoundingClientRect();
-
-        return (pRect.bottom - rect.bottom).round();
-      }
-    });
-  }
-
-  Element.Offset = Class.create({
-    initialize: function(left, top) {
-      this.left = left.round();
-      this.top  = top.round();
-
-      this[0] = this.left;
-      this[1] = this.top;
-    },
-
-    relativeTo: function(offset) {
-      return new Element.Offset(
-        this.left - offset.left,
-        this.top  - offset.top
-      );
-    },
-
-    inspect: function() {
-      return "#<Element.Offset left: #{left} top: #{top}>".interpolate(this);
-    },
-
-    toString: function() {
-      return "[#{left}, #{top}]".interpolate(this);
-    },
-
-    toArray: function() {
-      return [this.left, this.top];
-    }
-  });
-
-  function getLayout(element, preCompute) {
-    return new Element.Layout(element, preCompute);
-  }
-
-  function measure(element, property) {
-    return $(element).getLayout().get(property);
-  }
-
-  function getHeight(element) {
-    return Element.getDimensions(element).height;
-  }
-
-  function getWidth(element) {
-    return Element.getDimensions(element).width;
-  }
-
-  function getDimensions(element) {
-    element = $(element);
-    var display = Element.getStyle(element, 'display');
-
-    if (display && display !== 'none') {
-      return { width: element.offsetWidth, height: element.offsetHeight };
-    }
-
-    var style = element.style;
-    var originalStyles = {
-      visibility: style.visibility,
-      position:   style.position,
-      display:    style.display
-    };
-
-    var newStyles = {
-      visibility: 'hidden',
-      display:    'block'
-    };
-
-    if (originalStyles.position !== 'fixed')
-      newStyles.position = 'absolute';
-
-    Element.setStyle(element, newStyles);
-
-    var dimensions = {
-      width:  element.offsetWidth,
-      height: element.offsetHeight
-    };
-
-    Element.setStyle(element, originalStyles);
-
-    return dimensions;
-  }
-
-  function getOffsetParent(element) {
-    element = $(element);
-
-    function selfOrBody(element) {
-      return isHtml(element) ? $(document.body) : $(element);
-    }
-
-    if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
-      return $(document.body);
-
-    var isInline = (Element.getStyle(element, 'display') === 'inline');
-    if (!isInline && element.offsetParent) return selfOrBody(element.offsetParent);
-
-    while ((element = element.parentNode) && element !== document.body) {
-      if (Element.getStyle(element, 'position') !== 'static') {
-        return selfOrBody(element);
-      }
-    }
-
-    return $(document.body);
-  }
-
-
-  function cumulativeOffset(element) {
-    element = $(element);
-    var valueT = 0, valueL = 0;
-    if (element.parentNode) {
-      do {
-        valueT += element.offsetTop  || 0;
-        valueL += element.offsetLeft || 0;
-        element = element.offsetParent;
-      } while (element);
-    }
-    return new Element.Offset(valueL, valueT);
-  }
-
-  function positionedOffset(element) {
-    element = $(element);
-
-    var layout = element.getLayout();
-
-    var valueT = 0, valueL = 0;
-    do {
-      valueT += element.offsetTop  || 0;
-      valueL += element.offsetLeft || 0;
-      element = element.offsetParent;
-      if (element) {
-        if (isBody(element)) break;
-        var p = Element.getStyle(element, 'position');
-        if (p !== 'static') break;
-      }
-    } while (element);
-
-    valueL -= layout.get('margin-left');
-    valueT -= layout.get('margin-top');
-
-    return new Element.Offset(valueL, valueT);
-  }
-
-  function cumulativeScrollOffset(element) {
-    var valueT = 0, valueL = 0;
-    do {
-      if (element === document.body) {
-        var bodyScrollNode = document.documentElement || document.body.parentNode || document.body;
-        valueT += !Object.isUndefined(window.pageYOffset) ? window.pageYOffset : bodyScrollNode.scrollTop || 0;
-        valueL += !Object.isUndefined(window.pageXOffset) ? window.pageXOffset : bodyScrollNode.scrollLeft || 0;
-        break;
-      } else {
-        valueT += element.scrollTop  || 0;
-        valueL += element.scrollLeft || 0;
-        element = element.parentNode;
-      }
-    } while (element);
-    return new Element.Offset(valueL, valueT);
-  }
-
-  function viewportOffset(forElement) {
-    var valueT = 0, valueL = 0, docBody = document.body;
-
-    forElement = $(forElement);
-    var element = forElement;
-    do {
-      valueT += element.offsetTop  || 0;
-      valueL += element.offsetLeft || 0;
-      if (element.offsetParent == docBody &&
-        Element.getStyle(element, 'position') == 'absolute') break;
-    } while (element = element.offsetParent);
-
-    element = forElement;
-    do {
-      if (element != docBody) {
-        valueT -= element.scrollTop  || 0;
-        valueL -= element.scrollLeft || 0;
-      }
-    } while (element = element.parentNode);
-    return new Element.Offset(valueL, valueT);
-  }
-
-  function absolutize(element) {
-    element = $(element);
-
-    if (Element.getStyle(element, 'position') === 'absolute') {
-      return element;
-    }
-
-    var offsetParent = getOffsetParent(element);
-    var eOffset = element.viewportOffset(),
-     pOffset = offsetParent.viewportOffset();
-
-    var offset = eOffset.relativeTo(pOffset);
-    var layout = element.getLayout();
-
-    element.store('prototype_absolutize_original_styles', {
-      position: element.getStyle('position'),
-      left:     element.getStyle('left'),
-      top:      element.getStyle('top'),
-      width:    element.getStyle('width'),
-      height:   element.getStyle('height')
-    });
-
-    element.setStyle({
-      position: 'absolute',
-      top:    offset.top + 'px',
-      left:   offset.left + 'px',
-      width:  layout.get('width') + 'px',
-      height: layout.get('height') + 'px'
-    });
-
-    return element;
-  }
-
-  function relativize(element) {
-    element = $(element);
-    if (Element.getStyle(element, 'position') === 'relative') {
-      return element;
-    }
-
-    var originalStyles =
-     element.retrieve('prototype_absolutize_original_styles');
-
-    if (originalStyles) element.setStyle(originalStyles);
-    return element;
-  }
-
-
-  function scrollTo(element) {
-    element = $(element);
-    var pos = Element.cumulativeOffset(element);
-    window.scrollTo(pos.left, pos.top);
-    return element;
-  }
-
-
-  function makePositioned(element) {
-    element = $(element);
-    var position = Element.getStyle(element, 'position'), styles = {};
-    if (position === 'static' || !position) {
-      styles.position = 'relative';
-      if (Prototype.Browser.Opera) {
-        styles.top  = 0;
-        styles.left = 0;
-      }
-      Element.setStyle(element, styles);
-      Element.store(element, 'prototype_made_positioned', true);
-    }
-    return element;
-  }
-
-  function undoPositioned(element) {
-    element = $(element);
-    var storage = Element.getStorage(element),
-     madePositioned = storage.get('prototype_made_positioned');
-
-    if (madePositioned) {
-      storage.unset('prototype_made_positioned');
-      Element.setStyle(element, {
-        position: '',
-        top:      '',
-        bottom:   '',
-        left:     '',
-        right:    ''
-      });
-    }
-    return element;
-  }
-
-  function makeClipping(element) {
-    element = $(element);
-
-    var storage = Element.getStorage(element),
-     madeClipping = storage.get('prototype_made_clipping');
-
-    if (Object.isUndefined(madeClipping)) {
-      var overflow = Element.getStyle(element, 'overflow');
-      storage.set('prototype_made_clipping', overflow);
-      if (overflow !== 'hidden')
-        element.style.overflow = 'hidden';
-    }
-
-    return element;
-  }
-
-  function undoClipping(element) {
-    element = $(element);
-    var storage = Element.getStorage(element),
-     overflow = storage.get('prototype_made_clipping');
-
-    if (!Object.isUndefined(overflow)) {
-      storage.unset('prototype_made_clipping');
-      element.style.overflow = overflow || '';
-    }
-
-    return element;
-  }
-
-  function clonePosition(element, source, options) {
-    options = Object.extend({
-      setLeft:    true,
-      setTop:     true,
-      setWidth:   true,
-      setHeight:  true,
-      offsetTop:  0,
-      offsetLeft: 0
-    }, options || {});
-
-    var docEl = document.documentElement;
-
-    source  = $(source);
-    element = $(element);
-    var p, delta, layout, styles = {};
-
-    if (options.setLeft || options.setTop) {
-      p = Element.viewportOffset(source);
-      delta = [0, 0];
-      if (Element.getStyle(element, 'position') === 'absolute') {
-        var parent = Element.getOffsetParent(element);
-        if (parent !== document.body) delta = Element.viewportOffset(parent);
-      }
-    }
-
-    function pageScrollXY() {
-      var x = 0, y = 0;
-      if (Object.isNumber(window.pageXOffset)) {
-        x = window.pageXOffset;
-        y = window.pageYOffset;
-      } else if (document.body && (document.body.scrollLeft || document.body.scrollTop)) {
-        x = document.body.scrollLeft;
-        y = document.body.scrollTop;
-      } else if (docEl && (docEl.scrollLeft || docEl.scrollTop)) {
-        x = docEl.scrollLeft;
-        y = docEl.scrollTop;
-      }
-      return { x: x, y: y };
-    }
-
-    var pageXY = pageScrollXY();
-
-
-    if (options.setWidth || options.setHeight) {
-      layout = Element.getLayout(source);
-    }
-
-    if (options.setLeft)
-      styles.left = (p[0] + pageXY.x - delta[0] + options.offsetLeft) + 'px';
-    if (options.setTop)
-      styles.top  = (p[1] + pageXY.y - delta[1] + options.offsetTop)  + 'px';
-
-    var currentLayout = element.getLayout();
-
-    if (options.setWidth) {
-      styles.width = layout.get('width')  + 'px';
-    }
-    if (options.setHeight) {
-      styles.height = layout.get('height') + 'px';
-    }
-
-    return Element.setStyle(element, styles);
-  }
-
-
-  if (Prototype.Browser.IE) {
-    getOffsetParent = getOffsetParent.wrap(
-      function(proceed, element) {
-        element = $(element);
-
-        if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
-          return $(document.body);
-
-        var position = element.getStyle('position');
-        if (position !== 'static') return proceed(element);
-
-        element.setStyle({ position: 'relative' });
-        var value = proceed(element);
-        element.setStyle({ position: position });
-        return value;
-      }
-    );
-
-    positionedOffset = positionedOffset.wrap(function(proceed, element) {
-      element = $(element);
-      if (!element.parentNode) return new Element.Offset(0, 0);
-      var position = element.getStyle('position');
-      if (position !== 'static') return proceed(element);
-
-      var offsetParent = element.getOffsetParent();
-      if (offsetParent && offsetParent.getStyle('position') === 'fixed')
-        hasLayout(offsetParent);
-
-      element.setStyle({ position: 'relative' });
-      var value = proceed(element);
-      element.setStyle({ position: position });
-      return value;
-    });
-  } else if (Prototype.Browser.Webkit) {
-    cumulativeOffset = function(element) {
-      element = $(element);
-      var valueT = 0, valueL = 0;
-      do {
-        valueT += element.offsetTop  || 0;
-        valueL += element.offsetLeft || 0;
-        if (element.offsetParent == document.body) {
-          if (Element.getStyle(element, 'position') == 'absolute') break;
-        }
-
-        element = element.offsetParent;
-      } while (element);
-
-      return new Element.Offset(valueL, valueT);
-    };
-  }
-
-
-  Element.addMethods({
-    getLayout:              getLayout,
-    measure:                measure,
-    getWidth:               getWidth,
-    getHeight:              getHeight,
-    getDimensions:          getDimensions,
-    getOffsetParent:        getOffsetParent,
-    cumulativeOffset:       cumulativeOffset,
-    positionedOffset:       positionedOffset,
-    cumulativeScrollOffset: cumulativeScrollOffset,
-    viewportOffset:         viewportOffset,
-    absolutize:             absolutize,
-    relativize:             relativize,
-    scrollTo:               scrollTo,
-    makePositioned:         makePositioned,
-    undoPositioned:         undoPositioned,
-    makeClipping:           makeClipping,
-    undoClipping:           undoClipping,
-    clonePosition:          clonePosition
-  });
-
-  function isBody(element) {
-    return element.nodeName.toUpperCase() === 'BODY';
-  }
-
-  function isHtml(element) {
-    return element.nodeName.toUpperCase() === 'HTML';
-  }
-
-  function isDocument(element) {
-    return element.nodeType === Node.DOCUMENT_NODE;
-  }
-
-  function isDetached(element) {
-    return element !== document.body &&
-     !Element.descendantOf(element, document.body);
-  }
-
-  if ('getBoundingClientRect' in document.documentElement) {
-    Element.addMethods({
-      viewportOffset: function(element) {
-        element = $(element);
-        if (isDetached(element)) return new Element.Offset(0, 0);
-
-        var rect = element.getBoundingClientRect(),
-         docEl = document.documentElement;
-        return new Element.Offset(rect.left - docEl.clientLeft,
-         rect.top - docEl.clientTop);
-      }
-    });
-  }
-
-
-})();
-
-(function() {
-
-  var IS_OLD_OPERA = Prototype.Browser.Opera &&
-   (window.parseFloat(window.opera.version()) < 9.5);
-  var ROOT = null;
-  function getRootElement() {
-    if (ROOT) return ROOT;
-    ROOT = IS_OLD_OPERA ? document.body : document.documentElement;
-    return ROOT;
-  }
-
-  function getDimensions() {
-    return { width: this.getWidth(), height: this.getHeight() };
-  }
-
-  function getWidth() {
-    return getRootElement().clientWidth;
-  }
-
-  function getHeight() {
-    return getRootElement().clientHeight;
-  }
-
-  function getScrollOffsets() {
-    var x = window.pageXOffset || document.documentElement.scrollLeft ||
-     document.body.scrollLeft;
-    var y = window.pageYOffset || document.documentElement.scrollTop ||
-     document.body.scrollTop;
-
-    return new Element.Offset(x, y);
-  }
-
-  document.viewport = {
-    getDimensions:    getDimensions,
-    getWidth:         getWidth,
-    getHeight:        getHeight,
-    getScrollOffsets: getScrollOffsets
-  };
-
-})();
-window.$$ = function() {
-  var expression = $A(arguments).join(', ');
-  return Prototype.Selector.select(expression, document);
-};
-
-Prototype.Selector = (function() {
-
-  function select() {
-    throw new Error('Method "Prototype.Selector.select" must be defined.');
-  }
-
-  function match() {
-    throw new Error('Method "Prototype.Selector.match" must be defined.');
-  }
-
-  function find(elements, expression, index) {
-    index = index || 0;
-    var match = Prototype.Selector.match, length = elements.length, matchIndex = 0, i;
-
-    for (i = 0; i < length; i++) {
-      if (match(elements[i], expression) && index == matchIndex++) {
-        return Element.extend(elements[i]);
-      }
-    }
-  }
-
-  function extendElements(elements) {
-    for (var i = 0, length = elements.length; i < length; i++) {
-      Element.extend(elements[i]);
-    }
-    return elements;
-  }
-
-
-  var K = Prototype.K;
-
-  return {
-    select: select,
-    match: match,
-    find: find,
-    extendElements: (Element.extend === K) ? K : extendElements,
-    extendElement: Element.extend
-  };
-})();
-Prototype._original_property = window.Sizzle;
-
-;(function () {
-  function fakeDefine(fn) {
-    Prototype._actual_sizzle = fn();
-  }
-  fakeDefine.amd = true;
-
-  if (typeof define !== 'undefined' && define.amd) {
-    Prototype._original_define = define;
-    Prototype._actual_sizzle = null;
-    window.define = fakeDefine;
-  }
-})();
-
-/*!
- * Sizzle CSS Selector Engine v1.10.18
- * http://sizzlejs.com/
- *
- * Copyright 2013 jQuery Foundation, Inc. and other contributors
- * Released under the MIT license
- * http://jquery.org/license
- *
- * Date: 2014-02-05
- */
-(function( window ) {
-
-var i,
-	support,
-	Expr,
-	getText,
-	isXML,
-	compile,
-	select,
-	outermostContext,
-	sortInput,
-	hasDuplicate,
-
-	setDocument,
-	document,
-	docElem,
-	documentIsHTML,
-	rbuggyQSA,
-	rbuggyMatches,
-	matches,
-	contains,
-
-	expando = "sizzle" + -(new Date()),
-	preferredDoc = window.document,
-	dirruns = 0,
-	done = 0,
-	classCache = createCache(),
-	tokenCache = createCache(),
-	compilerCache = createCache(),
-	sortOrder = function( a, b ) {
-		if ( a === b ) {
-			hasDuplicate = true;
-		}
-		return 0;
-	},
-
-	strundefined = typeof undefined,
-	MAX_NEGATIVE = 1 << 31,
-
-	hasOwn = ({}).hasOwnProperty,
-	arr = [],
-	pop = arr.pop,
-	push_native = arr.push,
-	push = arr.push,
-	slice = arr.slice,
-	indexOf = arr.indexOf || function( elem ) {
-		var i = 0,
-			len = this.length;
-		for ( ; i < len; i++ ) {
-			if ( this[i] === elem ) {
-				return i;
-			}
-		}
-		return -1;
-	},
-
-	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
-
-
-	whitespace = "[\\x20\\t\\r\\n\\f]",
-	characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
-
-	identifier = characterEncoding.replace( "w", "w#" ),
-
-	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
-		"*(?:([*^$|!~]?=)" + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",
-
-	pseudos = ":(" + characterEncoding + ")(?:\$((['\"])((?:\\\\.|[^\\\\])*?)\\3|((?:\\\\.|[^\\\\()[\\]]|" + attributes.replace( 3, 8 ) + ")*)|.*)\$|)",
-
-	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
-
-	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
-	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
-
-	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
-
-	rpseudo = new RegExp( pseudos ),
-	ridentifier = new RegExp( "^" + identifier + "$" ),
-
-	matchExpr = {
-		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
-		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
-		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
-		"ATTR": new RegExp( "^" + attributes ),
-		"PSEUDO": new RegExp( "^" + pseudos ),
-		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\$" + whitespace +
-			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
-			"*(\\d+)|))" + whitespace + "*\$|)", "i" ),
-		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
-		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\$" +
-			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\$|)(?=[^-]|$)", "i" )
-	},
-
-	rinputs = /^(?:input|select|textarea|button)$/i,
-	rheader = /^h\d$/i,
-
-	rnative = /^[^{]+\{\s*\[native \w/,
-
-	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
-
-	rsibling = /[+~]/,
-	rescape = /'|\\/g,
-
-	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
-	funescape = function( _, escaped, escapedWhitespace ) {
-		var high = "0x" + escaped - 0x10000;
-		return high !== high || escapedWhitespace ?
-			escaped :
-			high < 0 ?
-				String.fromCharCode( high + 0x10000 ) :
-				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
-	};
-
-try {
-	push.apply(
-		(arr = slice.call( preferredDoc.childNodes )),
-		preferredDoc.childNodes
-	);
-	arr[ preferredDoc.childNodes.length ].nodeType;
-} catch ( e ) {
-	push = { apply: arr.length ?
-
-		function( target, els ) {
-			push_native.apply( target, slice.call(els) );
-		} :
-
-		function( target, els ) {
-			var j = target.length,
-				i = 0;
-			while ( (target[j++] = els[i++]) ) {}
-			target.length = j - 1;
-		}
-	};
-}
-
-function Sizzle( selector, context, results, seed ) {
-	var match, elem, m, nodeType,
-		i, groups, old, nid, newContext, newSelector;
-
-	if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
-		setDocument( context );
-	}
-
-	context = context || document;
-	results = results || [];
-
-	if ( !selector || typeof selector !== "string" ) {
-		return results;
-	}
-
-	if ( (nodeType = context.nodeType) !== 1 && nodeType !== 9 ) {
-		return [];
-	}
-
-	if ( documentIsHTML && !seed ) {
-
-		if ( (match = rquickExpr.exec( selector )) ) {
-			if ( (m = match[1]) ) {
-				if ( nodeType === 9 ) {
-					elem = context.getElementById( m );
-					if ( elem && elem.parentNode ) {
-						if ( elem.id === m ) {
-							results.push( elem );
-							return results;
-						}
-					} else {
-						return results;
-					}
-				} else {
-					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
-						contains( context, elem ) && elem.id === m ) {
-						results.push( elem );
-						return results;
-					}
-				}
-
-			} else if ( match[2] ) {
-				push.apply( results, context.getElementsByTagName( selector ) );
-				return results;
-
-			} else if ( (m = match[3]) && support.getElementsByClassName && context.getElementsByClassName ) {
-				push.apply( results, context.getElementsByClassName( m ) );
-				return results;
-			}
-		}
-
-		if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
-			nid = old = expando;
-			newContext = context;
-			newSelector = nodeType === 9 && selector;
-
-			if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
-				groups = tokenize( selector );
-
-				if ( (old = context.getAttribute("id")) ) {
-					nid = old.replace( rescape, "\\$&" );
-				} else {
-					context.setAttribute( "id", nid );
-				}
-				nid = "[id='" + nid + "'] ";
-
-				i = groups.length;
-				while ( i-- ) {
-					groups[i] = nid + toSelector( groups[i] );
-				}
-				newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
-				newSelector = groups.join(",");
-			}
-
-			if ( newSelector ) {
-				try {
-					push.apply( results,
-						newContext.querySelectorAll( newSelector )
-					);
-					return results;
-				} catch(qsaError) {
-				} finally {
-					if ( !old ) {
-						context.removeAttribute("id");
-					}
-				}
-			}
-		}
-	}
-
-	return select( selector.replace( rtrim, "$1" ), context, results, seed );
-}
-
-/**
- * Create key-value caches of limited size
- * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
- *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
- *	deleting the oldest entry
- */
-function createCache() {
-	var keys = [];
-
-	function cache( key, value ) {
-		if ( keys.push( key + " " ) > Expr.cacheLength ) {
-			delete cache[ keys.shift() ];
-		}
-		return (cache[ key + " " ] = value);
-	}
-	return cache;
-}
-
-/**
- * Mark a function for special use by Sizzle
- * @param {Function} fn The function to mark
- */
-function markFunction( fn ) {
-	fn[ expando ] = true;
-	return fn;
-}
-
-/**
- * Support testing using an element
- * @param {Function} fn Passed the created div and expects a boolean result
- */
-function assert( fn ) {
-	var div = document.createElement("div");
-
-	try {
-		return !!fn( div );
-	} catch (e) {
-		return false;
-	} finally {
-		if ( div.parentNode ) {
-			div.parentNode.removeChild( div );
-		}
-		div = null;
-	}
-}
-
-/**
- * Adds the same handler for all of the specified attrs
- * @param {String} attrs Pipe-separated list of attributes
- * @param {Function} handler The method that will be applied
- */
-function addHandle( attrs, handler ) {
-	var arr = attrs.split("|"),
-		i = attrs.length;
-
-	while ( i-- ) {
-		Expr.attrHandle[ arr[i] ] = handler;
-	}
-}
-
-/**
- * Checks document order of two siblings
- * @param {Element} a
- * @param {Element} b
- * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
- */
-function siblingCheck( a, b ) {
-	var cur = b && a,
-		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
-			( ~b.sourceIndex || MAX_NEGATIVE ) -
-			( ~a.sourceIndex || MAX_NEGATIVE );
-
-	if ( diff ) {
-		return diff;
-	}
-
-	if ( cur ) {
-		while ( (cur = cur.nextSibling) ) {
-			if ( cur === b ) {
-				return -1;
-			}
-		}
-	}
-
-	return a ? 1 : -1;
-}
-
-/**
- * Returns a function to use in pseudos for input types
- * @param {String} type
- */
-function createInputPseudo( type ) {
-	return function( elem ) {
-		var name = elem.nodeName.toLowerCase();
-		return name === "input" && elem.type === type;
-	};
-}
-
-/**
- * Returns a function to use in pseudos for buttons
- * @param {String} type
- */
-function createButtonPseudo( type ) {
-	return function( elem ) {
-		var name = elem.nodeName.toLowerCase();
-		return (name === "input" || name === "button") && elem.type === type;
-	};
-}
-
-/**
- * Returns a function to use in pseudos for positionals
- * @param {Function} fn
- */
-function createPositionalPseudo( fn ) {
-	return markFunction(function( argument ) {
-		argument = +argument;
-		return markFunction(function( seed, matches ) {
-			var j,
-				matchIndexes = fn( [], seed.length, argument ),
-				i = matchIndexes.length;
-
-			while ( i-- ) {
-				if ( seed[ (j = matchIndexes[i]) ] ) {
-					seed[j] = !(matches[j] = seed[j]);
-				}
-			}
-		});
-	});
-}
-
-/**
- * Checks a node for validity as a Sizzle context
- * @param {Element|Object=} context
- * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
- */
-function testContext( context ) {
-	return context && typeof context.getElementsByTagName !== strundefined && context;
-}
-
-support = Sizzle.support = {};
-
-/**
- * Detects XML nodes
- * @param {Element|Object} elem An element or a document
- * @returns {Boolean} True iff elem is a non-HTML XML node
- */
-isXML = Sizzle.isXML = function( elem ) {
-	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
-	return documentElement ? documentElement.nodeName !== "HTML" : false;
-};
-
-/**
- * Sets document-related variables once based on the current document
- * @param {Element|Object} [doc] An element or document object to use to set the document
- * @returns {Object} Returns the current document
- */
-setDocument = Sizzle.setDocument = function( node ) {
-	var hasCompare,
-		doc = node ? node.ownerDocument || node : preferredDoc,
-		parent = doc.defaultView;
-
-	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
-		return document;
-	}
-
-	document = doc;
-	docElem = doc.documentElement;
-
-	documentIsHTML = !isXML( doc );
-
-	if ( parent && parent !== parent.top ) {
-		if ( parent.addEventListener ) {
-			parent.addEventListener( "unload", function() {
-				setDocument();
-			}, false );
-		} else if ( parent.attachEvent ) {
-			parent.attachEvent( "onunload", function() {
-				setDocument();
-			});
-		}
-	}
-
-	/* Attributes
-	---------------------------------------------------------------------- */
-
-	support.attributes = assert(function( div ) {
-		div.className = "i";
-		return !div.getAttribute("className");
-	});
-
-	/* getElement(s)By*
-	---------------------------------------------------------------------- */
-
-	support.getElementsByTagName = assert(function( div ) {
-		div.appendChild( doc.createComment("") );
-		return !div.getElementsByTagName("*").length;
-	});
-
-	support.getElementsByClassName = rnative.test( doc.getElementsByClassName ) && assert(function( div ) {
-		div.innerHTML = "<div class='a'></div><div class='a i'></div>";
-
-		div.firstChild.className = "i";
-		return div.getElementsByClassName("i").length === 2;
-	});
-
-	support.getById = assert(function( div ) {
-		docElem.appendChild( div ).id = expando;
-		return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
-	});
-
-	if ( support.getById ) {
-		Expr.find["ID"] = function( id, context ) {
-			if ( typeof context.getElementById !== strundefined && documentIsHTML ) {
-				var m = context.getElementById( id );
-				return m && m.parentNode ? [m] : [];
-			}
-		};
-		Expr.filter["ID"] = function( id ) {
-			var attrId = id.replace( runescape, funescape );
-			return function( elem ) {
-				return elem.getAttribute("id") === attrId;
-			};
-		};
-	} else {
-		delete Expr.find["ID"];
-
-		Expr.filter["ID"] =  function( id ) {
-			var attrId = id.replace( runescape, funescape );
-			return function( elem ) {
-				var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
-				return node && node.value === attrId;
-			};
-		};
-	}
-
-	Expr.find["TAG"] = support.getElementsByTagName ?
-		function( tag, context ) {
-			if ( typeof context.getElementsByTagName !== strundefined ) {
-				return context.getElementsByTagName( tag );
-			}
-		} :
-		function( tag, context ) {
-			var elem,
-				tmp = [],
-				i = 0,
-				results = context.getElementsByTagName( tag );
-
-			if ( tag === "*" ) {
-				while ( (elem = results[i++]) ) {
-					if ( elem.nodeType === 1 ) {
-						tmp.push( elem );
-					}
-				}
-
-				return tmp;
-			}
-			return results;
-		};
-
-	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
-		if ( typeof context.getElementsByClassName !== strundefined && documentIsHTML ) {
-			return context.getElementsByClassName( className );
-		}
-	};
-
-	/* QSA/matchesSelector
-	---------------------------------------------------------------------- */
-
-
-	rbuggyMatches = [];
-
-	rbuggyQSA = [];
-
-	if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
-		assert(function( div ) {
-			div.innerHTML = "<select t=''><option selected=''></option></select>";
-
-			if ( div.querySelectorAll("[t^='']").length ) {
-				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
-			}
-
-			if ( !div.querySelectorAll("[selected]").length ) {
-				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
-			}
-
-			if ( !div.querySelectorAll(":checked").length ) {
-				rbuggyQSA.push(":checked");
-			}
-		});
-
-		assert(function( div ) {
-			var input = doc.createElement("input");
-			input.setAttribute( "type", "hidden" );
-			div.appendChild( input ).setAttribute( "name", "D" );
-
-			if ( div.querySelectorAll("[name=d]").length ) {
-				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
-			}
-
-			if ( !div.querySelectorAll(":enabled").length ) {
-				rbuggyQSA.push( ":enabled", ":disabled" );
-			}
-
-			div.querySelectorAll("*,:x");
-			rbuggyQSA.push(",.*:");
-		});
-	}
-
-	if ( (support.matchesSelector = rnative.test( (matches = docElem.webkitMatchesSelector ||
-		docElem.mozMatchesSelector ||
-		docElem.oMatchesSelector ||
-		docElem.msMatchesSelector) )) ) {
-
-		assert(function( div ) {
-			support.disconnectedMatch = matches.call( div, "div" );
-
-			matches.call( div, "[s!='']:x" );
-			rbuggyMatches.push( "!=", pseudos );
-		});
-	}
-
-	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
-	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
-
-	/* Contains
-	---------------------------------------------------------------------- */
-	hasCompare = rnative.test( docElem.compareDocumentPosition );
-
-	contains = hasCompare || rnative.test( docElem.contains ) ?
-		function( a, b ) {
-			var adown = a.nodeType === 9 ? a.documentElement : a,
-				bup = b && b.parentNode;
-			return a === bup || !!( bup && bup.nodeType === 1 && (
-				adown.contains ?
-					adown.contains( bup ) :
-					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
-			));
-		} :
-		function( a, b ) {
-			if ( b ) {
-				while ( (b = b.parentNode) ) {
-					if ( b === a ) {
-						return true;
-					}
-				}
-			}
-			return false;
-		};
-
-	/* Sorting
-	---------------------------------------------------------------------- */
-
-	sortOrder = hasCompare ?
-	function( a, b ) {
-
-		if ( a === b ) {
-			hasDuplicate = true;
-			return 0;
-		}
-
-		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
-		if ( compare ) {
-			return compare;
-		}
-
-		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
-			a.compareDocumentPosition( b ) :
-
-			1;
-
-		if ( compare & 1 ||
-			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
-
-			if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
-				return -1;
-			}
-			if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
-				return 1;
-			}
-
-			return sortInput ?
-				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
-				0;
-		}
-
-		return compare & 4 ? -1 : 1;
-	} :
-	function( a, b ) {
-		if ( a === b ) {
-			hasDuplicate = true;
-			return 0;
-		}
-
-		var cur,
-			i = 0,
-			aup = a.parentNode,
-			bup = b.parentNode,
-			ap = [ a ],
-			bp = [ b ];
-
-		if ( !aup || !bup ) {
-			return a === doc ? -1 :
-				b === doc ? 1 :
-				aup ? -1 :
-				bup ? 1 :
-				sortInput ?
-				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
-				0;
-
-		} else if ( aup === bup ) {
-			return siblingCheck( a, b );
-		}
-
-		cur = a;
-		while ( (cur = cur.parentNode) ) {
-			ap.unshift( cur );
-		}
-		cur = b;
-		while ( (cur = cur.parentNode) ) {
-			bp.unshift( cur );
-		}
-
-		while ( ap[i] === bp[i] ) {
-			i++;
-		}
-
-		return i ?
-			siblingCheck( ap[i], bp[i] ) :
-
-			ap[i] === preferredDoc ? -1 :
-			bp[i] === preferredDoc ? 1 :
-			0;
-	};
-
-	return doc;
-};
-
-Sizzle.matches = function( expr, elements ) {
-	return Sizzle( expr, null, null, elements );
-};
-
-Sizzle.matchesSelector = function( elem, expr ) {
-	if ( ( elem.ownerDocument || elem ) !== document ) {
-		setDocument( elem );
-	}
-
-	expr = expr.replace( rattributeQuotes, "='$1']" );
-
-	if ( support.matchesSelector && documentIsHTML &&
-		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
-		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
-
-		try {
-			var ret = matches.call( elem, expr );
-
-			if ( ret || support.disconnectedMatch ||
-					elem.document && elem.document.nodeType !== 11 ) {
-				return ret;
-			}
-		} catch(e) {}
-	}
-
-	return Sizzle( expr, document, null, [elem] ).length > 0;
-};
-
-Sizzle.contains = function( context, elem ) {
-	if ( ( context.ownerDocument || context ) !== document ) {
-		setDocument( context );
-	}
-	return contains( context, elem );
-};
-
-Sizzle.attr = function( elem, name ) {
-	if ( ( elem.ownerDocument || elem ) !== document ) {
-		setDocument( elem );
-	}
-
-	var fn = Expr.attrHandle[ name.toLowerCase() ],
-		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
-			fn( elem, name, !documentIsHTML ) :
-			undefined;
-
-	return val !== undefined ?
-		val :
-		support.attributes || !documentIsHTML ?
-			elem.getAttribute( name ) :
-			(val = elem.getAttributeNode(name)) && val.specified ?
-				val.value :
-				null;
-};
-
-Sizzle.error = function( msg ) {
-	throw new Error( "Syntax error, unrecognized expression: " + msg );
-};
-
-/**
- * Document sorting and removing duplicates
- * @param {ArrayLike} results
- */
-Sizzle.uniqueSort = function( results ) {
-	var elem,
-		duplicates = [],
-		j = 0,
-		i = 0;
-
-	hasDuplicate = !support.detectDuplicates;
-	sortInput = !support.sortStable && results.slice( 0 );
-	results.sort( sortOrder );
-
-	if ( hasDuplicate ) {
-		while ( (elem = results[i++]) ) {
-			if ( elem === results[ i ] ) {
-				j = duplicates.push( i );
-			}
-		}
-		while ( j-- ) {
-			results.splice( duplicates[ j ], 1 );
-		}
-	}
-
-	sortInput = null;
-
-	return results;
-};
-
-/**
- * Utility function for retrieving the text value of an array of DOM nodes
- * @param {Array|Element} elem
- */
-getText = Sizzle.getText = function( elem ) {
-	var node,
-		ret = "",
-		i = 0,
-		nodeType = elem.nodeType;
-
-	if ( !nodeType ) {
-		while ( (node = elem[i++]) ) {
-			ret += getText( node );
-		}
-	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
-		if ( typeof elem.textContent === "string" ) {
-			return elem.textContent;
-		} else {
-			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
-				ret += getText( elem );
-			}
-		}
-	} else if ( nodeType === 3 || nodeType === 4 ) {
-		return elem.nodeValue;
-	}
-
-	return ret;
-};
-
-Expr = Sizzle.selectors = {
-
-	cacheLength: 50,
-
-	createPseudo: markFunction,
-
-	match: matchExpr,
-
-	attrHandle: {},
-
-	find: {},
-
-	relative: {
-		">": { dir: "parentNode", first: true },
-		" ": { dir: "parentNode" },
-		"+": { dir: "previousSibling", first: true },
-		"~": { dir: "previousSibling" }
-	},
-
-	preFilter: {
-		"ATTR": function( match ) {
-			match[1] = match[1].replace( runescape, funescape );
-
-			match[3] = ( match[4] || match[5] || "" ).replace( runescape, funescape );
-
-			if ( match[2] === "~=" ) {
-				match[3] = " " + match[3] + " ";
-			}
-
-			return match.slice( 0, 4 );
-		},
-
-		"CHILD": function( match ) {
-			/* matches from matchExpr["CHILD"]
-				1 type (only|nth|...)
-				2 what (child|of-type)
-				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
-				4 xn-component of xn+y argument ([+-]?\d*n|)
-				5 sign of xn-component
-				6 x of xn-component
-				7 sign of y-component
-				8 y of y-component
-			*/
-			match[1] = match[1].toLowerCase();
-
-			if ( match[1].slice( 0, 3 ) === "nth" ) {
-				if ( !match[3] ) {
-					Sizzle.error( match[0] );
-				}
-
-				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
-				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
-
-			} else if ( match[3] ) {
-				Sizzle.error( match[0] );
-			}
-
-			return match;
-		},
-
-		"PSEUDO": function( match ) {
-			var excess,
-				unquoted = !match[5] && match[2];
-
-			if ( matchExpr["CHILD"].test( match[0] ) ) {
-				return null;
-			}
-
-			if ( match[3] && match[4] !== undefined ) {
-				match[2] = match[4];
-
-			} else if ( unquoted && rpseudo.test( unquoted ) &&
-				(excess = tokenize( unquoted, true )) &&
-				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
-
-				match[0] = match[0].slice( 0, excess );
-				match[2] = unquoted.slice( 0, excess );
-			}
-
-			return match.slice( 0, 3 );
-		}
-	},
-
-	filter: {
-
-		"TAG": function( nodeNameSelector ) {
-			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
-			return nodeNameSelector === "*" ?
-				function() { return true; } :
-				function( elem ) {
-					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
-				};
-		},
-
-		"CLASS": function( className ) {
-			var pattern = classCache[ className + " " ];
-
-			return pattern ||
-				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
-				classCache( className, function( elem ) {
-					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== strundefined && elem.getAttribute("class") || "" );
-				});
-		},
-
-		"ATTR": function( name, operator, check ) {
-			return function( elem ) {
-				var result = Sizzle.attr( elem, name );
-
-				if ( result == null ) {
-					return operator === "!=";
-				}
-				if ( !operator ) {
-					return true;
-				}
-
-				result += "";
-
-				return operator === "=" ? result === check :
-					operator === "!=" ? result !== check :
-					operator === "^=" ? check && result.indexOf( check ) === 0 :
-					operator === "*=" ? check && result.indexOf( check ) > -1 :
-					operator === "$=" ? check && result.slice( -check.length ) === check :
-					operator === "~=" ? ( " " + result + " " ).indexOf( check ) > -1 :
-					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
-					false;
-			};
-		},
-
-		"CHILD": function( type, what, argument, first, last ) {
-			var simple = type.slice( 0, 3 ) !== "nth",
-				forward = type.slice( -4 ) !== "last",
-				ofType = what === "of-type";
-
-			return first === 1 && last === 0 ?
-
-				function( elem ) {
-					return !!elem.parentNode;
-				} :
-
-				function( elem, context, xml ) {
-					var cache, outerCache, node, diff, nodeIndex, start,
-						dir = simple !== forward ? "nextSibling" : "previousSibling",
-						parent = elem.parentNode,
-						name = ofType && elem.nodeName.toLowerCase(),
-						useCache = !xml && !ofType;
-
-					if ( parent ) {
-
-						if ( simple ) {
-							while ( dir ) {
-								node = elem;
-								while ( (node = node[ dir ]) ) {
-									if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
-										return false;
-									}
-								}
-								start = dir = type === "only" && !start && "nextSibling";
-							}
-							return true;
-						}
-
-						start = [ forward ? parent.firstChild : parent.lastChild ];
-
-						if ( forward && useCache ) {
-							outerCache = parent[ expando ] || (parent[ expando ] = {});
-							cache = outerCache[ type ] || [];
-							nodeIndex = cache[0] === dirruns && cache[1];
-							diff = cache[0] === dirruns && cache[2];
-							node = nodeIndex && parent.childNodes[ nodeIndex ];
-
-							while ( (node = ++nodeIndex && node && node[ dir ] ||
-
-								(diff = nodeIndex = 0) || start.pop()) ) {
-
-								if ( node.nodeType === 1 && ++diff && node === elem ) {
-									outerCache[ type ] = [ dirruns, nodeIndex, diff ];
-									break;
-								}
-							}
-
-						} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
-							diff = cache[1];
-
-						} else {
-							while ( (node = ++nodeIndex && node && node[ dir ] ||
-								(diff = nodeIndex = 0) || start.pop()) ) {
-
-								if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
-									if ( useCache ) {
-										(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
-									}
-
-									if ( node === elem ) {
-										break;
-									}
-								}
-							}
-						}
-
-						diff -= last;
-						return diff === first || ( diff % first === 0 && diff / first >= 0 );
-					}
-				};
-		},
-
-		"PSEUDO": function( pseudo, argument ) {
-			var args,
-				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
-					Sizzle.error( "unsupported pseudo: " + pseudo );
-
-			if ( fn[ expando ] ) {
-				return fn( argument );
-			}
-
-			if ( fn.length > 1 ) {
-				args = [ pseudo, pseudo, "", argument ];
-				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
-					markFunction(function( seed, matches ) {
-						var idx,
-							matched = fn( seed, argument ),
-							i = matched.length;
-						while ( i-- ) {
-							idx = indexOf.call( seed, matched[i] );
-							seed[ idx ] = !( matches[ idx ] = matched[i] );
-						}
-					}) :
-					function( elem ) {
-						return fn( elem, 0, args );
-					};
-			}
-
-			return fn;
-		}
-	},
-
-	pseudos: {
-		"not": markFunction(function( selector ) {
-			var input = [],
-				results = [],
-				matcher = compile( selector.replace( rtrim, "$1" ) );
-
-			return matcher[ expando ] ?
-				markFunction(function( seed, matches, context, xml ) {
-					var elem,
-						unmatched = matcher( seed, null, xml, [] ),
-						i = seed.length;
-
-					while ( i-- ) {
-						if ( (elem = unmatched[i]) ) {
-							seed[i] = !(matches[i] = elem);
-						}
-					}
-				}) :
-				function( elem, context, xml ) {
-					input[0] = elem;
-					matcher( input, null, xml, results );
-					return !results.pop();
-				};
-		}),
-
-		"has": markFunction(function( selector ) {
-			return function( elem ) {
-				return Sizzle( selector, elem ).length > 0;
-			};
-		}),
-
-		"contains": markFunction(function( text ) {
-			return function( elem ) {
-				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
-			};
-		}),
-
-		"lang": markFunction( function( lang ) {
-			if ( !ridentifier.test(lang || "") ) {
-				Sizzle.error( "unsupported lang: " + lang );
-			}
-			lang = lang.replace( runescape, funescape ).toLowerCase();
-			return function( elem ) {
-				var elemLang;
-				do {
-					if ( (elemLang = documentIsHTML ?
-						elem.lang :
-						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
-
-						elemLang = elemLang.toLowerCase();
-						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
-					}
-				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
-				return false;
-			};
-		}),
-
-		"target": function( elem ) {
-			var hash = window.location && window.location.hash;
-			return hash && hash.slice( 1 ) === elem.id;
-		},
-
-		"root": function( elem ) {
-			return elem === docElem;
-		},
-
-		"focus": function( elem ) {
-			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
-		},
-
-		"enabled": function( elem ) {
-			return elem.disabled === false;
-		},
-
-		"disabled": function( elem ) {
-			return elem.disabled === true;
-		},
-
-		"checked": function( elem ) {
-			var nodeName = elem.nodeName.toLowerCase();
-			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
-		},
-
-		"selected": function( elem ) {
-			if ( elem.parentNode ) {
-				elem.parentNode.selectedIndex;
-			}
-
-			return elem.selected === true;
-		},
-
-		"empty": function( elem ) {
-			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
-				if ( elem.nodeType < 6 ) {
-					return false;
-				}
-			}
-			return true;
-		},
-
-		"parent": function( elem ) {
-			return !Expr.pseudos["empty"]( elem );
-		},
-
-		"header": function( elem ) {
-			return rheader.test( elem.nodeName );
-		},
-
-		"input": function( elem ) {
-			return rinputs.test( elem.nodeName );
-		},
-
-		"button": function( elem ) {
-			var name = elem.nodeName.toLowerCase();
-			return name === "input" && elem.type === "button" || name === "button";
-		},
-
-		"text": function( elem ) {
-			var attr;
-			return elem.nodeName.toLowerCase() === "input" &&
-				elem.type === "text" &&
-
-				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
-		},
-
-		"first": createPositionalPseudo(function() {
-			return [ 0 ];
-		}),
-
-		"last": createPositionalPseudo(function( matchIndexes, length ) {
-			return [ length - 1 ];
-		}),
-
-		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
-			return [ argument < 0 ? argument + length : argument ];
-		}),
-
-		"even": createPositionalPseudo(function( matchIndexes, length ) {
-			var i = 0;
-			for ( ; i < length; i += 2 ) {
-				matchIndexes.push( i );
-			}
-			return matchIndexes;
-		}),
-
-		"odd": createPositionalPseudo(function( matchIndexes, length ) {
-			var i = 1;
-			for ( ; i < length; i += 2 ) {
-				matchIndexes.push( i );
-			}
-			return matchIndexes;
-		}),
-
-		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
-			var i = argument < 0 ? argument + length : argument;
-			for ( ; --i >= 0; ) {
-				matchIndexes.push( i );
-			}
-			return matchIndexes;
-		}),
-
-		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
-			var i = argument < 0 ? argument + length : argument;
-			for ( ; ++i < length; ) {
-				matchIndexes.push( i );
-			}
-			return matchIndexes;
-		})
-	}
-};
-
-Expr.pseudos["nth"] = Expr.pseudos["eq"];
-
-for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
-	Expr.pseudos[ i ] = createInputPseudo( i );
-}
-for ( i in { submit: true, reset: true } ) {
-	Expr.pseudos[ i ] = createButtonPseudo( i );
-}
-
-function setFilters() {}
-setFilters.prototype = Expr.filters = Expr.pseudos;
-Expr.setFilters = new setFilters();
-
-function tokenize( selector, parseOnly ) {
-	var matched, match, tokens, type,
-		soFar, groups, preFilters,
-		cached = tokenCache[ selector + " " ];
-
-	if ( cached ) {
-		return parseOnly ? 0 : cached.slice( 0 );
-	}
-
-	soFar = selector;
-	groups = [];
-	preFilters = Expr.preFilter;
-
-	while ( soFar ) {
-
-		if ( !matched || (match = rcomma.exec( soFar )) ) {
-			if ( match ) {
-				soFar = soFar.slice( match[0].length ) || soFar;
-			}
-			groups.push( (tokens = []) );
-		}
-
-		matched = false;
-
-		if ( (match = rcombinators.exec( soFar )) ) {
-			matched = match.shift();
-			tokens.push({
-				value: matched,
-				type: match[0].replace( rtrim, " " )
-			});
-			soFar = soFar.slice( matched.length );
-		}
-
-		for ( type in Expr.filter ) {
-			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
-				(match = preFilters[ type ]( match ))) ) {
-				matched = match.shift();
-				tokens.push({
-					value: matched,
-					type: type,
-					matches: match
-				});
-				soFar = soFar.slice( matched.length );
-			}
-		}
-
-		if ( !matched ) {
-			break;
-		}
-	}
-
-	return parseOnly ?
-		soFar.length :
-		soFar ?
-			Sizzle.error( selector ) :
-			tokenCache( selector, groups ).slice( 0 );
-}
-
-function toSelector( tokens ) {
-	var i = 0,
-		len = tokens.length,
-		selector = "";
-	for ( ; i < len; i++ ) {
-		selector += tokens[i].value;
-	}
-	return selector;
-}
-
-function addCombinator( matcher, combinator, base ) {
-	var dir = combinator.dir,
-		checkNonElements = base && dir === "parentNode",
-		doneName = done++;
-
-	return combinator.first ?
-		function( elem, context, xml ) {
-			while ( (elem = elem[ dir ]) ) {
-				if ( elem.nodeType === 1 || checkNonElements ) {
-					return matcher( elem, context, xml );
-				}
-			}
-		} :
-
-		function( elem, context, xml ) {
-			var oldCache, outerCache,
-				newCache = [ dirruns, doneName ];
-
-			if ( xml ) {
-				while ( (elem = elem[ dir ]) ) {
-					if ( elem.nodeType === 1 || checkNonElements ) {
-						if ( matcher( elem, context, xml ) ) {
-							return true;
-						}
-					}
-				}
-			} else {
-				while ( (elem = elem[ dir ]) ) {
-					if ( elem.nodeType === 1 || checkNonElements ) {
-						outerCache = elem[ expando ] || (elem[ expando ] = {});
-						if ( (oldCache = outerCache[ dir ]) &&
-							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
-
-							return (newCache[ 2 ] = oldCache[ 2 ]);
-						} else {
-							outerCache[ dir ] = newCache;
-
-							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
-								return true;
-							}
-						}
-					}
-				}
-			}
-		};
-}
-
-function elementMatcher( matchers ) {
-	return matchers.length > 1 ?
-		function( elem, context, xml ) {
-			var i = matchers.length;
-			while ( i-- ) {
-				if ( !matchers[i]( elem, context, xml ) ) {
-					return false;
-				}
-			}
-			return true;
-		} :
-		matchers[0];
-}
-
-function multipleContexts( selector, contexts, results ) {
-	var i = 0,
-		len = contexts.length;
-	for ( ; i < len; i++ ) {
-		Sizzle( selector, contexts[i], results );
-	}
-	return results;
-}
-
-function condense( unmatched, map, filter, context, xml ) {
-	var elem,
-		newUnmatched = [],
-		i = 0,
-		len = unmatched.length,
-		mapped = map != null;
-
-	for ( ; i < len; i++ ) {
-		if ( (elem = unmatched[i]) ) {
-			if ( !filter || filter( elem, context, xml ) ) {
-				newUnmatched.push( elem );
-				if ( mapped ) {
-					map.push( i );
-				}
-			}
-		}
-	}
-
-	return newUnmatched;
-}
-
-function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
-	if ( postFilter && !postFilter[ expando ] ) {
-		postFilter = setMatcher( postFilter );
-	}
-	if ( postFinder && !postFinder[ expando ] ) {
-		postFinder = setMatcher( postFinder, postSelector );
-	}
-	return markFunction(function( seed, results, context, xml ) {
-		var temp, i, elem,
-			preMap = [],
-			postMap = [],
-			preexisting = results.length,
-
-			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
-
-			matcherIn = preFilter && ( seed || !selector ) ?
-				condense( elems, preMap, preFilter, context, xml ) :
-				elems,
-
-			matcherOut = matcher ?
-				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
-
-					[] :
-
-					results :
-				matcherIn;
-
-		if ( matcher ) {
-			matcher( matcherIn, matcherOut, context, xml );
-		}
-
-		if ( postFilter ) {
-			temp = condense( matcherOut, postMap );
-			postFilter( temp, [], context, xml );
-
-			i = temp.length;
-			while ( i-- ) {
-				if ( (elem = temp[i]) ) {
-					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
-				}
-			}
-		}
-
-		if ( seed ) {
-			if ( postFinder || preFilter ) {
-				if ( postFinder ) {
-					temp = [];
-					i = matcherOut.length;
-					while ( i-- ) {
-						if ( (elem = matcherOut[i]) ) {
-							temp.push( (matcherIn[i] = elem) );
-						}
-					}
-					postFinder( null, (matcherOut = []), temp, xml );
-				}
-
-				i = matcherOut.length;
-				while ( i-- ) {
-					if ( (elem = matcherOut[i]) &&
-						(temp = postFinder ? indexOf.call( seed, elem ) : preMap[i]) > -1 ) {
-
-						seed[temp] = !(results[temp] = elem);
-					}
-				}
-			}
-
-		} else {
-			matcherOut = condense(
-				matcherOut === results ?
-					matcherOut.splice( preexisting, matcherOut.length ) :
-					matcherOut
-			);
-			if ( postFinder ) {
-				postFinder( null, results, matcherOut, xml );
-			} else {
-				push.apply( results, matcherOut );
-			}
-		}
-	});
-}
-
-function matcherFromTokens( tokens ) {
-	var checkContext, matcher, j,
-		len = tokens.length,
-		leadingRelative = Expr.relative[ tokens[0].type ],
-		implicitRelative = leadingRelative || Expr.relative[" "],
-		i = leadingRelative ? 1 : 0,
-
-		matchContext = addCombinator( function( elem ) {
-			return elem === checkContext;
-		}, implicitRelative, true ),
-		matchAnyContext = addCombinator( function( elem ) {
-			return indexOf.call( checkContext, elem ) > -1;
-		}, implicitRelative, true ),
-		matchers = [ function( elem, context, xml ) {
-			return ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
-				(checkContext = context).nodeType ?
-					matchContext( elem, context, xml ) :
-					matchAnyContext( elem, context, xml ) );
-		} ];
-
-	for ( ; i < len; i++ ) {
-		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
-			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
-		} else {
-			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
-
-			if ( matcher[ expando ] ) {
-				j = ++i;
-				for ( ; j < len; j++ ) {
-					if ( Expr.relative[ tokens[j].type ] ) {
-						break;
-					}
-				}
-				return setMatcher(
-					i > 1 && elementMatcher( matchers ),
-					i > 1 && toSelector(
-						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
-					).replace( rtrim, "$1" ),
-					matcher,
-					i < j && matcherFromTokens( tokens.slice( i, j ) ),
-					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
-					j < len && toSelector( tokens )
-				);
-			}
-			matchers.push( matcher );
-		}
-	}
-
-	return elementMatcher( matchers );
-}
-
-function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
-	var bySet = setMatchers.length > 0,
-		byElement = elementMatchers.length > 0,
-		superMatcher = function( seed, context, xml, results, outermost ) {
-			var elem, j, matcher,
-				matchedCount = 0,
-				i = "0",
-				unmatched = seed && [],
-				setMatched = [],
-				contextBackup = outermostContext,
-				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
-				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
-				len = elems.length;
-
-			if ( outermost ) {
-				outermostContext = context !== document && context;
-			}
-
-			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
-				if ( byElement && elem ) {
-					j = 0;
-					while ( (matcher = elementMatchers[j++]) ) {
-						if ( matcher( elem, context, xml ) ) {
-							results.push( elem );
-							break;
-						}
-					}
-					if ( outermost ) {
-						dirruns = dirrunsUnique;
-					}
-				}
-
-				if ( bySet ) {
-					if ( (elem = !matcher && elem) ) {
-						matchedCount--;
-					}
-
-					if ( seed ) {
-						unmatched.push( elem );
-					}
-				}
-			}
-
-			matchedCount += i;
-			if ( bySet && i !== matchedCount ) {
-				j = 0;
-				while ( (matcher = setMatchers[j++]) ) {
-					matcher( unmatched, setMatched, context, xml );
-				}
-
-				if ( seed ) {
-					if ( matchedCount > 0 ) {
-						while ( i-- ) {
-							if ( !(unmatched[i] || setMatched[i]) ) {
-								setMatched[i] = pop.call( results );
-							}
-						}
-					}
-
-					setMatched = condense( setMatched );
-				}
-
-				push.apply( results, setMatched );
-
-				if ( outermost && !seed && setMatched.length > 0 &&
-					( matchedCount + setMatchers.length ) > 1 ) {
-
-					Sizzle.uniqueSort( results );
-				}
-			}
-
-			if ( outermost ) {
-				dirruns = dirrunsUnique;
-				outermostContext = contextBackup;
-			}
-
-			return unmatched;
-		};
-
-	return bySet ?
-		markFunction( superMatcher ) :
-		superMatcher;
-}
-
-compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
-	var i,
-		setMatchers = [],
-		elementMatchers = [],
-		cached = compilerCache[ selector + " " ];
-
-	if ( !cached ) {
-		if ( !match ) {
-			match = tokenize( selector );
-		}
-		i = match.length;
-		while ( i-- ) {
-			cached = matcherFromTokens( match[i] );
-			if ( cached[ expando ] ) {
-				setMatchers.push( cached );
-			} else {
-				elementMatchers.push( cached );
-			}
-		}
-
-		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
-
-		cached.selector = selector;
-	}
-	return cached;
-};
-
-/**
- * A low-level selection function that works with Sizzle's compiled
- *  selector functions
- * @param {String|Function} selector A selector or a pre-compiled
- *  selector function built with Sizzle.compile
- * @param {Element} context
- * @param {Array} [results]
- * @param {Array} [seed] A set of elements to match against
- */
-select = Sizzle.select = function( selector, context, results, seed ) {
-	var i, tokens, token, type, find,
-		compiled = typeof selector === "function" && selector,
-		match = !seed && tokenize( (selector = compiled.selector || selector) );
-
-	results = results || [];
-
-	if ( match.length === 1 ) {
-
-		tokens = match[0] = match[0].slice( 0 );
-		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
-				support.getById && context.nodeType === 9 && documentIsHTML &&
-				Expr.relative[ tokens[1].type ] ) {
-
-			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
-			if ( !context ) {
-				return results;
-
-			} else if ( compiled ) {
-				context = context.parentNode;
-			}
-
-			selector = selector.slice( tokens.shift().value.length );
-		}
-
-		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
-		while ( i-- ) {
-			token = tokens[i];
-
-			if ( Expr.relative[ (type = token.type) ] ) {
-				break;
-			}
-			if ( (find = Expr.find[ type ]) ) {
-				if ( (seed = find(
-					token.matches[0].replace( runescape, funescape ),
-					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
-				)) ) {
-
-					tokens.splice( i, 1 );
-					selector = seed.length && toSelector( tokens );
-					if ( !selector ) {
-						push.apply( results, seed );
-						return results;
-					}
-
-					break;
-				}
-			}
-		}
-	}
-
-	( compiled || compile( selector, match ) )(
-		seed,
-		context,
-		!documentIsHTML,
-		results,
-		rsibling.test( selector ) && testContext( context.parentNode ) || context
-	);
-	return results;
-};
-
-
-support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
-
-support.detectDuplicates = !!hasDuplicate;
-
-setDocument();
-
-support.sortDetached = assert(function( div1 ) {
-	return div1.compareDocumentPosition( document.createElement("div") ) & 1;
-});
-
-if ( !assert(function( div ) {
-	div.innerHTML = "<a href='#'></a>";
-	return div.firstChild.getAttribute("href") === "#" ;
-}) ) {
-	addHandle( "type|href|height|width", function( elem, name, isXML ) {
-		if ( !isXML ) {
-			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
-		}
-	});
-}
-
-if ( !support.attributes || !assert(function( div ) {
-	div.innerHTML = "<input/>";
-	div.firstChild.setAttribute( "value", "" );
-	return div.firstChild.getAttribute( "value" ) === "";
-}) ) {
-	addHandle( "value", function( elem, name, isXML ) {
-		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
-			return elem.defaultValue;
-		}
-	});
-}
-
-if ( !assert(function( div ) {
-	return div.getAttribute("disabled") == null;
-}) ) {
-	addHandle( booleans, function( elem, name, isXML ) {
-		var val;
-		if ( !isXML ) {
-			return elem[ name ] === true ? name.toLowerCase() :
-					(val = elem.getAttributeNode( name )) && val.specified ?
-					val.value :
-				null;
-		}
-	});
-}
-
-if ( typeof define === "function" && define.amd ) {
-	define(function() { return Sizzle; });
-} else if ( typeof module !== "undefined" && module.exports ) {
-	module.exports = Sizzle;
-} else {
-	window.Sizzle = Sizzle;
-}
-
-})( window );
-
-;(function() {
-  if (typeof Sizzle !== 'undefined') {
-    return;
-  }
-
-  if (typeof define !== 'undefined' && define.amd) {
-    window.Sizzle = Prototype._actual_sizzle;
-    window.define = Prototype._original_define;
-    delete Prototype._actual_sizzle;
-    delete Prototype._original_define;
-  } else if (typeof module !== 'undefined' && module.exports) {
-    window.Sizzle = module.exports;
-    module.exports = {};
-  }
-})();
-
-;(function(engine) {
-  var extendElements = Prototype.Selector.extendElements;
-
-  function select(selector, scope) {
-    return extendElements(engine(selector, scope || document));
-  }
-
-  function match(element, selector) {
-    return engine.matches(selector, [element]).length == 1;
-  }
-
-  Prototype.Selector.engine = engine;
-  Prototype.Selector.select = select;
-  Prototype.Selector.match = match;
-})(Sizzle);
-
-window.Sizzle = Prototype._original_property;
-delete Prototype._original_property;
-
-var Form = {
-  reset: function(form) {
-    form = $(form);
-    form.reset();
-    return form;
-  },
-
-  serializeElements: function(elements, options) {
-    if (typeof options != 'object') options = { hash: !!options };
-    else if (Object.isUndefined(options.hash)) options.hash = true;
-    var key, value, submitted = false, submit = options.submit, accumulator, initial;
-
-    if (options.hash) {
-      initial = {};
-      accumulator = function(result, key, value) {
-        if (key in result) {
-          if (!Object.isArray(result[key])) result[key] = [result[key]];
-          result[key] = result[key].concat(value);
-        } else result[key] = value;
-        return result;
-      };
-    } else {
-      initial = '';
-      accumulator = function(result, key, values) {
-        if (!Object.isArray(values)) {values = [values];}
-        if (!values.length) {return result;}
-        var encodedKey = encodeURIComponent(key).gsub(/%20/, '+');
-        return result + (result ? "&" : "") + values.map(function (value) {
-          value = value.gsub(/(\r)?\n/, '\r\n');
-          value = encodeURIComponent(value);
-          value = value.gsub(/%20/, '+');
-          return encodedKey + "=" + value;
-        }).join("&");
-      };
-    }
-
-    return elements.inject(initial, function(result, element) {
-      if (!element.disabled && element.name) {
-        key = element.name; value = $(element).getValue();
-        if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
-            submit !== false && (!submit || key == submit) && (submitted = true)))) {
-          result = accumulator(result, key, value);
-        }
-      }
-      return result;
-    });
-  }
-};
-
-Form.Methods = {
-  serialize: function(form, options) {
-    return Form.serializeElements(Form.getElements(form), options);
-  },
-
-
-  getElements: function(form) {
-    var elements = $(form).getElementsByTagName('*');
-    var element, results = [], serializers = Form.Element.Serializers;
-
-    for (var i = 0; element = elements[i]; i++) {
-      if (serializers[element.tagName.toLowerCase()])
-        results.push(Element.extend(element));
-    }
-    return results;
-  },
-
-  getInputs: function(form, typeName, name) {
-    form = $(form);
-    var inputs = form.getElementsByTagName('input');
-
-    if (!typeName && !name) return $A(inputs).map(Element.extend);
-
-    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
-      var input = inputs[i];
-      if ((typeName && input.type != typeName) || (name && input.name != name))
-        continue;
-      matchingInputs.push(Element.extend(input));
-    }
-
-    return matchingInputs;
-  },
-
-  disable: function(form) {
-    form = $(form);
-    Form.getElements(form).invoke('disable');
-    return form;
-  },
-
-  enable: function(form) {
-    form = $(form);
-    Form.getElements(form).invoke('enable');
-    return form;
-  },
-
-  findFirstElement: function(form) {
-    var elements = $(form).getElements().findAll(function(element) {
-      return 'hidden' != element.type && !element.disabled;
-    });
-    var firstByIndex = elements.findAll(function(element) {
-      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
-    }).sortBy(function(element) { return element.tabIndex }).first();
-
-    return firstByIndex ? firstByIndex : elements.find(function(element) {
-      return /^(?:input|select|textarea)$/i.test(element.tagName);
-    });
-  },
-
-  focusFirstElement: function(form) {
-    form = $(form);
-    var element = form.findFirstElement();
-    if (element) element.activate();
-    return form;
-  },
-
-  request: function(form, options) {
-    form = $(form), options = Object.clone(options || { });
-
-    var params = options.parameters, action = form.readAttribute('action') || '';
-    if (action.blank()) action = window.location.href;
-    options.parameters = form.serialize(true);
-
-    if (params) {
-      if (Object.isString(params)) params = params.toQueryParams();
-      Object.extend(options.parameters, params);
-    }
-
-    if (form.hasAttribute('method') && !options.method)
-      options.method = form.method;
-
-    return new Ajax.Request(action, options);
-  }
-};
-
-/*--------------------------------------------------------------------------*/
-
-
-Form.Element = {
-  focus: function(element) {
-    $(element).focus();
-    return element;
-  },
-
-  select: function(element) {
-    $(element).select();
-    return element;
-  }
-};
-
-Form.Element.Methods = {
-
-  serialize: function(element) {
-    element = $(element);
-    if (!element.disabled && element.name) {
-      var value = element.getValue();
-      if (value != undefined) {
-        var pair = { };
-        pair[element.name] = value;
-        return Object.toQueryString(pair);
-      }
-    }
-    return '';
-  },
-
-  getValue: function(element) {
-    element = $(element);
-    var method = element.tagName.toLowerCase();
-    return Form.Element.Serializers[method](element);
-  },
-
-  setValue: function(element, value) {
-    element = $(element);
-    var method = element.tagName.toLowerCase();
-    Form.Element.Serializers[method](element, value);
-    return element;
-  },
-
-  clear: function(element) {
-    $(element).value = '';
-    return element;
-  },
-
-  present: function(element) {
-    return $(element).value != '';
-  },
-
-  activate: function(element) {
-    element = $(element);
-    try {
-      element.focus();
-      if (element.select && (element.tagName.toLowerCase() != 'input' ||
-          !(/^(?:button|reset|submit)$/i.test(element.type))))
-        element.select();
-    } catch (e) { }
-    return element;
-  },
-
-  disable: function(element) {
-    element = $(element);
-    element.disabled = true;
-    return element;
-  },
-
-  enable: function(element) {
-    element = $(element);
-    element.disabled = false;
-    return element;
-  }
-};
-
-/*--------------------------------------------------------------------------*/
-
-var Field = Form.Element;
-
-var $F = Form.Element.Methods.getValue;
-
-/*--------------------------------------------------------------------------*/
-
-Form.Element.Serializers = (function() {
-  function input(element, value) {
-    switch (element.type.toLowerCase()) {
-      case 'checkbox':
-      case 'radio':
-        return inputSelector(element, value);
-      default:
-        return valueSelector(element, value);
-    }
-  }
-
-  function inputSelector(element, value) {
-    if (Object.isUndefined(value))
-      return element.checked ? element.value : null;
-    else element.checked = !!value;
-  }
-
-  function valueSelector(element, value) {
-    if (Object.isUndefined(value)) return element.value;
-    else element.value = value;
-  }
-
-  function select(element, value) {
-    if (Object.isUndefined(value))
-      return (element.type === 'select-one' ? selectOne : selectMany)(element);
-
-    var opt, currentValue, single = !Object.isArray(value);
-    for (var i = 0, length = element.length; i < length; i++) {
-      opt = element.options[i];
-      currentValue = this.optionValue(opt);
-      if (single) {
-        if (currentValue == value) {
-          opt.selected = true;
-          return;
-        }
-      }
-      else opt.selected = value.include(currentValue);
-    }
-  }
-
-  function selectOne(element) {
-    var index = element.selectedIndex;
-    return index >= 0 ? optionValue(element.options[index]) : null;
-  }
-
-  function selectMany(element) {
-    var values, length = element.length;
-    if (!length) return null;
-
-    for (var i = 0, values = []; i < length; i++) {
-      var opt = element.options[i];
-      if (opt.selected) values.push(optionValue(opt));
-    }
-    return values;
-  }
-
-  function optionValue(opt) {
-    return Element.hasAttribute(opt, 'value') ? opt.value : opt.text;
-  }
-
-  return {
-    input:         input,
-    inputSelector: inputSelector,
-    textarea:      valueSelector,
-    select:        select,
-    selectOne:     selectOne,
-    selectMany:    selectMany,
-    optionValue:   optionValue,
-    button:        valueSelector
-  };
-})();
-
-/*--------------------------------------------------------------------------*/
-
-
-Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
-  initialize: function($super, element, frequency, callback) {
-    $super(callback, frequency);
-    this.element   = $(element);
-    this.lastValue = this.getValue();
-  },
-
-  execute: function() {
-    var value = this.getValue();
-    if (Object.isString(this.lastValue) && Object.isString(value) ?
-        this.lastValue != value : String(this.lastValue) != String(value)) {
-      this.callback(this.element, value);
-      this.lastValue = value;
-    }
-  }
-});
-
-Form.Element.Observer = Class.create(Abstract.TimedObserver, {
-  getValue: function() {
-    return Form.Element.getValue(this.element);
-  }
-});
-
-Form.Observer = Class.create(Abstract.TimedObserver, {
-  getValue: function() {
-    return Form.serialize(this.element);
-  }
-});
-
-/*--------------------------------------------------------------------------*/
-
-Abstract.EventObserver = Class.create({
-  initialize: function(element, callback) {
-    this.element  = $(element);
-    this.callback = callback;
-
-    this.lastValue = this.getValue();
-    if (this.element.tagName.toLowerCase() == 'form')
-      this.registerFormCallbacks();
-    else
-      this.registerCallback(this.element);
-  },
-
-  onElementEvent: function() {
-    var value = this.getValue();
-    if (this.lastValue != value) {
-      this.callback(this.element, value);
-      this.lastValue = value;
-    }
-  },
-
-  registerFormCallbacks: function() {
-    Form.getElements(this.element).each(this.registerCallback, this);
-  },
-
-  registerCallback: function(element) {
-    if (element.type) {
-      switch (element.type.toLowerCase()) {
-        case 'checkbox':
-        case 'radio':
-          Event.observe(element, 'click', this.onElementEvent.bind(this));
-          break;
-        default:
-          Event.observe(element, 'change', this.onElementEvent.bind(this));
-          break;
-      }
-    }
-  }
-});
-
-Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
-  getValue: function() {
-    return Form.Element.getValue(this.element);
-  }
-});
-
-Form.EventObserver = Class.create(Abstract.EventObserver, {
-  getValue: function() {
-    return Form.serialize(this.element);
-  }
-});
-(function(GLOBAL) {
-  var DIV = document.createElement('div');
-  var docEl = document.documentElement;
-  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
-   && 'onmouseleave' in docEl;
-
-  var Event = {
-    KEY_BACKSPACE: 8,
-    KEY_TAB:       9,
-    KEY_RETURN:   13,
-    KEY_ESC:      27,
-    KEY_LEFT:     37,
-    KEY_UP:       38,
-    KEY_RIGHT:    39,
-    KEY_DOWN:     40,
-    KEY_DELETE:   46,
-    KEY_HOME:     36,
-    KEY_END:      35,
-    KEY_PAGEUP:   33,
-    KEY_PAGEDOWN: 34,
-    KEY_INSERT:   45
-  };
-
-
-  var isIELegacyEvent = function(event) { return false; };
-
-  if (window.attachEvent) {
-    if (window.addEventListener) {
-      isIELegacyEvent = function(event) {
-        return !(event instanceof window.Event);
-      };
-    } else {
-      isIELegacyEvent = function(event) { return true; };
-    }
-  }
-
-  var _isButton;
-
-  function _isButtonForDOMEvents(event, code) {
-    return event.which ? (event.which === code + 1) : (event.button === code);
-  }
-
-  var legacyButtonMap = { 0: 1, 1: 4, 2: 2 };
-  function _isButtonForLegacyEvents(event, code) {
-    return event.button === legacyButtonMap[code];
-  }
-
-  function _isButtonForWebKit(event, code) {
-    switch (code) {
-      case 0: return event.which == 1 && !event.metaKey;
-      case 1: return event.which == 2 || (event.which == 1 && event.metaKey);
-      case 2: return event.which == 3;
-      default: return false;
-    }
-  }
-
-  if (window.attachEvent) {
-    if (!window.addEventListener) {
-      _isButton = _isButtonForLegacyEvents;
-    } else {
-      _isButton = function(event, code) {
-        return isIELegacyEvent(event) ? _isButtonForLegacyEvents(event, code) :
-         _isButtonForDOMEvents(event, code);
-      }
-    }
-  } else if (Prototype.Browser.WebKit) {
-    _isButton = _isButtonForWebKit;
-  } else {
-    _isButton = _isButtonForDOMEvents;
-  }
-
-  function isLeftClick(event)   { return _isButton(event, 0) }
-
-  function isMiddleClick(event) { return _isButton(event, 1) }
-
-  function isRightClick(event)  { return _isButton(event, 2) }
-
-  function element(event) {
-    return Element.extend(_element(event));
-  }
-
-  function _element(event) {
-    event = Event.extend(event);
-
-    var node = event.target, type = event.type,
-     currentTarget = event.currentTarget;
-
-    if (currentTarget && currentTarget.tagName) {
-      if (type === 'load' || type === 'error' ||
-        (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
-          && currentTarget.type === 'radio'))
-            node = currentTarget;
-    }
-
-    return node.nodeType == Node.TEXT_NODE ? node.parentNode : node;
-  }
-
-  function findElement(event, expression) {
-    var element = _element(event), selector = Prototype.Selector;
-    if (!expression) return Element.extend(element);
-    while (element) {
-      if (Object.isElement(element) && selector.match(element, expression))
-        return Element.extend(element);
-      element = element.parentNode;
-    }
-  }
-
-  function pointer(event) {
-    return { x: pointerX(event), y: pointerY(event) };
-  }
-
-  function pointerX(event) {
-    var docElement = document.documentElement,
-     body = document.body || { scrollLeft: 0 };
-
-    return event.pageX || (event.clientX +
-      (docElement.scrollLeft || body.scrollLeft) -
-      (docElement.clientLeft || 0));
-  }
-
-  function pointerY(event) {
-    var docElement = document.documentElement,
-     body = document.body || { scrollTop: 0 };
-
-    return  event.pageY || (event.clientY +
-       (docElement.scrollTop || body.scrollTop) -
-       (docElement.clientTop || 0));
-  }
-
-
-  function stop(event) {
-    Event.extend(event);
-    event.preventDefault();
-    event.stopPropagation();
-
-    event.stopped = true;
-  }
-
-
-  Event.Methods = {
-    isLeftClick:   isLeftClick,
-    isMiddleClick: isMiddleClick,
-    isRightClick:  isRightClick,
-
-    element:     element,
-    findElement: findElement,
-
-    pointer:  pointer,
-    pointerX: pointerX,
-    pointerY: pointerY,
-
-    stop: stop
-  };
-
-  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
-    m[name] = Event.Methods[name].methodize();
-    return m;
-  });
-
-  if (window.attachEvent) {
-    function _relatedTarget(event) {
-      var element;
-      switch (event.type) {
-        case 'mouseover':
-        case 'mouseenter':
-          element = event.fromElement;
-          break;
-        case 'mouseout':
-        case 'mouseleave':
-          element = event.toElement;
-          break;
-        default:
-          return null;
-      }
-      return Element.extend(element);
-    }
-
-    var additionalMethods = {
-      stopPropagation: function() { this.cancelBubble = true },
-      preventDefault:  function() { this.returnValue = false },
-      inspect: function() { return '[object Event]' }
-    };
-
-    Event.extend = function(event, element) {
-      if (!event) return false;
-
-      if (!isIELegacyEvent(event)) return event;
-
-      if (event._extendedByPrototype) return event;
-      event._extendedByPrototype = Prototype.emptyFunction;
-
-      var pointer = Event.pointer(event);
-
-      Object.extend(event, {
-        target: event.srcElement || element,
-        relatedTarget: _relatedTarget(event),
-        pageX:  pointer.x,
-        pageY:  pointer.y
-      });
-
-      Object.extend(event, methods);
-      Object.extend(event, additionalMethods);
-
-      return event;
-    };
-  } else {
-    Event.extend = Prototype.K;
-  }
-
-  if (window.addEventListener) {
-    Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
-    Object.extend(Event.prototype, methods);
-  }
-
-  var EVENT_TRANSLATIONS = {
-    mouseenter: 'mouseover',
-    mouseleave: 'mouseout'
-  };
-
-  function getDOMEventName(eventName) {
-    return EVENT_TRANSLATIONS[eventName] || eventName;
-  }
-
-  if (MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED)
-    getDOMEventName = Prototype.K;
-
-  function getUniqueElementID(element) {
-    if (element === window) return 0;
-
-    if (typeof element._prototypeUID === 'undefined')
-      element._prototypeUID = Element.Storage.UID++;
-    return element._prototypeUID;
-  }
-
-  function getUniqueElementID_IE(element) {
-    if (element === window) return 0;
-    if (element == document) return 1;
-    return element.uniqueID;
-  }
-
-  if ('uniqueID' in DIV)
-    getUniqueElementID = getUniqueElementID_IE;
-
-  function isCustomEvent(eventName) {
-    return eventName.include(':');
-  }
-
-  Event._isCustomEvent = isCustomEvent;
-
-  function getOrCreateRegistryFor(element, uid) {
-    var CACHE = GLOBAL.Event.cache;
-    if (Object.isUndefined(uid))
-      uid = getUniqueElementID(element);
-    if (!CACHE[uid]) CACHE[uid] = { element: element };
-    return CACHE[uid];
-  }
-
-  function destroyRegistryForElement(element, uid) {
-    if (Object.isUndefined(uid))
-      uid = getUniqueElementID(element);
-    delete GLOBAL.Event.cache[uid];
-  }
-
-
-  function register(element, eventName, handler) {
-    var registry = getOrCreateRegistryFor(element);
-    if (!registry[eventName]) registry[eventName] = [];
-    var entries = registry[eventName];
-
-    var i = entries.length;
-    while (i--)
-      if (entries[i].handler === handler) return null;
-
-    var uid = getUniqueElementID(element);
-    var responder = GLOBAL.Event._createResponder(uid, eventName, handler);
-    var entry = {
-      responder: responder,
-      handler:   handler
-    };
-
-    entries.push(entry);
-    return entry;
-  }
-
-  function unregister(element, eventName, handler) {
-    var registry = getOrCreateRegistryFor(element);
-    var entries = registry[eventName] || [];
-
-    var i = entries.length, entry;
-    while (i--) {
-      if (entries[i].handler === handler) {
-        entry = entries[i];
-        break;
-      }
-    }
-
-    if (entry) {
-      var index = entries.indexOf(entry);
-      entries.splice(index, 1);
-    }
-
-    if (entries.length === 0) {
-      delete registry[eventName];
-      if (Object.keys(registry).length === 1 && ('element' in registry))
-        destroyRegistryForElement(element);
-    }
-
-    return entry;
-  }
-
-
-  function observe(element, eventName, handler) {
-    element = $(element);
-    var entry = register(element, eventName, handler);
-
-    if (entry === null) return element;
-
-    var responder = entry.responder;
-    if (isCustomEvent(eventName))
-      observeCustomEvent(element, eventName, responder);
-    else
-      observeStandardEvent(element, eventName, responder);
-
-    return element;
-  }
-
-  function observeStandardEvent(element, eventName, responder) {
-    var actualEventName = getDOMEventName(eventName);
-    if (element.addEventListener) {
-      element.addEventListener(actualEventName, responder, false);
-    } else {
-      element.attachEvent('on' + actualEventName, responder);
-    }
-  }
-
-  function observeCustomEvent(element, eventName, responder) {
-    if (element.addEventListener) {
-      element.addEventListener('dataavailable', responder, false);
-    } else {
-      element.attachEvent('ondataavailable', responder);
-      element.attachEvent('onlosecapture',   responder);
-    }
-  }
-
-  function stopObserving(element, eventName, handler) {
-    element = $(element);
-    var handlerGiven = !Object.isUndefined(handler),
-     eventNameGiven = !Object.isUndefined(eventName);
-
-    if (!eventNameGiven && !handlerGiven) {
-      stopObservingElement(element);
-      return element;
-    }
-
-    if (!handlerGiven) {
-      stopObservingEventName(element, eventName);
-      return element;
-    }
-
-    var entry = unregister(element, eventName, handler);
-
-    if (!entry) return element;
-    removeEvent(element, eventName, entry.responder);
-    return element;
-  }
-
-  function stopObservingStandardEvent(element, eventName, responder) {
-    var actualEventName = getDOMEventName(eventName);
-    if (element.removeEventListener) {
-      element.removeEventListener(actualEventName, responder, false);
-    } else {
-      element.detachEvent('on' + actualEventName, responder);
-    }
-  }
-
-  function stopObservingCustomEvent(element, eventName, responder) {
-    if (element.removeEventListener) {
-      element.removeEventListener('dataavailable', responder, false);
-    } else {
-      element.detachEvent('ondataavailable', responder);
-      element.detachEvent('onlosecapture',   responder);
-    }
-  }
-
-
-
-  function stopObservingElement(element) {
-    var uid = getUniqueElementID(element), registry = GLOBAL.Event.cache[uid];
-    if (!registry) return;
-
-    destroyRegistryForElement(element, uid);
-
-    var entries, i;
-    for (var eventName in registry) {
-      if (eventName === 'element') continue;
-
-      entries = registry[eventName];
-      i = entries.length;
-      while (i--)
-        removeEvent(element, eventName, entries[i].responder);
-    }
-  }
-
-  function stopObservingEventName(element, eventName) {
-    var registry = getOrCreateRegistryFor(element);
-    var entries = registry[eventName];
-    if (entries) {
-      delete registry[eventName];
-    }
-
-    entries = entries || [];
-
-    var i = entries.length;
-    while (i--)
-      removeEvent(element, eventName, entries[i].responder);
-
-    for (var name in registry) {
-      if (name === 'element') continue;
-      return; // There is another registered event
-    }
-
-    destroyRegistryForElement(element);
-  }
-
-
-  function removeEvent(element, eventName, handler) {
-    if (isCustomEvent(eventName))
-      stopObservingCustomEvent(element, eventName, handler);
-    else
-      stopObservingStandardEvent(element, eventName, handler);
-  }
-
-
-
-  function getFireTarget(element) {
-    if (element !== document) return element;
-    if (document.createEvent && !element.dispatchEvent)
-      return document.documentElement;
-    return element;
-  }
-
-  function fire(element, eventName, memo, bubble) {
-    element = getFireTarget($(element));
-    if (Object.isUndefined(bubble)) bubble = true;
-    memo = memo || {};
-
-    var event = fireEvent(element, eventName, memo, bubble);
-    return Event.extend(event);
-  }
-
-  function fireEvent_DOM(element, eventName, memo, bubble) {
-    var event = document.createEvent('HTMLEvents');
-    event.initEvent('dataavailable', bubble, true);
-
-    event.eventName = eventName;
-    event.memo = memo;
-
-    element.dispatchEvent(event);
-    return event;
-  }
-
-  function fireEvent_IE(element, eventName, memo, bubble) {
-    var event = document.createEventObject();
-    event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';
-
-    event.eventName = eventName;
-    event.memo = memo;
-
-    element.fireEvent(event.eventType, event);
-    return event;
-  }
-
-  var fireEvent = document.createEvent ? fireEvent_DOM : fireEvent_IE;
-
-
-
-  Event.Handler = Class.create({
-    initialize: function(element, eventName, selector, callback) {
-      this.element   = $(element);
-      this.eventName = eventName;
-      this.selector  = selector;
-      this.callback  = callback;
-      this.handler   = this.handleEvent.bind(this);
-    },
-
-
-    start: function() {
-      Event.observe(this.element, this.eventName, this.handler);
-      return this;
-    },
-
-    stop: function() {
-      Event.stopObserving(this.element, this.eventName, this.handler);
-      return this;
-    },
-
-    handleEvent: function(event) {
-      var element = Event.findElement(event, this.selector);
-      if (element) this.callback.call(this.element, event, element);
-    }
-  });
-
-  function on(element, eventName, selector, callback) {
-    element = $(element);
-    if (Object.isFunction(selector) && Object.isUndefined(callback)) {
-      callback = selector, selector = null;
-    }
-
-    return new Event.Handler(element, eventName, selector, callback).start();
-  }
-
-  Object.extend(Event, Event.Methods);
-
-  Object.extend(Event, {
-    fire:          fire,
-    observe:       observe,
-    stopObserving: stopObserving,
-    p_on:            on
-  });
-
-  Element.addMethods({
-    fire:          fire,
-
-    observe:       observe,
-
-    stopObserving: stopObserving,
-
-    p_on:            on
-  });
-
-  Object.extend(document, {
-    fire:          fire.methodize(),
-
-    observe:       observe.methodize(),
-
-    stopObserving: stopObserving.methodize(),
-
-    p_on:            on.methodize(),
-
-    loaded:        false
-  });
-
-  if (GLOBAL.Event) Object.extend(window.Event, Event);
-  else GLOBAL.Event = Event;
-
-  GLOBAL.Event.cache = {};
-
-  function destroyCache_IE() {
-    GLOBAL.Event.cache = null;
-  }
-
-  if (window.attachEvent)
-    window.attachEvent('onunload', destroyCache_IE);
-
-  DIV = null;
-  docEl = null;
-})(this);
-
-(function(GLOBAL) {
-  /* Code for creating leak-free event responders is based on work by
-   John-David Dalton. */
-
-  var docEl = document.documentElement;
-  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
-    && 'onmouseleave' in docEl;
-
-  function isSimulatedMouseEnterLeaveEvent(eventName) {
-    return !MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
-     (eventName === 'mouseenter' || eventName === 'mouseleave');
-  }
-
-  function createResponder(uid, eventName, handler) {
-    if (Event._isCustomEvent(eventName))
-      return createResponderForCustomEvent(uid, eventName, handler);
-    if (isSimulatedMouseEnterLeaveEvent(eventName))
-      return createMouseEnterLeaveResponder(uid, eventName, handler);
-
-    return function(event) {
-      if (!Event.cache) return;
-
-      var element = Event.cache[uid].element;
-      Event.extend(event, element);
-      handler.call(element, event);
-    };
-  }
-
-  function createResponderForCustomEvent(uid, eventName, handler) {
-    return function(event) {
-      var cache = Event.cache[uid];
-      var element =  cache && cache.element;
-
-      if (Object.isUndefined(event.eventName))
-        return false;
-
-      if (event.eventName !== eventName)
-        return false;
-
-      Event.extend(event, element);
-      handler.call(element, event);
-    };
-  }
-
-  function createMouseEnterLeaveResponder(uid, eventName, handler) {
-    return function(event) {
-      var element = Event.cache[uid].element;
-
-      Event.extend(event, element);
-      var parent = event.relatedTarget;
-
-      while (parent && parent !== element) {
-        try { parent = parent.parentNode; }
-        catch(e) { parent = element; }
-      }
-
-      if (parent === element) return;
-      handler.call(element, event);
-    }
-  }
-
-  GLOBAL.Event._createResponder = createResponder;
-  docEl = null;
-})(this);
-
-(function(GLOBAL) {
-  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
-     Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */
-
-  var TIMER;
-
-  function fireContentLoadedEvent() {
-    if (document.loaded) return;
-    if (TIMER) window.clearTimeout(TIMER);
-    document.loaded = true;
-    document.fire('dom:loaded');
-  }
-
-  function checkReadyState() {
-    if (document.readyState === 'complete') {
-      document.detachEvent('onreadystatechange', checkReadyState);
-      fireContentLoadedEvent();
-    }
-  }
-
-  function pollDoScroll() {
-    try {
-      document.documentElement.doScroll('left');
-    } catch (e) {
-      TIMER = pollDoScroll.defer();
-      return;
-    }
-
-    fireContentLoadedEvent();
-  }
-
-
-  if (document.readyState === 'complete') {
-    fireContentLoadedEvent();
-    return;
-  }
-
-  if (document.addEventListener) {
-    document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
-  } else {
-    document.attachEvent('onreadystatechange', checkReadyState);
-    if (window == top) TIMER = pollDoScroll.defer();
-  }
-
-  Event.observe(window, 'load', fireContentLoadedEvent);
-})(this);
-
-
-Element.addMethods();
-/*------------------------------- DEPRECATED -------------------------------*/
-
-Hash.toQueryString = Object.toQueryString;
-
-var Toggle = { display: Element.toggle };
-
-Element.addMethods({
-  childOf: Element.Methods.descendantOf
-});
-
-var Insertion = {
-  Before: function(element, content) {
-    return Element.insert(element, {before:content});
-  },
-
-  Top: function(element, content) {
-    return Element.insert(element, {top:content});
-  },
-
-  Bottom: function(element, content) {
-    return Element.insert(element, {bottom:content});
-  },
-
-  After: function(element, content) {
-    return Element.insert(element, {after:content});
-  }
-};
-
-var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
-
-var Position = {
-  includeScrollOffsets: false,
-
-  prepare: function() {
-    this.deltaX =  window.pageXOffset
-                || document.documentElement.scrollLeft
-                || document.body.scrollLeft
-                || 0;
-    this.deltaY =  window.pageYOffset
-                || document.documentElement.scrollTop
-                || document.body.scrollTop
-                || 0;
-  },
-
-  within: function(element, x, y) {
-    if (this.includeScrollOffsets)
-      return this.withinIncludingScrolloffsets(element, x, y);
-    this.xcomp = x;
-    this.ycomp = y;
-    this.offset = Element.cumulativeOffset(element);
-
-    return (y >= this.offset[1] &&
-            y <  this.offset[1] + element.offsetHeight &&
-            x >= this.offset[0] &&
-            x <  this.offset[0] + element.offsetWidth);
-  },
-
-  withinIncludingScrolloffsets: function(element, x, y) {
-    var offsetcache = Element.cumulativeScrollOffset(element);
-
-    this.xcomp = x + offsetcache[0] - this.deltaX;
-    this.ycomp = y + offsetcache[1] - this.deltaY;
-    this.offset = Element.cumulativeOffset(element);
-
-    return (this.ycomp >= this.offset[1] &&
-            this.ycomp <  this.offset[1] + element.offsetHeight &&
-            this.xcomp >= this.offset[0] &&
-            this.xcomp <  this.offset[0] + element.offsetWidth);
-  },
-
-  overlap: function(mode, element) {
-    if (!mode) return 0;
-    if (mode == 'vertical')
-      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
-        element.offsetHeight;
-    if (mode == 'horizontal')
-      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
-        element.offsetWidth;
-  },
-
-
-  cumulativeOffset: Element.Methods.cumulativeOffset,
-
-  positionedOffset: Element.Methods.positionedOffset,
-
-  absolutize: function(element) {
-    Position.prepare();
-    return Element.absolutize(element);
-  },
-
-  relativize: function(element) {
-    Position.prepare();
-    return Element.relativize(element);
-  },
-
-  realOffset: Element.Methods.cumulativeScrollOffset,
-
-  offsetParent: Element.Methods.getOffsetParent,
-
-  page: Element.Methods.viewportOffset,
-
-  clone: function(source, target, options) {
-    options = options || { };
-    return Element.clonePosition(target, source, options);
-  }
-};
-
-/*--------------------------------------------------------------------------*/
-
-if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
-  function iter(name) {
-    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
-  }
-
-  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
-  function(element, className) {
-    className = className.toString().strip();
-    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
-    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
-  } : function(element, className) {
-    className = className.toString().strip();
-    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
-    if (!classNames && !className) return elements;
-
-    var nodes = $(element).getElementsByTagName('*');
-    className = ' ' + className + ' ';
-
-    for (var i = 0, child, cn; child = nodes[i]; i++) {
-      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
-          (classNames && classNames.all(function(name) {
-            return !name.toString().blank() && cn.include(' ' + name + ' ');
-          }))))
-        elements.push(Element.extend(child));
-    }
-    return elements;
-  };
-
-  return function(className, parentElement) {
-    return $(parentElement || document.body).getElementsByClassName(className);
-  };
-}(Element.Methods);
-
-/*--------------------------------------------------------------------------*/
-
-Element.ClassNames = Class.create();
-Element.ClassNames.prototype = {
-  initialize: function(element) {
-    this.element = $(element);
-  },
-
-  _each: function(iterator, context) {
-    this.element.className.split(/\s+/).select(function(name) {
-      return name.length > 0;
-    })._each(iterator, context);
-  },
-
-  set: function(className) {
-    this.element.className = className;
-  },
-
-  add: function(classNameToAdd) {
-    if (this.include(classNameToAdd)) return;
-    this.set($A(this).concat(classNameToAdd).join(' '));
-  },
-
-  remove: function(classNameToRemove) {
-    if (!this.include(classNameToRemove)) return;
-    this.set($A(this).without(classNameToRemove).join(' '));
-  },
-
-  toString: function() {
-    return $A(this).join(' ');
-  }
-};
-
-Object.extend(Element.ClassNames.prototype, Enumerable);
-
-/*--------------------------------------------------------------------------*/
-
-(function() {
-  window.Selector = Class.create({
-    initialize: function(expression) {
-      this.expression = expression.strip();
-    },
-
-    findElements: function(rootElement) {
-      return Prototype.Selector.select(this.expression, rootElement);
-    },
-
-    match: function(element) {
-      return Prototype.Selector.match(element, this.expression);
-    },
-
-    toString: function() {
-      return this.expression;
-    },
-
-    inspect: function() {
-      return "#<Selector: " + this.expression + ">";
-    }
-  });
-
-  Object.extend(Selector, {
-    matchElements: function(elements, expression) {
-      var match = Prototype.Selector.match,
-          results = [];
-
-      for (var i = 0, length = elements.length; i < length; i++) {
-        var element = elements[i];
-        if (match(element, expression)) {
-          results.push(Element.extend(element));
-        }
-      }
-      return results;
-    },
-
-    findElement: function(elements, expression, index) {
-      index = index || 0;
-      var matchIndex = 0, element;
-      for (var i = 0, length = elements.length; i < length; i++) {
-        element = elements[i];
-        if (Prototype.Selector.match(element, expression) && index === matchIndex++) {
-          return Element.extend(element);
-        }
-      }
-    },
-
-    findChildElements: function(element, expressions) {
-      var selector = expressions.toArray().join(', ');
-      return Prototype.Selector.select(selector, element || document);
-    }
-  });
-})();
diff --git a/plugins/share/init.php b/plugins/share/init.php
index 4c47e29d3..0c975cfdd 100644
--- a/plugins/share/init.php
+++ b/plugins/share/init.php
@@ -156,7 +156,6 @@ class Share extends Plugin {
 				<head>
 					<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/>
 					<title><?= $line["title"] ?></title>
-					<?= javascript_tag("lib/prototype.js") ?>
 					<?= javascript_tag("js/utility.js") ?>
 					<style type='text/css'>
 						@media (prefers-color-scheme: dark) {
diff --git a/prefs.php b/prefs.php
index 71dc73b29..2b2af8452 100644
--- a/prefs.php
+++ b/prefs.php
@@ -59,8 +59,7 @@
 	</script>
 
 	<?php
-	foreach (array(#"lib/prototype.js",
-				"lib/dojo/dojo.js",
+	foreach (array("lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
 				"js/common.js",
 				"js/prefs.js",
-- 
cgit v1.2.3-54-g00ecf

From 6b43b788d909ce20f07f29f9f3ccd2f6a8715616 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Fri, 19 Feb 2021 10:22:00 +0300
Subject: migrate xhrJson invocations to the new helper

(limited to 'include/login_form.php')

diff --git a/include/login_form.php b/include/login_form.php
index d1af23459..211302a87 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -59,7 +59,7 @@
 	        if (login && login != this.previousLogin) {
                 this.previousLogin = login;
 
-                xhrJson("public.php", {op: "getprofiles", login: login},
+                xhr.json("public.php", {op: "getprofiles", login: login},
                     (reply) => {
                         const profile = dijit.byId('profile');
 
diff --git a/js/App.js b/js/App.js
index d61c6ead0..0c12c7e6f 100644
--- a/js/App.js
+++ b/js/App.js
@@ -775,7 +775,7 @@ const App = {
    checkForUpdates: function() {
       console.log('checking for updates...');
 
-      xhrJson("backend.php", {op: 'rpc', method: 'checkforupdates'})
+      xhr.json("backend.php", {op: 'rpc', method: 'checkforupdates'})
          .then((reply) => {
             console.log('update reply', reply);
 
diff --git a/js/Article.js b/js/Article.js
index 90be90f7b..379e05644 100644
--- a/js/Article.js
+++ b/js/Article.js
@@ -115,7 +115,7 @@ const Article = {
 	displayUrl: function (id) {
 		const query = {op: "article", method: "getmetadatabyid", id: id};
 
-		xhrJson("backend.php", query, (reply) => {
+		xhr.json("backend.php", query, (reply) => {
 			if (reply && reply.link) {
 				prompt(__("Article URL:"), reply.link);
 			} else {
@@ -358,7 +358,7 @@ const Article = {
 		const tmph = dojo.connect(dialog, 'onShow', function () {
 			dojo.disconnect(tmph);
 
-			xhrJson("backend.php", {op: "article", method: "printArticleTags", id: id}, (reply) => {
+			xhr.json("backend.php", {op: "article", method: "printArticleTags", id: id}, (reply) => {
 
 				dijit.getEnclosingWidget(App.byId("tags_str"))
 					.attr('value', reply.tags.join(", "))
diff --git a/js/CommonDialogs.js b/js/CommonDialogs.js
index 6ace91c8c..3acd2b577 100644
--- a/js/CommonDialogs.js
+++ b/js/CommonDialogs.js
@@ -78,7 +78,7 @@ const	CommonDialogs = {
 			return false;
 		},
 		subscribeToFeed: function() {
-			xhrJson("backend.php",
+			xhr.json("backend.php",
 					{op: "feeds", method: "subscribeToFeed"},
 					(reply) => {
 						const dialog = new fox.SingleUseDialog({
@@ -265,7 +265,7 @@ const	CommonDialogs = {
 		},
 		showFeedsWithErrors: function() {
 
-			xhrJson("backend.php", {op: "pref-feeds", method: "feedsWithErrors"}, (reply) => {
+			xhr.json("backend.php", {op: "pref-feeds", method: "feedsWithErrors"}, (reply) => {
 
 				const dialog = new fox.SingleUseDialog({
 					id: "errorFeedsDlg",
@@ -446,7 +446,7 @@ const	CommonDialogs = {
 
 			Notify.progress("Loading, please wait...", true);
 
-			xhrJson("backend.php", {op: "pref-feeds", method: "getOPMLKey"}, (reply) => {
+			xhr.json("backend.php", {op: "pref-feeds", method: "getOPMLKey"}, (reply) => {
 				try {
 					const dialog = new fox.SingleUseDialog({
 						title: __("Public OPML URL"),
@@ -454,7 +454,7 @@ const	CommonDialogs = {
 							if (confirm(__("Replace current OPML publishing address with a new one?"))) {
 								Notify.progress("Trying to change address...", true);
 
-								xhrJson("backend.php", {op: "pref-feeds", method: "regenOPMLKey"}, (reply) => {
+								xhr.json("backend.php", {op: "pref-feeds", method: "regenOPMLKey"}, (reply) => {
 									if (reply) {
 										const new_link = reply.link;
 										const target = this.domNode.querySelector('.generated_url');
@@ -504,7 +504,7 @@ const	CommonDialogs = {
 
 			Notify.progress("Loading, please wait...", true);
 
-			xhrJson("backend.php", {op: "pref-feeds", method: "getsharedurl", id: feed, is_cat: is_cat, search: search}, (reply) => {
+			xhr.json("backend.php", {op: "pref-feeds", method: "getsharedurl", id: feed, is_cat: is_cat, search: search}, (reply) => {
 				try {
 					const dialog = new fox.SingleUseDialog({
 						title: __("Show as feed"),
@@ -515,7 +515,7 @@ const	CommonDialogs = {
 
 								const query = {op: "pref-feeds", method: "regenFeedKey", id: feed, is_cat: is_cat};
 
-								xhrJson("backend.php", query, (reply) => {
+								xhr.json("backend.php", query, (reply) => {
 									const new_link = reply.link;
 									const target = this.domNode.querySelector(".generated_url");
 
diff --git a/js/Feeds.js b/js/Feeds.js
index 67c78cbfe..7cefe2235 100644
--- a/js/Feeds.js
+++ b/js/Feeds.js
@@ -558,7 +558,7 @@ const	Feeds = {
 			return tree.model.store.getValue(nuf, 'bare_id');
 	},
 	search: function() {
-		xhrJson("backend.php",
+		xhr.json("backend.php",
 					{op: "feeds", method: "search"},
 					(reply) => {
 						try {
diff --git a/js/PrefFeedTree.js b/js/PrefFeedTree.js
index 92194e037..c7228e6ff 100644
--- a/js/PrefFeedTree.js
+++ b/js/PrefFeedTree.js
@@ -210,14 +210,14 @@ define(["dojo/_base/declare", "dojo/dom-construct", "lib/CheckBoxTree", "dojo/_b
 			return false;
 		},
 		checkErrorFeeds: function() {
-			xhrJson("backend.php", {op: "pref-feeds", method: "feedsWithErrors"}, (reply) => {
+			xhr.json("backend.php", {op: "pref-feeds", method: "feedsWithErrors"}, (reply) => {
 				if (reply.length > 0) {
 					Element.show(dijit.byId("pref_feeds_errors_btn").domNode);
 				}
 			});
 		},
 		checkInactiveFeeds: function() {
-			xhrJson("backend.php", {op: "pref-feeds", method: "inactivefeeds"}, (reply) => {
+			xhr.json("backend.php", {op: "pref-feeds", method: "inactivefeeds"}, (reply) => {
 				if (reply.length > 0) {
 					Element.show(dijit.byId("pref_feeds_inactive_btn").domNode);
 				}
@@ -385,7 +385,7 @@ define(["dojo/_base/declare", "dojo/dom-construct", "lib/CheckBoxTree", "dojo/_b
 			}
 		},
 		batchSubscribe: function() {
-			xhrJson("backend.php", {op: 'pref-feeds', method: 'batchSubscribe'}, (reply) => {
+			xhr.json("backend.php", {op: 'pref-feeds', method: 'batchSubscribe'}, (reply) => {
 				const dialog = new fox.SingleUseDialog({
 					id: "batchSubDlg",
 					title: __("Batch subscribe"),
@@ -458,7 +458,7 @@ define(["dojo/_base/declare", "dojo/dom-construct", "lib/CheckBoxTree", "dojo/_b
 			});
 		},
 		showInactiveFeeds: function() {
-			xhrJson("backend.php", {op: 'pref-feeds', method: 'inactivefeeds'}, function (reply) {
+			xhr.json("backend.php", {op: 'pref-feeds', method: 'inactivefeeds'}, function (reply) {
 
 				const dialog = new fox.SingleUseDialog({
 					id: "inactiveFeedsDlg",
diff --git a/js/PrefHelpers.js b/js/PrefHelpers.js
index d4db15c3b..c17966291 100644
--- a/js/PrefHelpers.js
+++ b/js/PrefHelpers.js
@@ -132,7 +132,7 @@ const	Helpers = {
 					}
 				},
 				refresh: function() {
-					xhrJson("backend.php", {op: 'pref-prefs', method: 'getprofiles'}, (reply) => {
+					xhr.json("backend.php", {op: 'pref-prefs', method: 'getprofiles'}, (reply) => {
 						dialog.attr('content', `
 							<div dojoType='fox.Toolbar'>
 								<div dojoType='fox.form.DropDownButton'>
@@ -212,7 +212,7 @@ const	Helpers = {
 	},
 	Prefs: {
 		customizeCSS: function() {
-			xhrJson("backend.php", {op: "pref-prefs", method: "customizeCSS"}, (reply) => {
+			xhr.json("backend.php", {op: "pref-prefs", method: "customizeCSS"}, (reply) => {
 
 				const dialog = new fox.SingleUseDialog({
 					title: __("Customize stylesheet"),
diff --git a/js/PrefLabelTree.js b/js/PrefLabelTree.js
index 4392dfc44..9d16a147c 100644
--- a/js/PrefLabelTree.js
+++ b/js/PrefLabelTree.js
@@ -61,7 +61,7 @@ define(["dojo/_base/declare", "dojo/dom-construct", "lib/CheckBoxTree", "dijit/f
 			});
 		},
 		editLabel: function(id) {
-			xhrJson("backend.php", {op: "pref-labels", method: "edit", id: id}, (reply) => {
+			xhr.json("backend.php", {op: "pref-labels", method: "edit", id: id}, (reply) => {
 
 				console.log(reply);
 
diff --git a/js/PrefUsers.js b/js/PrefUsers.js
index 64466ef18..5b490a2a5 100644
--- a/js/PrefUsers.js
+++ b/js/PrefUsers.js
@@ -27,7 +27,7 @@ const	Users = {
 		}
 	},
 	edit: function(id) {
-		xhrJson('backend.php', {op: 'pref-users', method: 'edit', id: id}, (reply) => {
+		xhr.json('backend.php', {op: 'pref-users', method: 'edit', id: id}, (reply) => {
 			const user = reply.user;
 			const admin_disabled = (user.id == 1);
 
diff --git a/js/common.js b/js/common.js
index dbe1ae3c3..f3fcdd905 100755
--- a/js/common.js
+++ b/js/common.js
@@ -143,7 +143,7 @@ String.prototype.stripTags = function() {
 
 const xhr = {
 	post: function(url, params = {}, complete = undefined) {
-		console.log("xhr.post:", params);
+		console.log('xhr.post', '>>>', params);
 
 		return new Promise((resolve, reject) => {
 			if (typeof __csrf_token != "undefined")
@@ -156,6 +156,8 @@ const xhr = {
 					reject(error);
 				},
 				load: function(data, ioargs) {
+					//console.log('xhr.post', '<<<', data, ioargs);
+
 					if (complete != undefined)
 						complete(data, ioargs.xhr);
 
@@ -176,6 +178,8 @@ const xhr = {
 					reject(e);
 				}
 
+				console.log('xhr.json', '<<<', obj);
+
 				if (complete != undefined) complete(obj);
 
 				resolve(obj);
@@ -209,21 +213,7 @@ function xhrPost(url, params = {}, complete = undefined) {
 
 /* exported xhrJson */
 function xhrJson(url, params = {}, complete = undefined) {
-	return new Promise((resolve, reject) =>
-		xhrPost(url, params).then((reply) => {
-			let obj = null;
-
-			try {
-				obj = JSON.parse(reply.responseText);
-			} catch (e) {
-				console.error("xhrJson", e, reply);
-				reject(e);
-			}
-
-			if (complete != undefined) complete(obj);
-
-			resolve(obj);
-		}));
+	return xhr.json(url, params, complete);
 }
 
 /* common helpers not worthy of separate Dojo modules */
diff --git a/plugins/af_readability/init.js b/plugins/af_readability/init.js
index 6dec82f45..5297416b3 100644
--- a/plugins/af_readability/init.js
+++ b/plugins/af_readability/init.js
@@ -16,7 +16,7 @@ Plugins.Af_Readability = {
 
         Notify.progress("Loading, please wait...");
 
-        xhrJson("backend.php", App.getPhArgs("af_readability", "embed", {id: id}), (reply) => {
+        xhr.json("backend.php", App.getPhArgs("af_readability", "embed", {id: id}), (reply) => {
 
             if (content && reply.content) {
                 content.setAttribute(self.orig_attr_name, content.innerHTML);
diff --git a/plugins/mail/init.php b/plugins/mail/init.php
index d96006b21..16e22f342 100644
--- a/plugins/mail/init.php
+++ b/plugins/mail/init.php
@@ -152,7 +152,7 @@ class Mail extends Plugin {
 			<script type='dojo/method' event='onSubmit' args='evt'>
 				evt.preventDefault();
 				if (this.validate()) {
-					xhrJson("backend.php", this.getValues(), (reply) => {
+					xhr.json("backend.php", this.getValues(), (reply) => {
 						if (reply && reply.error)
 							Notify.error(reply.error);
 						else
diff --git a/plugins/mail/mail.js b/plugins/mail/mail.js
index 36b0baac5..fc0898085 100644
--- a/plugins/mail/mail.js
+++ b/plugins/mail/mail.js
@@ -17,7 +17,7 @@ Plugins.Mail = {
 			title: __("Forward article by email"),
 			execute: function () {
 				if (this.validate()) {
-					xhrJson("backend.php", this.attr('value'), (reply) => {
+					xhr.json("backend.php", this.attr('value'), (reply) => {
 						if (reply) {
 							const error = reply['error'];
 
diff --git a/plugins/note/note.js b/plugins/note/note.js
index d2d9c2b01..36bc426cd 100644
--- a/plugins/note/note.js
+++ b/plugins/note/note.js
@@ -8,7 +8,7 @@ Plugins.Note = {
 				if (this.validate()) {
 					Notify.progress("Saving article note...", true);
 
-					xhrJson("backend.php", this.attr('value'), (reply) => {
+					xhr.json("backend.php", this.attr('value'), (reply) => {
 						Notify.close();
 						dialog.hide();
 
diff --git a/plugins/share/share.js b/plugins/share/share.js
index a5f60d267..d7b8cd1f9 100644
--- a/plugins/share/share.js
+++ b/plugins/share/share.js
@@ -10,7 +10,7 @@ Plugins.Share = {
 
 					Notify.progress("Trying to change URL...", true);
 
-					xhrJson("backend.php", App.getPhArgs("share", "newkey", {id: id}), (reply) => {
+					xhr.json("backend.php", App.getPhArgs("share", "newkey", {id: id}), (reply) => {
 						if (reply) {
 							const new_link = reply.link;
 							const target = dialog.domNode.querySelector(".target-url");
-- 
cgit v1.2.3-54-g00ecf

From e4107ac9520ca404d4ab49ef79ca74430e8fd772 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Mon, 22 Feb 2021 21:47:48 +0300
Subject: wip: initial for config object

(limited to 'include/login_form.php')

diff --git a/backend.php b/backend.php
index b6b3e0030..2237c06b3 100644
--- a/backend.php
+++ b/backend.php
@@ -40,7 +40,7 @@
 
 	header("Content-Type: text/json; charset=utf-8");
 
-	if (SINGLE_USER_MODE) {
+	if (Config::get(Config::SINGLE_USER_MODE)) {
 		UserHelper::authenticate( "admin", null);
 	}
 
diff --git a/classes/api.php b/classes/api.php
index 5677cb908..6f3ee77db 100755
--- a/classes/api.php
+++ b/classes/api.php
@@ -57,7 +57,7 @@ class API extends Handler {
 		$password = clean($_REQUEST["password"]);
 		$password_base64 = base64_decode(clean($_REQUEST["password"]));
 
-		if (SINGLE_USER_MODE) $login = "admin";
+		if (Config::get(Config::SINGLE_USER_MODE)) $login = "admin";
 
 		if ($uid = UserHelper::find_user_by_login($login)) {
 			if (get_pref("ENABLE_API_ACCESS", $uid)) {
@@ -361,9 +361,10 @@ class API extends Handler {
 	}
 
 	function getConfig() {
-		$config = array(
-			"icons_dir" => ICONS_DIR,
-			"icons_url" => ICONS_URL);
+		$config = [
+			"icons_dir" => Config::get(Config::ICONS_DIR),
+			"icons_url" => Config::get(Config::ICONS_URL)
+		];
 
 		$config["daemon_is_running"] = file_is_locked("update_daemon.lock");
 
diff --git a/classes/article.php b/classes/article.php
index acd83694c..a2a38118b 100755
--- a/classes/article.php
+++ b/classes/article.php
@@ -85,7 +85,7 @@ class Article extends Handler_Protected {
 					content = ?, content_hash = ? WHERE id = ?");
 				$sth->execute([$content, $content_hash, $ref_id]);
 
-				if (DB_TYPE == "pgsql"){
+				if (Config::get(Config::DB_TYPE) == "pgsql") {
 					$sth = $pdo->prepare("UPDATE ttrss_entries
 					SET tsvector_combined = to_tsvector( :ts_content)
 					WHERE id = :id");
@@ -130,7 +130,7 @@ class Article extends Handler_Protected {
 
 			if ($row = $sth->fetch()) {
 				$ref_id = $row["id"];
-				if (DB_TYPE == "pgsql"){
+				if (Config::get(Config::DB_TYPE) == "pgsql"){
 					$sth = $pdo->prepare("UPDATE ttrss_entries
 					SET tsvector_combined = to_tsvector( :ts_content)
 					WHERE id = :id");
@@ -475,7 +475,7 @@ class Article extends Handler_Protected {
 
         // purge orphaned posts in main content table
 
-        if (DB_TYPE == "mysql")
+        if (Config::get(Config::DB_TYPE) == "mysql")
             $limit_qpart = "LIMIT 5000";
         else
             $limit_qpart = "";
diff --git a/classes/db.php b/classes/db.php
index 490cecd57..1ccaa3533 100755
--- a/classes/db.php
+++ b/classes/db.php
@@ -21,9 +21,9 @@ class Db
 		$db_host = defined('DB_HOST') && DB_HOST ? ';host=' . DB_HOST : '';
 
 		try {
-			$pdo = new PDO(DB_TYPE . ':dbname=' . DB_NAME . $db_host . $db_port,
-				DB_USER,
-				DB_PASS);
+			$pdo = new PDO(Config::get(Config::DB_TYPE) . ':dbname=' . Config::get(Config::DB_NAME) . $db_host . $db_port,
+				Config::get(Config::DB_USER),
+				Config::get(Config::DB_PASS));
 		} catch (Exception $e) {
 			print "<pre>Exception while creating PDO object:" . $e->getMessage() . "</pre>";
 			exit(101);
@@ -31,14 +31,14 @@ class Db
 
 		$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 
 			$pdo->query("set client_encoding = 'UTF-8'");
 			$pdo->query("set datestyle = 'ISO, european'");
 			$pdo->query("set TIME ZONE 0");
 			$pdo->query("set cpu_tuple_cost = 0.5");
 
-		} else if (DB_TYPE == "mysql") {
+		} else if (Config::get(Config::DB_TYPE) == "mysql") {
 			$pdo->query("SET time_zone = '+0:0'");
 
 			if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
@@ -68,7 +68,7 @@ class Db
 	}
 
 	public static function sql_random_function() {
-		if (DB_TYPE == "mysql") {
+		if (Config::get(Config::DB_TYPE) == "mysql") {
 			return "RAND()";
 		} else {
 			return "RANDOM()";
diff --git a/classes/digest.php b/classes/digest.php
index e0c23d705..9ac3f6a17 100644
--- a/classes/digest.php
+++ b/classes/digest.php
@@ -8,9 +8,9 @@ class Digest
 
 		Debug::log("Sending digests, batch of max $user_limit users, headline limit = $limit");
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$interval_qpart = "last_digest_sent < NOW() - INTERVAL '1 days'";
-		} else /* if (DB_TYPE == "mysql") */ {
+		} else /* if (Config::get(Config::DB_TYPE) == "mysql") */ {
 			$interval_qpart = "last_digest_sent < DATE_SUB(NOW(), INTERVAL 1 DAY)";
 		}
 
@@ -91,19 +91,19 @@ class Digest
 
 		$tpl->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);
+		$tpl->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
 
 		$tpl_t->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl_t->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl_t->setVariable('TTRSS_HOST', SELF_URL_PATH);
+		$tpl_t->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
 
 		$affected_ids = array();
 
 		$days = (int) $days;
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$interval_qpart = "ttrss_entries.date_updated > NOW() - INTERVAL '$days days'";
-		} else /* if (DB_TYPE == "mysql") */ {
+		} else /* if (Config::get(Config::DB_TYPE) == "mysql") */ {
 			$interval_qpart = "ttrss_entries.date_updated > DATE_SUB(NOW(), INTERVAL $days DAY)";
 		}
 
diff --git a/classes/diskcache.php b/classes/diskcache.php
index 94f645f32..063a3847c 100644
--- a/classes/diskcache.php
+++ b/classes/diskcache.php
@@ -191,7 +191,7 @@ class DiskCache {
 	];
 
 	public function __construct($dir) {
-		$this->dir = CACHE_DIR . "/" . basename(clean($dir));
+		$this->dir = Config::get(Config::CACHE_DIR) . "/" . basename(clean($dir));
 	}
 
 	public function get_dir() {
@@ -339,7 +339,7 @@ class DiskCache {
 	}
 
 	static function expire() {
-		$dirs = array_filter(glob(CACHE_DIR . "/*"), "is_dir");
+		$dirs = array_filter(glob(Config::get(Config::CACHE_DIR) . "/*"), "is_dir");
 
 		foreach ($dirs as $cache_dir) {
 			$num_deleted = 0;
@@ -396,7 +396,7 @@ class DiskCache {
 
 			$tmppluginhost = new PluginHost();
 
-			$tmppluginhost->load(PLUGINS, PluginHost::KIND_SYSTEM);
+			$tmppluginhost->load(Config::get(Config::PLUGINS), PluginHost::KIND_SYSTEM);
 			//$tmppluginhost->load_data();
 
 			if ($tmppluginhost->run_hooks_until(PluginHost::HOOK_SEND_LOCAL_FILE, true, $filename))
diff --git a/classes/feeditem/common.php b/classes/feeditem/common.php
index f387e0779..8f2b9188b 100755
--- a/classes/feeditem/common.php
+++ b/classes/feeditem/common.php
@@ -179,7 +179,7 @@ abstract class FeedItem_Common extends FeedItem {
 
 			$cat = preg_replace('/[,\'\"]/', "", $cat);
 
-			if (DB_TYPE == "mysql") {
+			if (Config::get(Config::DB_TYPE) == "mysql") {
 				$cat = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $cat);
 			}
 
diff --git a/classes/feeds.php b/classes/feeds.php
index b59504c03..274cb22d0 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -186,7 +186,7 @@ class Feeds extends Handler_Protected {
 				$id = $line["id"];
 
 				// frontend doesn't expect pdo returning booleans as strings on mysql
-				if (DB_TYPE == "mysql") {
+				if (Config::get(Config::DB_TYPE) == "mysql") {
 					foreach (["unread", "marked", "published"] as $k) {
 						$line[$k] = $line[$k] === "1";
 					}
@@ -576,7 +576,7 @@ class Feeds extends Handler_Protected {
 
 	function search() {
 		print json_encode([
-			"show_language" => DB_TYPE == "pgsql",
+			"show_language" => Config::get(Config::DB_TYPE) == "pgsql",
 			"show_syntax_help" => count(PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SEARCH)) == 0,
 			"all_languages" => Pref_Feeds::get_ts_languages(),
 			"default_language" => get_pref('DEFAULT_SEARCH_LANGUAGE')
@@ -716,21 +716,21 @@ class Feeds extends Handler_Protected {
 
 		switch ($mode) {
 			case "1day":
-				if (DB_TYPE == "pgsql") {
+				if (Config::get(Config::DB_TYPE) == "pgsql") {
 					$date_qpart = "date_entered < NOW() - INTERVAL '1 day' ";
 				} else {
 					$date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 DAY) ";
 				}
 				break;
 			case "1week":
-				if (DB_TYPE == "pgsql") {
+				if (Config::get(Config::DB_TYPE) == "pgsql") {
 					$date_qpart = "date_entered < NOW() - INTERVAL '1 week' ";
 				} else {
 					$date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 WEEK) ";
 				}
 				break;
 			case "2week":
-				if (DB_TYPE == "pgsql") {
+				if (Config::get(Config::DB_TYPE) == "pgsql") {
 					$date_qpart = "date_entered < NOW() - INTERVAL '2 week' ";
 				} else {
 					$date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 2 WEEK) ";
@@ -807,7 +807,7 @@ class Feeds extends Handler_Protected {
 
 					$intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE");
 
-					if (DB_TYPE == "pgsql") {
+					if (Config::get(Config::DB_TYPE) == "pgsql") {
 						$match_part = "date_entered > NOW() - INTERVAL '$intl hour' ";
 					} else {
 						$match_part = "date_entered > DATE_SUB(NOW(),
@@ -900,7 +900,7 @@ class Feeds extends Handler_Protected {
 
 			$intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$match_part .= " AND date_entered > NOW() - INTERVAL '$intl hour' ";
 			} else {
 				$match_part .= " AND date_entered > DATE_SUB(NOW(), INTERVAL $intl HOUR) ";
@@ -1332,7 +1332,7 @@ class Feeds extends Handler_Protected {
 				list($search_query_part, $search_words) = self::_search_to_sql($search, $search_language, $owner_uid);
 			}
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$test_sth = $pdo->prepare("select $search_query_part
 					FROM ttrss_entries, ttrss_user_entries WHERE id = ref_id limit 1");
 
@@ -1469,7 +1469,7 @@ class Feeds extends Handler_Protected {
 		} else if ($feed == -6) { // recently read
 			$query_strategy_part = "unread = false AND last_read IS NOT NULL";
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$query_strategy_part .= " AND last_read > NOW() - INTERVAL '1 DAY' ";
 			} else {
 				$query_strategy_part .= " AND last_read > DATE_SUB(NOW(), INTERVAL 1 DAY) ";
@@ -1486,7 +1486,7 @@ class Feeds extends Handler_Protected {
 
 			$intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$query_strategy_part .= " AND date_entered > NOW() - INTERVAL '$intl hour' ";
 			} else {
 				$query_strategy_part .= " AND date_entered > DATE_SUB(NOW(), INTERVAL $intl HOUR) ";
@@ -1605,7 +1605,7 @@ class Feeds extends Handler_Protected {
 			if ($feed == -3)
 				$first_id_query_strategy_part = "true";
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$sanity_interval_qpart = "date_entered >= NOW() - INTERVAL '1 hour' AND";
 				$yyiw_qpart = "to_char(date_entered, 'IYYY-IW') AS yyiw";
 
@@ -1705,7 +1705,7 @@ class Feeds extends Handler_Protected {
 		} else {
 			// browsing by tag
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$distinct_columns = str_replace("desc", "", strtolower($order_by));
 				$distinct_qpart = "DISTINCT ON (id, $distinct_columns)";
 			} else {
@@ -1948,10 +1948,10 @@ class Feeds extends Handler_Protected {
 		if ($row = $sth->fetch()) {
 			$owner_uid = $row["owner_uid"];
 
-			if (FORCE_ARTICLE_PURGE != 0) {
-				Debug::log("purge_feed: FORCE_ARTICLE_PURGE is set, overriding interval to " . FORCE_ARTICLE_PURGE, Debug::$LOG_VERBOSE);
+			if (Config::get(Config::FORCE_ARTICLE_PURGE) != 0) {
+				Debug::log("purge_feed: FORCE_ARTICLE_PURGE is set, overriding interval to " . Config::get(Config::FORCE_ARTICLE_PURGE), Debug::$LOG_VERBOSE);
 				$purge_unread = true;
-				$purge_interval = FORCE_ARTICLE_PURGE;
+				$purge_interval = Config::get(Config::FORCE_ARTICLE_PURGE);
 			} else {
 				$purge_unread = get_pref("PURGE_UNREAD_ARTICLES", $owner_uid, false);
 			}
@@ -1970,7 +1970,7 @@ class Feeds extends Handler_Protected {
 			else
 				$query_limit = "";
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$sth = $pdo->prepare("DELETE FROM ttrss_user_entries
 					USING ttrss_entries
 					WHERE ttrss_entries.id = ref_id AND
@@ -2153,7 +2153,7 @@ class Feeds extends Handler_Protected {
 						array_push($query_keywords, "(".SUBSTRING_FOR_DATE."(updated,1,LENGTH('$k')) $not = '$k')");
 					} else {
 
-						if (DB_TYPE == "pgsql") {
+						if (Config::get(Config::DB_TYPE) == "pgsql") {
 							$k = mb_strtolower($k);
 							array_push($search_query_leftover, $not ? "!$k" : $k);
 						} else {
@@ -2168,7 +2168,7 @@ class Feeds extends Handler_Protected {
 
 		if (count($search_query_leftover) > 0) {
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 
 				// if there's no joiners consider this a "simple" search and
 				// concatenate everything with &, otherwise don't try to mess with tsquery syntax
diff --git a/classes/handler/public.php b/classes/handler/public.php
index 3910cf7c1..79dff37b5 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -43,7 +43,7 @@ class Handler_Public extends Handler {
 			$user_plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
 
 			$tmppluginhost = new PluginHost();
-			$tmppluginhost->load(PLUGINS, PluginHost::KIND_ALL);
+			$tmppluginhost->load(Config::get(Config::PLUGINS), PluginHost::KIND_ALL);
 			$tmppluginhost->load((string)$user_plugins, PluginHost::KIND_USER, $owner_uid);
 			//$tmppluginhost->load_data();
 
@@ -309,7 +309,7 @@ class Handler_Public extends Handler {
 		$format = clean($_REQUEST['format'] ?? "atom");
 		$orig_guid = clean($_REQUEST["orig_guid"] ?? false);
 
-		if (SINGLE_USER_MODE) {
+		if (Config::get(Config::SINGLE_USER_MODE)) {
 			UserHelper::authenticate("admin", null);
 		}
 
@@ -347,7 +347,7 @@ class Handler_Public extends Handler {
 	}
 
 	function login() {
-		if (!SINGLE_USER_MODE) {
+		if (!Config::get(Config::SINGLE_USER_MODE)) {
 
 			$login = clean($_POST["login"]);
 			$password = clean($_POST["password"]);
@@ -355,7 +355,7 @@ class Handler_Public extends Handler {
 			$safe_mode = checkbox_to_sql_bool(clean($_POST["safe_mode"] ?? false));
 
 			if ($remember_me) {
-				@session_set_cookie_params(SESSION_COOKIE_LIFETIME);
+				@session_set_cookie_params(Config::get(Config::SESSION_COOKIE_LIFETIME));
 			} else {
 				@session_set_cookie_params(0);
 			}
@@ -398,7 +398,7 @@ class Handler_Public extends Handler {
 
 			$return = clean($_REQUEST['return']);
 
-			if ($_REQUEST['return'] && mb_strpos($return, SELF_URL_PATH) === 0) {
+			if ($_REQUEST['return'] && mb_strpos($return, Config::get(Config::SELF_URL_PATH)) === 0) {
 				header("Location: " . clean($_REQUEST['return']));
 			} else {
 				header("Location: " . get_self_url_prefix());
@@ -559,7 +559,7 @@ class Handler_Public extends Handler {
 
 						$tpl->setVariable('LOGIN', $login);
 						$tpl->setVariable('RESETPASS_LINK', $resetpass_link);
-						$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);
+						$tpl->setVariable('TTRSS_HOST', Config::get(Config::SELF_URL_PATH));
 
 						$tpl->addBlock('message');
 
@@ -613,7 +613,7 @@ class Handler_Public extends Handler {
 	function dbupdate() {
 		startup_gettext();
 
-		if (!SINGLE_USER_MODE && $_SESSION["access_level"] < 10) {
+		if (!Config::get(Config::SINGLE_USER_MODE) && $_SESSION["access_level"] < 10) {
 			$_SESSION["login_error_msg"] = __("Your access level is insufficient to run this script.");
 			$this->_render_login_form();
 			exit;
@@ -660,7 +660,7 @@ class Handler_Public extends Handler {
 
 			<?php
 				@$op = clean($_REQUEST["subop"]);
-				$updater = new DbUpdater(Db::pdo(), DB_TYPE, SCHEMA_VERSION);
+				$updater = new DbUpdater(Db::pdo(), Config::get(Config::DB_TYPE), SCHEMA_VERSION);
 
 				if ($op == "performupdate") {
 					if ($updater->is_update_required()) {
@@ -709,7 +709,7 @@ class Handler_Public extends Handler {
 						print "<h2>".T_sprintf("Tiny Tiny RSS database needs update to the latest version (%d to %d).",
 							$updater->get_schema_version(), SCHEMA_VERSION)."</h2>";
 
-						if (DB_TYPE == "mysql") {
+						if (Config::get(Config::DB_TYPE) == "mysql") {
 							print_error("<strong>READ THIS:</strong> Due to MySQL limitations, your database is not completely protected while updating. ".
 								"Errors may put it in an inconsistent state requiring manual rollback. <strong>BACKUP YOUR DATABASE BEFORE CONTINUING.</strong>");
 						} else {
diff --git a/classes/opml.php b/classes/opml.php
index 04d287125..cbc1269e3 100644
--- a/classes/opml.php
+++ b/classes/opml.php
@@ -594,7 +594,7 @@ class OPML extends Handler_Protected {
 		}
 
 		if (is_uploaded_file($_FILES['opml_file']['tmp_name'])) {
-			$tmp_file = (string)tempnam(CACHE_DIR . '/upload', 'opml');
+			$tmp_file = (string)tempnam(Config::get(Config::CACHE_DIR) . '/upload', 'opml');
 
 			$result = move_uploaded_file($_FILES['opml_file']['tmp_name'],
 				$tmp_file);
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index e583a5f51..229effeb3 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -9,7 +9,7 @@ class Pref_Feeds extends Handler_Protected {
 	public static function get_ts_languages() {
 		$rv = [];
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$dbh = Db::pdo();
 
 			$res = $dbh->query("SELECT cfgname FROM pg_ts_config");
@@ -453,7 +453,7 @@ class Pref_Feeds extends Handler_Protected {
 		header("Content-type: text/html");
 
 		if (is_uploaded_file($_FILES['icon_file']['tmp_name'])) {
-			$tmp_file = tempnam(CACHE_DIR . '/upload', 'icon');
+			$tmp_file = tempnam(Config::get(Config::CACHE_DIR) . '/upload', 'icon');
 
 			if (!$tmp_file)
 				return;
@@ -529,7 +529,7 @@ class Pref_Feeds extends Handler_Protected {
 			$local_update_intervals = $update_intervals;
 			$local_update_intervals[0] .= sprintf(" (%s)", $update_intervals[get_pref("DEFAULT_UPDATE_INTERVAL")]);
 
-			if (FORCE_ARTICLE_PURGE == 0) {
+			if (Config::get(Config::FORCE_ARTICLE_PURGE) == 0) {
 				$local_purge_intervals = $purge_intervals;
 				$default_purge_interval = get_pref("PURGE_OLD_DAYS");
 
@@ -539,7 +539,7 @@ class Pref_Feeds extends Handler_Protected {
 				$local_purge_intervals[0] .= " " . sprintf("(%s)", __("Disabled"));
 
 			} else {
-				$purge_interval = FORCE_ARTICLE_PURGE;
+				$purge_interval = Config::get(Config::FORCE_ARTICLE_PURGE);
 				$local_purge_intervals = [ T_nsprintf('%d day', '%d days', $purge_interval, $purge_interval) ];
 			}
 
@@ -550,13 +550,13 @@ class Pref_Feeds extends Handler_Protected {
 					"select" => \Controls\select_feeds_cats("cat_id", $row["cat_id"]),
 				],
 				"plugin_data" => $plugin_data,
-				"force_purge" => (int)FORCE_ARTICLE_PURGE,
+				"force_purge" => (int)Config::get(Config::FORCE_ARTICLE_PURGE),
 				"intervals" => [
 					"update" => $local_update_intervals,
 					"purge" => $local_purge_intervals,
 				],
 				"lang" => [
-					"enabled" => DB_TYPE == "pgsql",
+					"enabled" => Config::get(Config::DB_TYPE) == "pgsql",
 					"default" => get_pref('DEFAULT_SEARCH_LANGUAGE'),
 					"all" => $this::get_ts_languages(),
 					]
@@ -614,7 +614,7 @@ class Pref_Feeds extends Handler_Protected {
 					</fieldset>
 				<?php } ?>
 
-				<?php	if (DB_TYPE == "pgsql") { ?>
+				<?php	if (Config::get(Config::DB_TYPE) == "pgsql") { ?>
 					<fieldset>
 						<label><?= __('Language:') ?></label>
 						<?= \Controls\select_tag("feed_language", "", $this::get_ts_languages(), ["disabled"=> 1]) ?>
@@ -632,7 +632,7 @@ class Pref_Feeds extends Handler_Protected {
 						<?= $this->_batch_toggle_checkbox("update_interval") ?>
 					</fieldset>
 
-					<?php if (FORCE_ARTICLE_PURGE == 0) { ?>
+					<?php if (Config::get(Config::FORCE_ARTICLE_PURGE) == 0) { ?>
 						<fieldset>
 							<label><?= __('Article purging:') ?></label>
 							<?= \Controls\select_hash("purge_interval", "", $local_purge_intervals, ["disabled" => 1]) ?>
@@ -1147,7 +1147,7 @@ class Pref_Feeds extends Handler_Protected {
 
 	function inactiveFeeds() {
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$interval_qpart = "NOW() - INTERVAL '3 months'";
 		} else {
 			$interval_qpart = "DATE_SUB(NOW(), INTERVAL 3 MONTH)";
diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index adb249dac..1ca5b28be 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -236,7 +236,7 @@ class Pref_Prefs extends Handler_Protected {
 
 				$tpl->setVariable('LOGIN', $row["login"]);
 				$tpl->setVariable('NEWMAIL', $email);
-				$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);
+				$tpl->setVariable('TTRSS_HOST', Config::get(Config::SELF_URL_PATH));
 
 				$tpl->addBlock('message');
 
@@ -625,7 +625,7 @@ class Pref_Prefs extends Handler_Protected {
 					continue;
 				}
 
-				if ($pref_name == "DEFAULT_SEARCH_LANGUAGE" && DB_TYPE != "pgsql") {
+				if ($pref_name == "DEFAULT_SEARCH_LANGUAGE" && Config::get(Config::DB_TYPE) != "pgsql") {
 					continue;
 				}
 
@@ -705,7 +705,7 @@ class Pref_Prefs extends Handler_Protected {
 
 						array_push($listed_boolean_prefs, $pref_name);
 
-						if ($pref_name == "PURGE_UNREAD_ARTICLES" && FORCE_ARTICLE_PURGE != 0) {
+						if ($pref_name == "PURGE_UNREAD_ARTICLES" && Config::get(Config::FORCE_ARTICLE_PURGE) != 0) {
 							$is_disabled = true;
 							$is_checked = true;
 						} else {
@@ -719,9 +719,9 @@ class Pref_Prefs extends Handler_Protected {
 					} else if (in_array($pref_name, ['FRESH_ARTICLE_MAX_AGE',
 							'PURGE_OLD_DAYS', 'LONG_DATE_FORMAT', 'SHORT_DATE_FORMAT'])) {
 
-						if ($pref_name == "PURGE_OLD_DAYS" && FORCE_ARTICLE_PURGE != 0) {
+						if ($pref_name == "PURGE_OLD_DAYS" && Config::get(Config::FORCE_ARTICLE_PURGE) != 0) {
 							$attributes = ["disabled" => true, "required" => true];
-							$value = FORCE_ARTICLE_PURGE;
+							$value = Config::get(Config::FORCE_ARTICLE_PURGE);
 						} else {
 							$attributes = ["required" => true];
 						}
@@ -829,7 +829,7 @@ class Pref_Prefs extends Handler_Protected {
 	private function index_plugins_system() {
 		print_notice("System plugins are enabled in <strong>config.php</strong> for all users.");
 
-		$system_enabled = array_map("trim", explode(",", (string)PLUGINS));
+		$system_enabled = array_map("trim", explode(",", (string)Config::get(Config::PLUGINS)));
 
 		$tmppluginhost = new PluginHost();
 		$tmppluginhost->load_all($tmppluginhost::KIND_ALL, $_SESSION["uid"], true);
@@ -862,7 +862,7 @@ class Pref_Prefs extends Handler_Protected {
 	}
 
 	private function index_plugins_user() {
-		$system_enabled = array_map("trim", explode(",", (string)PLUGINS));
+		$system_enabled = array_map("trim", explode(",", (string)Config::get(Config::PLUGINS)));
 		$user_enabled = array_map("trim", explode(",", get_pref("_ENABLED_PLUGINS")));
 
 		$tmppluginhost = new PluginHost();
@@ -1135,7 +1135,7 @@ class Pref_Prefs extends Handler_Protected {
 				$tpl->readTemplateFromFile("otp_disabled_template.txt");
 
 				$tpl->setVariable('LOGIN', $row["login"]);
-				$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);
+				$tpl->setVariable('TTRSS_HOST', Config::get(Config::SELF_URL_PATH));
 
 				$tpl->addBlock('message');
 
diff --git a/classes/rpc.php b/classes/rpc.php
index 95fd0f5ae..bf24132b0 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -174,7 +174,7 @@ class RPC extends Handler_Protected {
 	static function updaterandomfeed_real() {
 
 		// Test if the feed need a update (update interval exceded).
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$update_limit_qpart = "AND ((
 					ttrss_feeds.update_interval = 0
 					AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_user_prefs.value || ' minutes') AS INTERVAL)
@@ -199,7 +199,7 @@ class RPC extends Handler_Protected {
 		}
 
 		// Test if feed is currently being updated by another process.
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < NOW() - INTERVAL '5 minutes')";
 		} else {
 			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < DATE_SUB(NOW(), INTERVAL 5 MINUTE))";
@@ -361,7 +361,7 @@ class RPC extends Handler_Protected {
 		$params["safe_mode"] = !empty($_SESSION["safe_mode"]);
 		$params["check_for_updates"] = CHECK_FOR_UPDATES;
 		$params["icons_url"] = ICONS_URL;
-		$params["cookie_lifetime"] = SESSION_COOKIE_LIFETIME;
+		$params["cookie_lifetime"] = Config::get(Config::SESSION_COOKIE_LIFETIME);
 		$params["default_view_mode"] = get_pref("_DEFAULT_VIEW_MODE");
 		$params["default_view_limit"] = (int) get_pref("_DEFAULT_VIEW_LIMIT");
 		$params["default_view_order_by"] = get_pref("_DEFAULT_VIEW_ORDER_BY");
@@ -433,7 +433,7 @@ class RPC extends Handler_Protected {
 		$data["labels"] = Labels::get_all($_SESSION["uid"]);
 
 		if (LOG_DESTINATION == 'sql' && $_SESSION['access_level'] >= 10) {
-			if (DB_TYPE == 'pgsql') {
+			if (Config::get(Config::DB_TYPE) == 'pgsql') {
 				$log_interval = "created_at > NOW() - interval '1 hour'";
 			} else {
 				$log_interval = "created_at > DATE_SUB(NOW(), INTERVAL 1 HOUR)";
@@ -452,13 +452,13 @@ class RPC extends Handler_Protected {
 			}
 		}
 
-		if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
+		if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon.lock")) {
 
 			$data['daemon_is_running'] = (int) file_is_locked("update_daemon.lock");
 
 			if (time() - ($_SESSION["daemon_stamp_check"] ?? 0) > 30) {
 
-				$stamp = (int) @file_get_contents(LOCK_DIRECTORY . "/update_daemon.stamp");
+				$stamp = (int) @file_get_contents(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon.stamp");
 
 				if ($stamp) {
 					$stamp_delta = time() - $stamp;
diff --git a/classes/rssutils.php b/classes/rssutils.php
index 30d08328f..c951003f0 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -61,8 +61,8 @@ class RSSUtils {
 
 		$pdo = Db::pdo();
 
-		if (!SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
-			if (DB_TYPE == "pgsql") {
+		if (!Config::get(Config::SINGLE_USER_MODE) && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
 			} else {
 				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
@@ -71,7 +71,7 @@ class RSSUtils {
 			$login_thresh_qpart = "";
 		}
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$update_limit_qpart = "AND ((
 					ttrss_feeds.update_interval = 0
 					AND ttrss_user_prefs.value != '-1'
@@ -96,7 +96,7 @@ class RSSUtils {
 		}
 
 		// Test if feed is currently being updated by another process.
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$updstart_thresh_qpart = "AND (last_update_started IS NULL OR last_update_started < NOW() - INTERVAL '10 minutes')";
 		} else {
 			$updstart_thresh_qpart = "AND (last_update_started IS NULL OR last_update_started < DATE_SUB(NOW(), INTERVAL 10 MINUTE))";
@@ -106,7 +106,7 @@ class RSSUtils {
 
 		// Update the least recently updated feeds first
 		$query_order = "ORDER BY last_updated";
-		if (DB_TYPE == "pgsql") $query_order .= " NULLS FIRST";
+		if (Config::get(Config::DB_TYPE) == "pgsql") $query_order .= " NULLS FIRST";
 
 		$query = "SELECT DISTINCT ttrss_feeds.feed_url, ttrss_feeds.last_updated
 			FROM
@@ -182,7 +182,7 @@ class RSSUtils {
 				if (self::function_enabled('passthru')) {
 					$exit_code = 0;
 
-					passthru(PHP_EXECUTABLE . " update.php --update-feed " . $tline["id"] . " --pidlock feed-" . $tline["id"] . " $quiet $log $log_level", $exit_code);
+					passthru(Config::get(Config::PHP_EXECUTABLE) . " update.php --update-feed " . $tline["id"] . " --pidlock feed-" . $tline["id"] . " $quiet $log $log_level", $exit_code);
 
 					Debug::log(sprintf("<= %.4f (sec) exit code: %d", microtime(true) - $fstarted, $exit_code));
 
@@ -275,7 +275,7 @@ class RSSUtils {
 			$pluginhost = new PluginHost();
 			$user_plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
 
-			$pluginhost->load(PLUGINS, PluginHost::KIND_ALL);
+			$pluginhost->load(Config::get(Config::PLUGINS), PluginHost::KIND_ALL);
 			$pluginhost->load((string)$user_plugins, PluginHost::KIND_USER, $owner_uid);
 			//$pluginhost->load_data();
 
@@ -395,12 +395,12 @@ class RSSUtils {
 
 		$date_feed_processed = date('Y-m-d H:i');
 
-		$cache_filename = CACHE_DIR . "/feeds/" . sha1($fetch_url) . ".xml";
+		$cache_filename = Config::get(Config::CACHE_DIR) . "/feeds/" . sha1($fetch_url) . ".xml";
 
 		$pluginhost = new PluginHost();
 		$user_plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
 
-		$pluginhost->load(PLUGINS, PluginHost::KIND_ALL);
+		$pluginhost->load(Config::get(Config::PLUGINS), PluginHost::KIND_ALL);
 		$pluginhost->load((string)$user_plugins, PluginHost::KIND_USER, $owner_uid);
 		//$pluginhost->load_data();
 
@@ -488,7 +488,7 @@ class RSSUtils {
 			}
 
 			// cache vanilla feed data for re-use
-			if ($feed_data && !$auth_pass && !$auth_login && is_writable(CACHE_DIR . "/feeds")) {
+			if ($feed_data && !$auth_pass && !$auth_login && is_writable(Config::get(Config::CACHE_DIR) . "/feeds")) {
 				$new_rss_hash = sha1($feed_data);
 
 				if ($new_rss_hash != $rss_hash) {
@@ -561,7 +561,7 @@ class RSSUtils {
 			Debug::log("language: $feed_language", Debug::$LOG_VERBOSE);
 			Debug::log("processing feed data...", Debug::$LOG_VERBOSE);
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$favicon_interval_qpart = "favicon_last_checked < NOW() - INTERVAL '12 hour'";
 			} else {
 				$favicon_interval_qpart = "favicon_last_checked < DATE_SUB(NOW(), INTERVAL 12 HOUR)";
@@ -755,7 +755,7 @@ class RSSUtils {
 							$e->type, $e->length, $e->title, $e->width, $e->height);
 
 						// Yet another episode of "mysql utf8_general_ci is gimped"
-						if (DB_TYPE == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+						if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
 							for ($i = 0; $i < count($e_item); $i++) {
 								if (is_string($e_item[$i])) {
 									$e_item[$i] = self::strip_utf8mb4($e_item[$i]);
@@ -833,7 +833,7 @@ class RSSUtils {
 				Debug::log("plugin data: $entry_plugin_data", Debug::$LOG_VERBOSE);
 
 				// Workaround: 4-byte unicode requires utf8mb4 in MySQL. See https://tt-rss.org/forum/viewtopic.php?f=1&t=3377&p=20077#p20077
-				if (DB_TYPE == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+				if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
 					foreach ($article as $k => $v) {
 						// i guess we'll have to take the risk of 4byte unicode labels & tags here
 						if (is_string($article[$k])) {
@@ -1079,7 +1079,7 @@ class RSSUtils {
 
 					Debug::log("resulting RID: $entry_ref_id, IID: $entry_int_id", Debug::$LOG_VERBOSE);
 
-					if (DB_TYPE == "pgsql")
+					if (Config::get(Config::DB_TYPE) == "pgsql")
 						$tsvector_qpart = "tsvector_combined = to_tsvector(:ts_lang, :ts_content),";
 					else
 						$tsvector_qpart = "";
@@ -1107,7 +1107,7 @@ class RSSUtils {
 						":lang" => $entry_language,
 						":id" => $ref_id];
 
-					if (DB_TYPE == "pgsql") {
+					if (Config::get(Config::DB_TYPE) == "pgsql") {
 						$params[":ts_lang"] = $feed_language;
 						$params[":ts_content"] = mb_substr(strip_tags($entry_title . " " . $entry_content), 0, 900000);
 					}
@@ -1375,7 +1375,7 @@ class RSSUtils {
 
 		$pdo = Db::pdo();
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$pdo->query("DELETE FROM ttrss_error_log
 				WHERE created_at < NOW() - INTERVAL '7 days'");
 		} else {
@@ -1396,8 +1396,8 @@ class RSSUtils {
 
 		$num_deleted = 0;
 
-		if (is_writable(LOCK_DIRECTORY)) {
-			$files = glob(LOCK_DIRECTORY . "/*.lock");
+		if (is_writable(Config::get(Config::LOCK_DIRECTORY))) {
+			$files = glob(Config::get(Config::LOCK_DIRECTORY) . "/*.lock");
 
 			if ($files) {
 				foreach ($files as $file) {
@@ -1589,9 +1589,9 @@ class RSSUtils {
 
 			$days = DAEMON_UNSUCCESSFUL_DAYS_LIMIT;
 
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$interval_query = "last_successful_update < NOW() - INTERVAL '$days days' AND last_updated > NOW() - INTERVAL '1 days'";
-			} else /* if (DB_TYPE == "mysql") */ {
+			} else /* if (Config::get(Config::DB_TYPE) == "mysql") */ {
 				$interval_query = "last_successful_update < DATE_SUB(NOW(), INTERVAL $days DAY) AND last_updated > DATE_SUB(NOW(), INTERVAL 1 DAY)";
 			}
 
diff --git a/classes/userhelper.php b/classes/userhelper.php
index 7fe1e5557..82a2fe05f 100644
--- a/classes/userhelper.php
+++ b/classes/userhelper.php
@@ -2,7 +2,7 @@
 class UserHelper {
 
 	static function authenticate(string $login = null, string $password = null, bool $check_only = false, string $service = null) {
-		if (!SINGLE_USER_MODE) {
+		if (!Config::get(Config::SINGLE_USER_MODE)) {
 			$user_id = false;
 			$auth_module = false;
 
@@ -88,7 +88,7 @@ class UserHelper {
 	static function login_sequence() {
 		$pdo = Db::pdo();
 
-		if (SINGLE_USER_MODE) {
+		if (Config::get(Config::SINGLE_USER_MODE)) {
 			@session_start();
 			self::authenticate("admin", null);
 			startup_gettext();
@@ -98,7 +98,7 @@ class UserHelper {
 
 			if (empty($_SESSION["uid"])) {
 
-				if (AUTH_AUTO_LOGIN && self::authenticate(null, null)) {
+				if (Config::get(Config::AUTH_AUTO_LOGIN) && self::authenticate(null, null)) {
 					$_SESSION["ref_schema_version"] = get_schema_version(true);
 				} else {
 					 self::authenticate(null, null, true);
diff --git a/include/autoload.php b/include/autoload.php
index c02923dba..19e00b9ea 100644
--- a/include/autoload.php
+++ b/include/autoload.php
@@ -1,6 +1,4 @@
 <?php
-	require_once "functions.php";
-
 	spl_autoload_register(function($class) {
 		$namespace = '';
 		$class_name = $class;
diff --git a/include/functions.php b/include/functions.php
index 7c4e32963..526c6058a 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -80,7 +80,9 @@
 
 	/* tunables end here */
 
-	if (DB_TYPE == "pgsql") {
+	require_once "autoload.php";
+
+	if (Config::get(Config::DB_TYPE) == "pgsql") {
 		define('SUBSTRING_FOR_DATE', 'SUBSTRING_FOR_DATE');
 	} else {
 		define('SUBSTRING_FOR_DATE', 'SUBSTRING');
@@ -375,9 +377,9 @@
 	}
 
 	function file_is_locked($filename) {
-		if (file_exists(LOCK_DIRECTORY . "/$filename")) {
+		if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/$filename")) {
 			if (function_exists('flock')) {
-				$fp = @fopen(LOCK_DIRECTORY . "/$filename", "r");
+				$fp = @fopen(Config::get(Config::LOCK_DIRECTORY) . "/$filename", "r");
 				if ($fp) {
 					if (flock($fp, LOCK_EX | LOCK_NB)) {
 						flock($fp, LOCK_UN);
@@ -397,11 +399,11 @@
 	}
 
 	function make_lockfile($filename) {
-		$fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
+		$fp = fopen(Config::get(Config::LOCK_DIRECTORY) . "/$filename", "w");
 
 		if ($fp && flock($fp, LOCK_EX | LOCK_NB)) {
 			$stat_h = fstat($fp);
-			$stat_f = stat(LOCK_DIRECTORY . "/$filename");
+			$stat_f = stat(Config::get(Config::LOCK_DIRECTORY) . "/$filename");
 
 			if (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
 				if ($stat_h["ino"] != $stat_f["ino"] ||
@@ -444,15 +446,15 @@
 	}
 
 	function is_prefix_https() {
-		return parse_url(SELF_URL_PATH, PHP_URL_SCHEME) == 'https';
+		return parse_url(Config::get(Config::SELF_URL_PATH), PHP_URL_SCHEME) == 'https';
 	}
 
-	// this returns SELF_URL_PATH sans ending slash
+	// this returns Config::get(Config::SELF_URL_PATH) sans ending slash
 	function get_self_url_prefix() {
-		if (strrpos(SELF_URL_PATH, "/") === strlen(SELF_URL_PATH)-1) {
-			return substr(SELF_URL_PATH, 0, strlen(SELF_URL_PATH)-1);
+		if (strrpos(Config::get(Config::SELF_URL_PATH), "/") === strlen(Config::get(Config::SELF_URL_PATH))-1) {
+			return substr(Config::get(Config::SELF_URL_PATH), 0, strlen(Config::get(Config::SELF_URL_PATH))-1);
 		} else {
-			return SELF_URL_PATH;
+			return Config::get(Config::SELF_URL_PATH);
 		}
 	}
 
@@ -467,7 +469,7 @@
 	} // function encrypt_password
 
 	function init_plugins() {
-		PluginHost::getInstance()->load(PLUGINS, PluginHost::KIND_ALL);
+		PluginHost::getInstance()->load(Config::get(Config::PLUGINS), PluginHost::KIND_ALL);
 
 		return true;
 	}
diff --git a/include/login_form.php b/include/login_form.php
index 211302a87..537c7f994 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -79,7 +79,7 @@
     	},
         bwLimitChange: function(elem) {
         	Cookie.set("ttrss_bwlimit", elem.checked,
-				<?php print SESSION_COOKIE_LIFETIME ?>);
+				<?php print Config::get(Config::SESSION_COOKIE_LIFETIME) ?>);
 	    }
     };
 
@@ -122,7 +122,7 @@
 					   onblur="UtilityApp.fetchProfiles()"
 					   value="<?= $_SESSION["fake_password"] ?? "" ?>"/>
 			</fieldset>
-			<?php if (strpos(PLUGINS, "auth_internal") !== false) { ?>
+			<?php if (strpos(Config::get(Config::PLUGINS), "auth_internal") !== false) { ?>
 				<fieldset class="align-right">
 					<a href="public.php?op=forgotpass"><?= __("I forgot my password") ?></a>
 				</fieldset>
@@ -161,7 +161,7 @@
 			<div dojoType="dijit.Tooltip" connectId="safe_mode_label" position="below" style="display:none">
 				<?= __("Uses default theme and prevents all plugins from loading."); ?>
 			</div>
-			<?php if (SESSION_COOKIE_LIFETIME > 0) { ?>
+			<?php if (Config::get(Config::SESSION_COOKIE_LIFETIME) > 0) { ?>
 
 				<fieldset class="narrow">
 					<label> </label>
diff --git a/include/sanity_check.php b/include/sanity_check.php
index 2786f012f..5efd23d98 100755
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -21,7 +21,7 @@
 
 		$sth = $pdo->prepare("SELECT engine, table_name FROM information_schema.tables WHERE
 				table_schema = ? AND table_name LIKE 'ttrss_%' AND engine != 'InnoDB'");
-		$sth->execute([DB_NAME]);
+		$sth->execute([Config::get(Config::DB_NAME)]);
 
 		$bad_tables = [];
 
@@ -44,8 +44,8 @@
 				array_push($errors, "Please copy config.php-dist to config.php");
 			}
 
-			if (strpos(PLUGINS, "auth_") === false) {
-				array_push($errors, "Please enable at least one authentication module via PLUGINS constant in config.php");
+			if (strpos(Config::get(Config::PLUGINS), "auth_") === false) {
+				array_push($errors, "Please enable at least one authentication module via Config::get(Config::PLUGINS) constant in config.php");
 			}
 
 			if (function_exists('posix_getuid') && posix_getuid() == 0) {
@@ -60,43 +60,25 @@
 				array_push($errors, "PHP UConverter class is missing, it's provided by the Internationalization (intl) module.");
 			}
 
-			if (CONFIG_VERSION != EXPECTED_CONFIG_VERSION) {
-				array_push($errors, "Configuration file (config.php) has incorrect version. Update it with new options from config.php-dist and set CONFIG_VERSION to the correct value.");
+			if (!is_writable(Config::get(Config::CACHE_DIR) . "/images")) {
+				array_push($errors, "Image cache is not writable (chmod -R 777 ".Config::get(Config::CACHE_DIR)."/images)");
 			}
 
-			if (!is_writable(CACHE_DIR . "/images")) {
-				array_push($errors, "Image cache is not writable (chmod -R 777 ".CACHE_DIR."/images)");
+			if (!is_writable(Config::get(Config::CACHE_DIR) . "/upload")) {
+				array_push($errors, "Upload cache is not writable (chmod -R 777 ".Config::get(Config::CACHE_DIR)."/upload)");
 			}
 
-			if (!is_writable(CACHE_DIR . "/upload")) {
-				array_push($errors, "Upload cache is not writable (chmod -R 777 ".CACHE_DIR."/upload)");
+			if (!is_writable(Config::get(Config::CACHE_DIR) . "/export")) {
+				array_push($errors, "Data export cache is not writable (chmod -R 777 ".Config::get(Config::CACHE_DIR)."/export)");
 			}
 
-			if (!is_writable(CACHE_DIR . "/export")) {
-				array_push($errors, "Data export cache is not writable (chmod -R 777 ".CACHE_DIR."/export)");
-			}
-
-			require_once "sanity_config.php";
-
-			if (GENERATED_CONFIG_CHECK != EXPECTED_CONFIG_VERSION) {
-				array_push($errors,
-					"Configuration option checker sanity_config.php is outdated, please recreate it using ./utils/regen_config_checks.sh");
-			}
-
-			foreach (get_required_defines() as $d) {
-				if (!defined($d)) {
-					array_push($errors,
-						"Required configuration file parameter $d is not defined in config.php. You might need to copy it from config.php-dist.");
-				}
-			}
-
-			if (SINGLE_USER_MODE && class_exists("PDO")) {
+			if (Config::get(Config::SINGLE_USER_MODE) && class_exists("PDO")) {
 			    $pdo = Db::pdo();
 
 				$res = $pdo->query("SELECT id FROM ttrss_users WHERE id = 1");
 
 				if (!$res->fetch()) {
-					array_push($errors, "SINGLE_USER_MODE is enabled in config.php but default admin account is not found.");
+					array_push($errors, "Config::get(Config::SINGLE_USER_MODE) is enabled in config.php but default admin account is not found.");
 				}
 			}
 
@@ -107,17 +89,17 @@
 					$ref_self_url_path = preg_replace("/\w+\.php$/", "", $ref_self_url_path);
 				}
 
-				if (SELF_URL_PATH == "http://example.org/tt-rss/") {
+				if (Config::get(Config::SELF_URL_PATH) == "http://example.org/tt-rss/") {
 					$hint = $ref_self_url_path ? "(possible value: <b>$ref_self_url_path</b>)" : "";
 					array_push($errors,
-							"Please set SELF_URL_PATH to the correct value for your server: $hint");
+							"Please set Config::get(Config::SELF_URL_PATH) to the correct value for your server: $hint");
 				}
 
 				if ($ref_self_url_path &&
 					(!defined('_SKIP_SELF_URL_PATH_CHECKS') || !_SKIP_SELF_URL_PATH_CHECKS) &&
-					SELF_URL_PATH != $ref_self_url_path && SELF_URL_PATH != mb_substr($ref_self_url_path, 0, mb_strlen($ref_self_url_path)-1)) {
+					Config::get(Config::SELF_URL_PATH) != $ref_self_url_path && Config::get(Config::SELF_URL_PATH) != mb_substr($ref_self_url_path, 0, mb_strlen($ref_self_url_path)-1)) {
 					array_push($errors,
-						"Please set SELF_URL_PATH to the correct value detected for your server: <b>$ref_self_url_path</b> (you're using: <b>" . SELF_URL_PATH . "</b>)");
+						"Please set Config::get(Config::SELF_URL_PATH) to the correct value detected for your server: <b>$ref_self_url_path</b> (you're using: <b>" . Config::get(Config::SELF_URL_PATH) . "</b>)");
 				}
 			}
 
@@ -125,8 +107,8 @@
 				array_push($errors, "ICONS_DIR defined in config.php is not writable (chmod -R 777 ".ICONS_DIR.").\n");
 			}
 
-			if (!is_writable(LOCK_DIRECTORY)) {
-				array_push($errors, "LOCK_DIRECTORY defined in config.php is not writable (chmod -R 777 ".LOCK_DIRECTORY.").\n");
+			if (!is_writable(Config::get(Config::LOCK_DIRECTORY))) {
+				array_push($errors, "Config::get(Config::LOCK_DIRECTORY) defined in config.php is not writable (chmod -R 777 ".Config::get(Config::LOCK_DIRECTORY).").\n");
 			}
 
 			if (!function_exists("curl_init") && !ini_get("allow_url_fopen")) {
@@ -161,7 +143,7 @@
 				array_push($errors, "PHP support for DOMDocument is required, but was not found.");
 			}
 
-			if (DB_TYPE == "mysql") {
+			if (Config::get(Config::DB_TYPE) == "mysql") {
 				$bad_tables = check_mysql_tables();
 
 				if (count($bad_tables) > 0) {
diff --git a/include/sanity_config.php b/include/sanity_config.php
deleted file mode 100644
index b304adf54..000000000
--- a/include/sanity_config.php
+++ /dev/null
@@ -1,3 +0,0 @@
-<?php # This file has been generated at:  Mon Feb 22 14:17:27 MSK 2021
-define('GENERATED_CONFIG_CHECK', 26);
-function get_required_defines() { return [ 'DB_TYPE', 'DB_HOST', 'DB_USER', 'DB_NAME', 'DB_PASS', 'MYSQL_CHARSET', 'SELF_URL_PATH', 'SINGLE_USER_MODE', 'SIMPLE_UPDATE_MODE', 'PHP_EXECUTABLE', 'LOCK_DIRECTORY', 'CACHE_DIR', 'ICONS_DIR', 'ICONS_URL', 'AUTH_AUTO_CREATE', 'AUTH_AUTO_LOGIN', 'FORCE_ARTICLE_PURGE', 'SESSION_COOKIE_LIFETIME', 'SMTP_FROM_NAME', 'SMTP_FROM_ADDRESS', 'DIGEST_SUBJECT', 'CHECK_FOR_UPDATES', 'PLUGINS', 'LOG_DESTINATION', 'CONFIG_VERSION']; }
diff --git a/include/sessions.php b/include/sessions.php
index 5b372612b..d2fbc6a41 100644
--- a/include/sessions.php
+++ b/include/sessions.php
@@ -5,10 +5,11 @@
 
 	require_once "config.php";
 	require_once "autoload.php";
+	require_once "functions.php";
 	require_once "errorhandler.php";
 	require_once "lib/gettext/gettext.inc.php";
 
-	$session_expire = min(2147483647 - time() - 1, max(SESSION_COOKIE_LIFETIME, 86400));
+	$session_expire = min(2147483647 - time() - 1, max(\Config::get(\Config::SESSION_COOKIE_LIFETIME), 86400));
 	$session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
 
 	if (is_server_https()) {
@@ -37,7 +38,7 @@
 	}
 
 	function validate_session() {
-		if (SINGLE_USER_MODE) return true;
+		if (\Config::get(\Config::SINGLE_USER_MODE)) return true;
 
 		if (isset($_SESSION["ref_schema_version"]) && $_SESSION["ref_schema_version"] != session_get_schema_version()) {
 			$_SESSION["login_error_msg"] =
@@ -144,7 +145,7 @@
 		return true;
 	}
 
-	if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
+	if (!\Config::get(\Config::SINGLE_USER_MODE)) {
 		session_set_save_handler('\Sessions\ttrss_open',
 			'\Sessions\ttrss_close', '\Sessions\ttrss_read',
 			'\Sessions\ttrss_write', '\Sessions\ttrss_destroy',
diff --git a/index.php b/index.php
index eec54c55b..8ba401c2d 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,5 @@
 <?php
+
 	if (!file_exists("config.php")) {
 		print "<b>Fatal Error</b>: You forgot to copy
 		<b>config.php-dist</b> to <b>config.php</b> and edit it.\n";
@@ -16,6 +17,7 @@
 		get_include_path());
 
 	require_once "autoload.php";
+
 	require_once "sessions.php";
 	require_once "functions.php";
 	require_once "sanity_check.php";
diff --git a/phpstan.neon b/phpstan.neon
index b2cd978d8..ba425e3d9 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,7 +1,7 @@
 parameters:
    level: 5
    ignoreErrors:
-      - '#Constant.*not found#'
+#      - '#Constant.*not found#'
       - '#Comparison operation ">" between int<1, max> and 0 is always true.#'
       - '#Access to an undefined property DOMNode::\$tagName.#'
       - '#Call to an undefined method DOMNode::(get|remove|set)Attribute.#'
diff --git a/plugins/af_psql_trgm/init.php b/plugins/af_psql_trgm/init.php
index 3b7ed6b14..5611d8998 100644
--- a/plugins/af_psql_trgm/init.php
+++ b/plugins/af_psql_trgm/init.php
@@ -134,7 +134,7 @@ class Af_Psql_Trgm extends Plugin {
 			title="<i class='material-icons'>extension</i> <?= __('Mark similar articles as read (af_psql_trgm)') ?>">
 
 			<?php
-			if (DB_TYPE != "pgsql") {
+			if (Config::get(Config::DB_TYPE) != "pgsql") {
 				print_error("Database type not supported.");
 			} else {
 				$res = $this->pdo->query("select 'similarity'::regproc");
@@ -258,7 +258,7 @@ class Af_Psql_Trgm extends Plugin {
 
 	function hook_article_filter($article) {
 
-		if (DB_TYPE != "pgsql") return $article;
+		if (Config::get(Config::DB_TYPE) != "pgsql") return $article;
 
 		$res = $this->pdo->query("select 'similarity'::regproc");
 		if (!$res || !$res->fetch()) return $article;
diff --git a/plugins/af_redditimgur/init.php b/plugins/af_redditimgur/init.php
index 713eaea5c..9cd046ba4 100755
--- a/plugins/af_redditimgur/init.php
+++ b/plugins/af_redditimgur/init.php
@@ -530,7 +530,7 @@ class Af_RedditImgur extends Plugin {
 						$entry_guid = $article["guid_hashed"];
 						$owner_uid = $article["owner_uid"];
 
-						if (DB_TYPE == "pgsql") {
+						if (Config::get(Config::DB_TYPE) == "pgsql") {
 							$interval_qpart = "date_entered < NOW() - INTERVAL '1 day'";
 						} else {
 							$interval_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 DAY)";
diff --git a/plugins/auth_internal/init.php b/plugins/auth_internal/init.php
index 6a68534ea..13a7bc969 100644
--- a/plugins/auth_internal/init.php
+++ b/plugins/auth_internal/init.php
@@ -244,7 +244,7 @@ class Auth_Internal extends Auth_Base {
 				$tpl->readTemplateFromFile("password_change_template.txt");
 
 				$tpl->setVariable('LOGIN', $row["login"]);
-				$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);
+				$tpl->setVariable('TTRSS_HOST', Config::get(Config::SELF_URL_PATH));
 
 				$tpl->addBlock('message');
 
diff --git a/plugins/bookmarklets/init.php b/plugins/bookmarklets/init.php
index caa8b39df..967918823 100644
--- a/plugins/bookmarklets/init.php
+++ b/plugins/bookmarklets/init.php
@@ -21,7 +21,7 @@ class Bookmarklets extends Plugin {
 	}
 
 	function subscribe() {
-		if (SINGLE_USER_MODE) {
+		if (Config::get(Config::SINGLE_USER_MODE)) {
 			UserHelper::login_sequence();
 		}
 
@@ -172,7 +172,7 @@ class Bookmarklets extends Plugin {
 	}
 
 	function sharepopup() {
-		if (SINGLE_USER_MODE) {
+		if (Config::get(Config::SINGLE_USER_MODE)) {
 			UserHelper::login_sequence();
 		}
 
diff --git a/update.php b/update.php
index ab6272c83..4aff4a774 100755
--- a/update.php
+++ b/update.php
@@ -14,7 +14,7 @@
 	require_once "db-prefs.php";
 
 	function make_stampfile($filename) {
-		$fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
+		$fp = fopen(Config::get(Config::LOCK_DIRECTORY) . "/$filename", "w");
 
 		if (flock($fp, LOCK_EX | LOCK_NB)) {
 			fwrite($fp, time() . "\n");
@@ -30,9 +30,9 @@
 
 		$days = (int) $days;
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$interval_query = "date_updated < NOW() - INTERVAL '$days days'";
-		} else /*if (DB_TYPE == "mysql") */ {
+		} else /*if (Config::get(Config::DB_TYPE) == "mysql") */ {
 			$interval_query = "date_updated < DATE_SUB(NOW(), INTERVAL $days DAY)";
 		}
 
@@ -224,7 +224,7 @@
 			$log = isset($options['log']) ? '--log '.$options['log'] : '';
 			$log_level = isset($options['log-level']) ? '--log-level '.$options['log-level'] : '';
 
-			passthru(PHP_EXECUTABLE . " " . $argv[0] ." --daemon-loop $quiet $log $log_level");
+			passthru(Config::get(Config::PHP_EXECUTABLE) . " " . $argv[0] ." --daemon-loop $quiet $log $log_level");
 
 			// let's enforce a minimum spawn interval as to not forkbomb the host
 			$spawn_interval = max(60, DAEMON_SLEEP_INTERVAL);
@@ -277,7 +277,7 @@
 
 		Debug::log("clearing existing indexes...");
 
-		if (DB_TYPE == "pgsql") {
+		if (Config::get(Config::DB_TYPE) == "pgsql") {
 			$sth = $pdo->query( "SELECT relname FROM
 				pg_catalog.pg_class WHERE relname LIKE 'ttrss_%'
 					AND relname NOT LIKE '%_pkey'
@@ -288,7 +288,7 @@
 		}
 
 		while ($line = $sth->fetch()) {
-			if (DB_TYPE == "pgsql") {
+			if (Config::get(Config::DB_TYPE) == "pgsql") {
 				$statement = "DROP INDEX " . $line["relname"];
 				Debug::log($statement);
 			} else {
@@ -299,9 +299,9 @@
 			$pdo->query($statement);
 		}
 
-		Debug::log("reading indexes from schema for: " . DB_TYPE);
+		Debug::log("reading indexes from schema for: " . Config::get(Config::DB_TYPE));
 
-		$fp = fopen("schema/ttrss_schema_" . DB_TYPE . ".sql", "r");
+		$fp = fopen("schema/ttrss_schema_" . Config::get(Config::DB_TYPE) . ".sql", "r");
 		if ($fp) {
 			while ($line = fgets($fp)) {
 				$matches = array();
@@ -375,14 +375,14 @@
 	}
 
 	if (isset($options["update-schema"])) {
-		Debug::log("Checking for updates (" . DB_TYPE . ")...");
+		Debug::log("Checking for updates (" . Config::get(Config::DB_TYPE) . ")...");
 
-		$updater = new DbUpdater(Db::pdo(), DB_TYPE, SCHEMA_VERSION);
+		$updater = new DbUpdater(Db::pdo(), Config::get(Config::DB_TYPE), SCHEMA_VERSION);
 
 		if ($updater->is_update_required()) {
 			Debug::log("Schema update required, version " . $updater->get_schema_version() . " to " . SCHEMA_VERSION);
 
-			if (DB_TYPE == "mysql")
+			if (Config::get(Config::DB_TYPE) == "mysql")
 				Debug::Log("READ THIS: Due to MySQL limitations, your database is not completely protected while updating.\n".
 					"Errors may put it in an inconsistent state requiring manual rollback.\nBACKUP YOUR DATABASE BEFORE CONTINUING.");
 			else
@@ -460,7 +460,7 @@
 	if (isset($options["list-plugins"])) {
 		$tmppluginhost = new PluginHost();
 		$tmppluginhost->load_all($tmppluginhost::KIND_ALL);
-		$enabled = array_map("trim", explode(",", PLUGINS));
+		$enabled = array_map("trim", explode(",", Config::get(Config::PLUGINS)));
 
 		echo "List of all available plugins:\n";
 
@@ -515,8 +515,8 @@
 
 	PluginHost::getInstance()->run_commands($options);
 
-	if (file_exists(LOCK_DIRECTORY . "/$lock_filename"))
+	if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/$lock_filename"))
 		if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN')
 			fclose($lock_handle);
-		unlink(LOCK_DIRECTORY . "/$lock_filename");
+		unlink(Config::get(Config::LOCK_DIRECTORY) . "/$lock_filename");
 ?>
diff --git a/update_daemon2.php b/update_daemon2.php
index 5d4d3759c..b67fba37d 100755
--- a/update_daemon2.php
+++ b/update_daemon2.php
@@ -98,9 +98,9 @@
 
 	function shutdown($caller_pid) {
 		if ($caller_pid == posix_getpid()) {
-			if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
+			if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon.lock")) {
 				Debug::log("Removing lockfile (master)...");
-				unlink(LOCK_DIRECTORY . "/update_daemon.lock");
+				unlink(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon.lock");
 			}
 		}
 	}
@@ -108,9 +108,9 @@
 	function task_shutdown() {
 		$pid = posix_getpid();
 
-		if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock")) {
+		if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon-$pid.lock")) {
 			Debug::log("Removing task lockfile for PID $pid...");
-			unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock");
+			unlink(Config::get(Config::LOCK_DIRECTORY) . "/update_daemon-$pid.lock");
 		}
 	}
 
@@ -249,7 +249,7 @@
 
 					$my_pid = posix_getpid();
 
-					passthru(PHP_EXECUTABLE . " update.php --daemon-loop $quiet $log --task $j --pidlock $my_pid");
+					passthru(Config::get(Config::PHP_EXECUTABLE) . " update.php --daemon-loop $quiet $log --task $j --pidlock $my_pid");
 
 					sleep(1);
 
diff --git a/utils/regen_config_checks.sh b/utils/regen_config_checks.sh
deleted file mode 100755
index b20ce0480..000000000
--- a/utils/regen_config_checks.sh
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-DESTINATION="include/sanity_config.php"
-
-echo "<?php # This file has been generated at: " `date` > $DESTINATION
-
-echo -n "define('GENERATED_CONFIG_CHECK', " >> $DESTINATION
-grep CONFIG_VERSION config.php-dist | awk -F ' |\)' '{ print $2 }' | xargs echo -n >> $DESTINATION
-echo ");" >> $DESTINATION
-
-echo -n "function get_required_defines() { return [ " >> $DESTINATION
-
-grep define\( config.php-dist | awk -F\' '{ print "*" $2 "*," }' | grep -v DB_PORT | xargs echo -n | sed -e s/,$// -e s/*/\'/g >> $DESTINATION
-
-echo "]; }" >> $DESTINATION
-
-
-- 
cgit v1.2.3-54-g00ecf

From 211f699aa0c4211e4ee8a02446d51b9811d0c28c Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Mon, 22 Feb 2021 22:35:27 +0300
Subject: migrate the rest into Config::

(limited to 'include/login_form.php')

diff --git a/classes/config.php b/classes/config.php
index 8a7470135..349706390 100644
--- a/classes/config.php
+++ b/classes/config.php
@@ -1,98 +1,134 @@
 <?php
 class Config {
+	private const _ENVVAR_PREFIX = "TTRSS_";
 
-   const DB_TYPE = "DB_TYPE";
-   const DB_HOST = "DB_HOST";
-   const DB_USER = "DB_USER";
-   const DB_NAME = "DB_NAME";
-   const DB_PASS = "DB_PASS";
-   const DB_PORT = "DB_PORT";
-   const MYSQL_CHARSET = "MYSQL_CHARSET";
-   const SELF_URL_PATH = "SELF_URL_PATH";
-   const SINGLE_USER_MODE = "SINGLE_USER_MODE";
-   const SIMPLE_UPDATE_MODE = "SIMPLE_UPDATE_MODE";
-   const PHP_EXECUTABLE = "PHP_EXECUTABLE";
-   const LOCK_DIRECTORY = "LOCK_DIRECTORY";
-   const CACHE_DIR = "CACHE_DIR";
-   const ICONS_DIR = "ICONS_DIR";
-   const ICONS_URL = "ICONS_URL";
-   const AUTH_AUTO_CREATE = "AUTH_AUTO_CREATE";
-   const AUTH_AUTO_LOGIN = "AUTH_AUTO_LOGIN";
-   const FORCE_ARTICLE_PURGE = "FORCE_ARTICLE_PURGE";
-   const ENABLE_REGISTRATION = "ENABLE_REGISTRATION";
-   const SESSION_COOKIE_LIFETIME = "SESSION_COOKIE_LIFETIME";
-   const SMTP_FROM_NAME = "SMTP_FROM_NAME";
-   const SMTP_FROM_ADDRESS = "SMTP_FROM_ADDRESS";
-   const DIGEST_SUBJECT = "DIGEST_SUBJECT";
-   const CHECK_FOR_UPDATES = "CHECK_FOR_UPDATES";
-   const PLUGINS = "PLUGINS";
-   const LOG_DESTINATION = "LOG_DESTINATION";
+	/* overriding defaults (defined below in _DEFAULTS[]) via environment: DB_TYPE becomes TTRSS_DB_TYPE, etc */
 
-   private const _DEFAULTS = [
-      Config::DB_TYPE => "pgsql",
-      Config::DB_HOST => "db",
-      Config::DB_USER => "",
-      Config::DB_NAME => "",
-      Config::DB_PASS => "",
-      Config::DB_PORT => "5432",
-      Config::MYSQL_CHARSET => "UTF8",
-      Config::SELF_URL_PATH => "",
-      Config::SINGLE_USER_MODE => "",
-      Config::SIMPLE_UPDATE_MODE => "",
-      Config::PHP_EXECUTABLE => "/usr/bin/php",
-      Config::LOCK_DIRECTORY => "lock",
-      Config::CACHE_DIR => "cache",
-      Config::ICONS_DIR => "feed-icons",
-      Config::ICONS_URL => "feed-icons",
-      Config::AUTH_AUTO_CREATE => "true",
-      Config::AUTH_AUTO_LOGIN => "true",
-      Config::FORCE_ARTICLE_PURGE => 0,
-      Config::ENABLE_REGISTRATION => "",
-      Config::SESSION_COOKIE_LIFETIME => 86400,
-      Config::SMTP_FROM_NAME => "Tiny Tiny RSS",
-      Config::SMTP_FROM_ADDRESS => "noreply@localhost",
-      Config::DIGEST_SUBJECT => "[tt-rss] New headlines for last 24 hours",
-      Config::CHECK_FOR_UPDATES => "true",
-      Config::PLUGINS => "auth_internal",
-      Config::LOG_DESTINATION => "sql",
-   ];
+	const DB_TYPE = "DB_TYPE";
+	const DB_HOST = "DB_HOST";
+	const DB_USER = "DB_USER";
+	const DB_NAME = "DB_NAME";
+	const DB_PASS = "DB_PASS";
+	const DB_PORT = "DB_PORT";
+	const MYSQL_CHARSET = "MYSQL_CHARSET";
+	const SELF_URL_PATH = "SELF_URL_PATH";
+	const SINGLE_USER_MODE = "SINGLE_USER_MODE";
+	const SIMPLE_UPDATE_MODE = "SIMPLE_UPDATE_MODE";
+	const PHP_EXECUTABLE = "PHP_EXECUTABLE";
+	const LOCK_DIRECTORY = "LOCK_DIRECTORY";
+	const CACHE_DIR = "CACHE_DIR";
+	const ICONS_DIR = "ICONS_DIR";
+	const ICONS_URL = "ICONS_URL";
+	const AUTH_AUTO_CREATE = "AUTH_AUTO_CREATE";
+	const AUTH_AUTO_LOGIN = "AUTH_AUTO_LOGIN";
+	const FORCE_ARTICLE_PURGE = "FORCE_ARTICLE_PURGE";
+	const ENABLE_REGISTRATION = "ENABLE_REGISTRATION";
+	const SESSION_COOKIE_LIFETIME = "SESSION_COOKIE_LIFETIME";
+	const SMTP_FROM_NAME = "SMTP_FROM_NAME";
+	const SMTP_FROM_ADDRESS = "SMTP_FROM_ADDRESS";
+	const DIGEST_SUBJECT = "DIGEST_SUBJECT";
+	const CHECK_FOR_UPDATES = "CHECK_FOR_UPDATES";
+	const PLUGINS = "PLUGINS";
+	const LOG_DESTINATION = "LOG_DESTINATION";
+	const LOCAL_OVERRIDE_STYLESHEET = "LOCAL_OVERRIDE_STYLESHEET";
+	const DAEMON_MAX_CHILD_RUNTIME = "DAEMON_MAX_CHILD_RUNTIME";
+	const DAEMON_MAX_JOBS = "DAEMON_MAX_JOBS";
+	const FEED_FETCH_TIMEOUT = "FEED_FETCH_TIMEOUT";
+	const FEED_FETCH_NO_CACHE_TIMEOUT = "FEED_FETCH_NO_CACHE_TIMEOUT";
+	const FILE_FETCH_TIMEOUT = "FILE_FETCH_TIMEOUT";
+	const FILE_FETCH_CONNECT_TIMEOUT = "FILE_FETCH_CONNECT_TIMEOUT";
+	const DAEMON_UPDATE_LOGIN_LIMIT = "DAEMON_UPDATE_LOGIN_LIMIT";
+	const DAEMON_FEED_LIMIT = "DAEMON_FEED_LIMIT";
+	const DAEMON_SLEEP_INTERVAL = "DAEMON_SLEEP_INTERVAL";
+	const MAX_CACHE_FILE_SIZE = "MAX_CACHE_FILE_SIZE";
+	const MAX_DOWNLOAD_FILE_SIZE = "MAX_DOWNLOAD_FILE_SIZE";
+	const MAX_FAVICON_FILE_SIZE = "MAX_FAVICON_FILE_SIZE";
+	const CACHE_MAX_DAYS = "CACHE_MAX_DAYS";
+	const MAX_CONDITIONAL_INTERVAL = "MAX_CONDITIONAL_INTERVAL";
+	const DAEMON_UNSUCCESSFUL_DAYS_LIMIT = "DAEMON_UNSUCCESSFUL_DAYS_LIMIT";
+	const LOG_SENT_MAIL = "LOG_SENT_MAIL";
 
-   private const _ENVVAR_PREFIX = "TTRSS_";
-   private static $instance;
+	private const _DEFAULTS = [
+		Config::DB_TYPE => "pgsql",
+		Config::DB_HOST => "db",
+		Config::DB_USER => "",
+		Config::DB_NAME => "",
+		Config::DB_PASS => "",
+		Config::DB_PORT => "5432",
+		Config::MYSQL_CHARSET => "UTF8",
+		Config::SELF_URL_PATH => "",
+		Config::SINGLE_USER_MODE => "",
+		Config::SIMPLE_UPDATE_MODE => "",
+		Config::PHP_EXECUTABLE => "/usr/bin/php",
+		Config::LOCK_DIRECTORY => "lock",
+		Config::CACHE_DIR => "cache",
+		Config::ICONS_DIR => "feed-icons",
+		Config::ICONS_URL => "feed-icons",
+		Config::AUTH_AUTO_CREATE => "true",
+		Config::AUTH_AUTO_LOGIN => "true",
+		Config::FORCE_ARTICLE_PURGE => 0,
+		Config::ENABLE_REGISTRATION => "",
+		Config::SESSION_COOKIE_LIFETIME => 86400,
+		Config::SMTP_FROM_NAME => "Tiny Tiny RSS",
+		Config::SMTP_FROM_ADDRESS => "noreply@localhost",
+		Config::DIGEST_SUBJECT => "[tt-rss] New headlines for last 24 hours",
+		Config::CHECK_FOR_UPDATES => "true",
+		Config::PLUGINS => "auth_internal",
+		Config::LOG_DESTINATION => "sql",
+		Config::LOCAL_OVERRIDE_STYLESHEET => "local-overrides.css",
+		Config::DAEMON_MAX_CHILD_RUNTIME => 1800,
+		Config::DAEMON_MAX_JOBS => 2,
+		Config::FEED_FETCH_TIMEOUT => 45,
+		Config::FEED_FETCH_NO_CACHE_TIMEOUT => 15,
+		Config::FILE_FETCH_TIMEOUT => 45,
+		Config::FILE_FETCH_CONNECT_TIMEOUT => 15,
+		Config::DAEMON_UPDATE_LOGIN_LIMIT => 30,
+		Config::DAEMON_FEED_LIMIT => 500,
+		Config::DAEMON_SLEEP_INTERVAL => 120,
+		Config::MAX_CACHE_FILE_SIZE => 64*1024*1024,
+		Config::MAX_DOWNLOAD_FILE_SIZE => 16*1024*1024,
+		Config::MAX_FAVICON_FILE_SIZE => 1*1024*1024,
+		Config::CACHE_MAX_DAYS => 7,
+		Config::MAX_CONDITIONAL_INTERVAL => 3600*12,
+		Config::DAEMON_UNSUCCESSFUL_DAYS_LIMIT => 30,
+		Config::LOG_SENT_MAIL => "",
+	];
 
-   private $params = [];
+	private static $instance;
 
-   public static function get_instance() {
+	private $params = [];
+
+	public static function get_instance() {
 		if (self::$instance == null)
 			self::$instance = new self();
 
 		return self::$instance;
 	}
 
-   function __construct() {
-      $ref = new ReflectionClass(get_class($this));
+	function __construct() {
+		$ref = new ReflectionClass(get_class($this));
 
-      foreach ($ref->getConstants() as $const => $cvalue) {
-         if (strpos($const, "_") !== 0) {
-            $override = getenv($this::_ENVVAR_PREFIX . $const);
+		foreach ($ref->getConstants() as $const => $cvalue) {
+			if (strpos($const, "_") !== 0) {
+				$override = getenv($this::_ENVVAR_PREFIX . $const);
 
-            if (!empty($override)) {
-               $this->params[$cvalue] = $override;
-            } else {
-               $this->params[$cvalue] = $this::_DEFAULTS[$const];
-            }
-         }
-      }
-   }
+				if (!empty($override)) {
+					$this->params[$cvalue] = $override;
+				} else {
+					$this->params[$cvalue] = $this::_DEFAULTS[$const];
+				}
+			}
+		}
+	}
 
-   private function _get($param) {
-      return $this->params[$param];
-   }
+	private function _get($param) {
+		return $this->params[$param];
+	}
 
-   static function get($param) {
-      $instance = self::get_instance();
+	static function get($param) {
+		$instance = self::get_instance();
 
-      return $instance->_get($param);
-   }
+		return $instance->_get($param);
+	}
 
 }
\ No newline at end of file
diff --git a/classes/db.php b/classes/db.php
index 1ccaa3533..5196e7c7d 100755
--- a/classes/db.php
+++ b/classes/db.php
@@ -41,8 +41,8 @@ class Db
 		} else if (Config::get(Config::DB_TYPE) == "mysql") {
 			$pdo->query("SET time_zone = '+0:0'");
 
-			if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
-				$pdo->query("SET NAMES " . MYSQL_CHARSET);
+			if (defined('Config::get(Config::MYSQL_CHARSET)') && Config::get(Config::MYSQL_CHARSET)) {
+				$pdo->query("SET NAMES " . Config::get(Config::MYSQL_CHARSET));
 			}
 		}
 
diff --git a/classes/digest.php b/classes/digest.php
index 9ac3f6a17..a6a0c47de 100644
--- a/classes/digest.php
+++ b/classes/digest.php
@@ -48,11 +48,11 @@ class Digest
 
 						$mailer = new Mailer();
 
-						//$rc = $mail->quickMail($line["email"], $line["login"], DIGEST_SUBJECT, $digest, $digest_text);
+						//$rc = $mail->quickMail($line["email"], $line["login"], Config::get(Config::DIGEST_SUBJECT), $digest, $digest_text);
 
 						$rc = $mailer->mail(["to_name" => $line["login"],
 							"to_address" => $line["email"],
-							"subject" => DIGEST_SUBJECT,
+							"subject" => Config::get(Config::DIGEST_SUBJECT),
 							"message" => $digest_text,
 							"message_html" => $digest]);
 
@@ -91,11 +91,11 @@ class Digest
 
 		$tpl->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
+		$tpl->setVariable('TTRSS_HOST', Config::get(Config::get(Config::SELF_URL_PATH)));
 
 		$tpl_t->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl_t->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl_t->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
+		$tpl_t->setVariable('TTRSS_HOST', Config::get(Config::get(Config::SELF_URL_PATH)));
 
 		$affected_ids = array();
 
diff --git a/classes/diskcache.php b/classes/diskcache.php
index 063a3847c..9c594acc5 100644
--- a/classes/diskcache.php
+++ b/classes/diskcache.php
@@ -349,7 +349,7 @@ class DiskCache {
 
 				if ($files) {
 					foreach ($files as $file) {
-						if (time() - filemtime($file) > 86400*CACHE_MAX_DAYS) {
+						if (time() - filemtime($file) > 86400*Config::get(Config::CACHE_MAX_DAYS)) {
 							unlink($file);
 
 							++$num_deleted;
diff --git a/classes/feeds.php b/classes/feeds.php
index 274cb22d0..eaedc1aee 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -1056,11 +1056,11 @@ class Feeds extends Handler_Protected {
 	}
 
 	static function _get_icon_file($feed_id) {
-		return ICONS_DIR . "/$feed_id.ico";
+		return Config::get(Config::ICONS_DIR) . "/$feed_id.ico";
 	}
 
 	static function _has_icon($id) {
-		return is_file(ICONS_DIR . "/$id.ico") && filesize(ICONS_DIR . "/$id.ico") > 0;
+		return is_file(Config::get(Config::ICONS_DIR) . "/$id.ico") && filesize(Config::get(Config::ICONS_DIR) . "/$id.ico") > 0;
 	}
 
 	static function _get_icon($id) {
@@ -1084,7 +1084,7 @@ class Feeds extends Handler_Protected {
 					$icon = self::_get_icon_file($id);
 
                     if ($icon && file_exists($icon)) {
-						return ICONS_URL . "/" . basename($icon) . "?" . filemtime($icon);
+						return Config::get(Config::ICONS_URL) . "/" . basename($icon) . "?" . filemtime($icon);
 					}
 				}
 				break;
diff --git a/classes/logger.php b/classes/logger.php
index cdc6b240a..6cc33314d 100755
--- a/classes/logger.php
+++ b/classes/logger.php
@@ -42,7 +42,7 @@ class Logger {
 	}
 
 	function __construct() {
-		switch (LOG_DESTINATION) {
+		switch (Config::get(Config::LOG_DESTINATION)) {
 		case "sql":
 			$this->adapter = new Logger_SQL();
 			break;
diff --git a/classes/mailer.php b/classes/mailer.php
index 16be16523..93f778210 100644
--- a/classes/mailer.php
+++ b/classes/mailer.php
@@ -11,15 +11,15 @@ class Mailer {
 		$subject = $params["subject"];
 		$message = $params["message"];
 		$message_html = $params["message_html"];
-		$from_name = $params["from_name"] ? $params["from_name"] : SMTP_FROM_NAME;
-		$from_address = $params["from_address"] ? $params["from_address"] : SMTP_FROM_ADDRESS;
+		$from_name = $params["from_name"] ? $params["from_name"] : Config::get(Config::SMTP_FROM_NAME);
+		$from_address = $params["from_address"] ? $params["from_address"] : Config::get(Config::SMTP_FROM_ADDRESS);
 
 		$additional_headers = $params["headers"] ? $params["headers"] : [];
 
 		$from_combined = $from_name ? "$from_name <$from_address>" : $from_address;
 		$to_combined = $to_name ? "$to_name <$to_address>" : $to_address;
 
-		if (defined('_LOG_SENT_MAIL') && _LOG_SENT_MAIL)
+		if (Config::get(Config::LOG_SENT_MAIL))
 			Logger::get()->log(E_USER_NOTICE, "Sending mail from $from_combined to $to_combined [$subject]: $message");
 
 		// HOOK_SEND_MAIL plugin instructions:
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index 229effeb3..7c3a40647 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -441,7 +441,7 @@ class Pref_Feeds extends Handler_Protected {
 		$sth->execute([$feed_id, $_SESSION['uid']]);
 
 		if ($row = $sth->fetch()) {
-			@unlink(ICONS_DIR . "/$feed_id.ico");
+			@unlink(Config::get(Config::ICONS_DIR) . "/$feed_id.ico");
 
 			$sth = $this->pdo->prepare("UPDATE ttrss_feeds SET favicon_avg_color = NULL, favicon_last_checked = '1970-01-01'
 				where id = ?");
@@ -479,7 +479,7 @@ class Pref_Feeds extends Handler_Protected {
 				$sth->execute([$feed_id, $_SESSION['uid']]);
 
 				if ($row = $sth->fetch()) {
-					$new_filename = ICONS_DIR . "/$feed_id.ico";
+					$new_filename = Config::get(Config::ICONS_DIR) . "/$feed_id.ico";
 
 					if (file_exists($new_filename)) unlink($new_filename);
 
@@ -1228,8 +1228,8 @@ class Pref_Feeds extends Handler_Protected {
 
 			$pdo->commit();
 
-			if (file_exists(ICONS_DIR . "/$id.ico")) {
-				unlink(ICONS_DIR . "/$id.ico");
+			if (file_exists(Config::get(Config::ICONS_DIR) . "/$id.ico")) {
+				unlink(Config::get(Config::ICONS_DIR) . "/$id.ico");
 			}
 
 		} else {
diff --git a/classes/pref/system.php b/classes/pref/system.php
index bc519a321..35c776463 100644
--- a/classes/pref/system.php
+++ b/classes/pref/system.php
@@ -153,10 +153,10 @@ class Pref_System extends Handler_Administrative {
 		<div dojoType='dijit.layout.AccordionContainer' region='center'>
 			<div dojoType='dijit.layout.AccordionPane' style='padding : 0' title='<i class="material-icons">report</i> <?= __('Event Log') ?>'>
 				<?php
-					if (LOG_DESTINATION == "sql") {
+					if (Config::get(Config::LOG_DESTINATION) == "sql") {
 						$this->_log_viewer($page, $severity);
 					} else {
-						print_notice("Please set LOG_DESTINATION to 'sql' in config.php to enable database logging.");
+						print_notice("Please set Config::get(Config::LOG_DESTINATION) to 'sql' in config.php to enable database logging.");
 					}
 				?>
 			</div>
diff --git a/classes/pref/users.php b/classes/pref/users.php
index 5ac6a7990..f30abe001 100644
--- a/classes/pref/users.php
+++ b/classes/pref/users.php
@@ -86,7 +86,7 @@ class Pref_Users extends Handler_Administrative {
 					<?php while ($row = $sth->fetch()) { ?>
 						<li>
 							<?php
-								$icon_file = ICONS_URL . "/" . $row["id"] . ".ico";
+								$icon_file = Config::get(Config::ICONS_URL) . "/" . $row["id"] . ".ico";
 								$icon = file_exists($icon_file) ? $icon_file : "images/blank_icon.gif";
 							?>
 
diff --git a/classes/rpc.php b/classes/rpc.php
index bf24132b0..4aa3f69d5 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -165,8 +165,9 @@ class RPC extends Handler_Protected {
 	function setpanelmode() {
 		$wide = (int) clean($_REQUEST["wide"]);
 
+		// FIXME should this use SESSION_COOKIE_LIFETIME and be renewed periodically?
 		setcookie("ttrss_widescreen", (string)$wide,
-			time() + COOKIE_LIFETIME_LONG);
+			time() + 86400*365);
 
 		print json_encode(array("wide" => $wide));
 	}
@@ -328,7 +329,7 @@ class RPC extends Handler_Protected {
 
 		get_version($git_commit, $git_timestamp);
 
-		if (defined('CHECK_FOR_UPDATES') && CHECK_FOR_UPDATES && $_SESSION["access_level"] >= 10 && $git_timestamp) {
+		if (defined('Config::get(Config::CHECK_FOR_UPDATES)') && Config::get(Config::CHECK_FOR_UPDATES) && $_SESSION["access_level"] >= 10 && $git_timestamp) {
 			$content = @UrlHelper::fetch(["url" => "https://tt-rss.org/version.json"]);
 
 			if ($content) {
@@ -359,8 +360,8 @@ class RPC extends Handler_Protected {
 		}
 
 		$params["safe_mode"] = !empty($_SESSION["safe_mode"]);
-		$params["check_for_updates"] = CHECK_FOR_UPDATES;
-		$params["icons_url"] = ICONS_URL;
+		$params["check_for_updates"] = Config::get(Config::CHECK_FOR_UPDATES);
+		$params["icons_url"] = Config::get(Config::ICONS_URL);
 		$params["cookie_lifetime"] = Config::get(Config::SESSION_COOKIE_LIFETIME);
 		$params["default_view_mode"] = get_pref("_DEFAULT_VIEW_MODE");
 		$params["default_view_limit"] = (int) get_pref("_DEFAULT_VIEW_LIMIT");
@@ -390,15 +391,10 @@ class RPC extends Handler_Protected {
 		$params["self_url_prefix"] = get_self_url_prefix();
 		$params["max_feed_id"] = (int) $max_feed_id;
 		$params["num_feeds"] = (int) $num_feeds;
-
 		$params["hotkeys"] = $this->get_hotkeys_map();
-
 		$params["widescreen"] = (int) ($_COOKIE["ttrss_widescreen"] ?? 0);
-
-		$params['simple_update'] = SIMPLE_UPDATE_MODE;
-
+		$params['simple_update'] = Config::get(Config::SIMPLE_UPDATE_MODE);
 		$params["icon_indicator_white"] = $this->image_to_base64("images/indicator_white.gif");
-
 		$params["labels"] = Labels::get_all($_SESSION["uid"]);
 
 		return $params;
@@ -432,7 +428,7 @@ class RPC extends Handler_Protected {
 		$data['cdm_expanded'] = get_pref('CDM_EXPANDED');
 		$data["labels"] = Labels::get_all($_SESSION["uid"]);
 
-		if (LOG_DESTINATION == 'sql' && $_SESSION['access_level'] >= 10) {
+		if (Config::get(Config::LOG_DESTINATION) == 'sql' && $_SESSION['access_level'] >= 10) {
 			if (Config::get(Config::DB_TYPE) == 'pgsql') {
 				$log_interval = "created_at > NOW() - interval '1 hour'";
 			} else {
diff --git a/classes/rssutils.php b/classes/rssutils.php
index c951003f0..5dcbb48d6 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -34,9 +34,9 @@ class RSSUtils {
 		$pdo = Db::pdo();
 		$sth = $pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ?");
 
-		// check icon files once every CACHE_MAX_DAYS days
-		$icon_files = array_filter(glob(ICONS_DIR . "/*.ico"),
-			function($f) { return filemtime($f) < time() - 86400*CACHE_MAX_DAYS; });
+		// check icon files once every Config::get(Config::CACHE_MAX_DAYS) days
+		$icon_files = array_filter(glob(Config::get(Config::ICONS_DIR) . "/*.ico"),
+			function($f) { return filemtime($f) < time() - 86400 * Config::get(Config::CACHE_MAX_DAYS); });
 
 		foreach ($icon_files as $icon) {
 			$feed_id = basename($icon, ".ico");
@@ -52,20 +52,22 @@ class RSSUtils {
 		}
 	}
 
-	static function update_daemon_common($limit = DAEMON_FEED_LIMIT, $options = []) {
+	static function update_daemon_common($limit = null, $options = []) {
 		$schema_version = get_schema_version();
 
+		if (!$limit) $limit = Config::get(Config::DAEMON_FEED_LIMIT);
+
 		if ($schema_version != SCHEMA_VERSION) {
 			die("Schema version is wrong, please upgrade the database.\n");
 		}
 
 		$pdo = Db::pdo();
 
-		if (!Config::get(Config::SINGLE_USER_MODE) && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+		if (!Config::get(Config::SINGLE_USER_MODE) && Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT) > 0) {
 			if (Config::get(Config::DB_TYPE) == "pgsql") {
-				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
+				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT)." days'";
 			} else {
-				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
+				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT)." DAY)";
 			}
 		} else {
 			$login_thresh_qpart = "";
@@ -288,7 +290,7 @@ class RSSUtils {
 			if (!$basic_info) {
 				$feed_data = UrlHelper::fetch($fetch_url, false,
 					$auth_login, $auth_pass, false,
-					FEED_FETCH_TIMEOUT,
+					Config::get(Config::FEED_FETCH_TIMEOUT),
 					0);
 
 				$feed_data = trim($feed_data);
@@ -455,7 +457,7 @@ class RSSUtils {
 				Debug::log("not using CURL due to open_basedir restrictions", Debug::$LOG_VERBOSE);
 			}
 
-			if (time() - strtotime($last_unconditional) > MAX_CONDITIONAL_INTERVAL) {
+			if (time() - strtotime($last_unconditional) > Config::get(Config::MAX_CONDITIONAL_INTERVAL)) {
 				Debug::log("maximum allowed interval for conditional requests exceeded, forcing refetch", Debug::$LOG_VERBOSE);
 
 				$force_refetch = true;
@@ -469,7 +471,7 @@ class RSSUtils {
 				"url" => $fetch_url,
 				"login" => $auth_login,
 				"pass" => $auth_pass,
-				"timeout" => $no_cache ? FEED_FETCH_NO_CACHE_TIMEOUT : FEED_FETCH_TIMEOUT,
+				"timeout" => $no_cache ? Config::get(Config::FEED_FETCH_NO_CACHE_TIMEOUT) : Config::get(Config::FEED_FETCH_TIMEOUT),
 				"last_modified" => $force_refetch ? "" : $stored_last_modified
 			]);
 
@@ -591,7 +593,7 @@ class RSSUtils {
 				/* terrible hack: if we crash on floicon shit here, we won't check
 				 * the icon avgcolor again (unless the icon got updated) */
 
-				$favicon_file = ICONS_DIR . "/$feed.ico";
+				$favicon_file = Config::get(Config::ICONS_DIR) . "/$feed.ico";
 				$favicon_modified = file_exists($favicon_file) ? filemtime($favicon_file) : -1;
 
 				Debug::log("checking favicon for feed $feed...", Debug::$LOG_VERBOSE);
@@ -755,7 +757,7 @@ class RSSUtils {
 							$e->type, $e->length, $e->title, $e->width, $e->height);
 
 						// Yet another episode of "mysql utf8_general_ci is gimped"
-						if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+						if (Config::get(Config::DB_TYPE) == "mysql" && Config::get(Config::MYSQL_CHARSET) != "UTF8MB4") {
 							for ($i = 0; $i < count($e_item); $i++) {
 								if (is_string($e_item[$i])) {
 									$e_item[$i] = self::strip_utf8mb4($e_item[$i]);
@@ -833,7 +835,7 @@ class RSSUtils {
 				Debug::log("plugin data: $entry_plugin_data", Debug::$LOG_VERBOSE);
 
 				// Workaround: 4-byte unicode requires utf8mb4 in MySQL. See https://tt-rss.org/forum/viewtopic.php?f=1&t=3377&p=20077#p20077
-				if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+				if (Config::get(Config::DB_TYPE) == "mysql" && Config::get(Config::MYSQL_CHARSET) != "UTF8MB4") {
 					foreach ($article as $k => $v) {
 						// i guess we'll have to take the risk of 4byte unicode labels & tags here
 						if (is_string($article[$k])) {
@@ -1298,7 +1300,7 @@ class RSSUtils {
 
 						$file_content = UrlHelper::fetch(array("url" => $src,
 							"http_referrer" => $src,
-							"max_size" => MAX_CACHE_FILE_SIZE));
+							"max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)));
 
 						if ($file_content) {
 							$cache->put($local_filename, $file_content);
@@ -1328,7 +1330,7 @@ class RSSUtils {
 
 			$file_content = UrlHelper::fetch(array("url" => $url,
 				"http_referrer" => $url,
-				"max_size" => MAX_CACHE_FILE_SIZE));
+				"max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)));
 
 			if ($file_content) {
 				$cache->put($local_filename, $file_content);
@@ -1643,7 +1645,7 @@ class RSSUtils {
 	}
 
 	static function check_feed_favicon($site_url, $feed) {
-		$icon_file = ICONS_DIR . "/$feed.ico";
+		$icon_file = Config::get(Config::ICONS_DIR) . "/$feed.ico";
 
 		$favicon_url = self::get_favicon_url($site_url);
 		if (!$favicon_url) {
@@ -1654,7 +1656,7 @@ class RSSUtils {
 		// Limiting to "image" type misses those served with text/plain
 		$contents = UrlHelper::fetch([
 			'url' => $favicon_url,
-			'max_size' => MAX_FAVICON_FILE_SIZE,
+			'max_size' => Config::get(Config::MAX_FAVICON_FILE_SIZE),
 			//'type' => 'image',
 		]);
 		if (!$contents) {
diff --git a/classes/urlhelper.php b/classes/urlhelper.php
index 8717d02c3..42aa069e6 100644
--- a/classes/urlhelper.php
+++ b/classes/urlhelper.php
@@ -209,7 +209,7 @@ class UrlHelper {
 		$last_modified = isset($options["last_modified"]) ? $options["last_modified"] : "";
 		$useragent = isset($options["useragent"]) ? $options["useragent"] : false;
 		$followlocation = isset($options["followlocation"]) ? $options["followlocation"] : true;
-		$max_size = isset($options["max_size"]) ? $options["max_size"] : MAX_DOWNLOAD_FILE_SIZE; // in bytes
+		$max_size = isset($options["max_size"]) ? $options["max_size"] : Config::get(Config::MAX_DOWNLOAD_FILE_SIZE); // in bytes
 		$http_accept = isset($options["http_accept"]) ? $options["http_accept"] : false;
 		$http_referrer = isset($options["http_referrer"]) ? $options["http_referrer"] : false;
 
@@ -250,8 +250,8 @@ class UrlHelper {
 			if (count($curl_http_headers) > 0)
 				curl_setopt($ch, CURLOPT_HTTPHEADER, $curl_http_headers);
 
-			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
-			curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : FILE_FETCH_TIMEOUT);
+			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
+			curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT));
 			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir") && $followlocation);
 			curl_setopt($ch, CURLOPT_MAXREDIRS, 20);
 			curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
@@ -395,7 +395,7 @@ class UrlHelper {
 						),
 						'method' => 'GET',
 						'ignore_errors' => true,
-						'timeout' => $timeout ? $timeout : FILE_FETCH_TIMEOUT,
+						'timeout' => $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT),
 						'protocol_version'=> 1.1)
 				  );
 
@@ -417,7 +417,7 @@ class UrlHelper {
 
 			$old_error = error_get_last();
 
-			$fetch_effective_url = self::resolve_redirects($url, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
+			$fetch_effective_url = self::resolve_redirects($url, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
 
 			if (!self::validate($fetch_effective_url, true)) {
 				$fetch_last_error = "URL received after redirection failed extended validation.";
diff --git a/config.php-dist b/config.php-dist
index 2ee1c719d..840880ad9 100644
--- a/config.php-dist
+++ b/config.php-dist
@@ -131,7 +131,7 @@
 	// Disabling auth_internal in this list would automatically disable
 	// reset password link on the login form.
 
-	define('LOG_DESTINATION', 'sql');
+	define('Config::get(Config::LOG_DESTINATION)', 'sql');
 	// Error log destination to use. Possible values: sql (uses internal logging
 	// you can read in Preferences -> System), syslog - logs to system log.
 	// Setting this to blank uses PHP logging (usually to http server
diff --git a/include/functions.php b/include/functions.php
index 526c6058a..59c824e43 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -5,12 +5,6 @@
 	define('LABEL_BASE_INDEX', -1024);
 	define('PLUGIN_FEED_BASE_INDEX', -128);
 
-	define('COOKIE_LIFETIME_LONG', 86400*365);
-
-	// this CSS file is included for everyone (if it exists in themes.local)
-	// on login, registration, and main (index and prefs) pages
-	define('LOCAL_OVERRIDE_STYLESHEET', '.local-overrides.css');
-
 	$fetch_last_error = false;
 	$fetch_last_error_code = false;
 	$fetch_last_content_type = false;
@@ -37,49 +31,7 @@
 	ini_set('display_errors', "false");
 	ini_set('display_startup_errors', "false");
 
-	require_once 'config.php';
-
-	/* Some tunables you can override in config.php using define():	*/
-
-	if (!defined('FEED_FETCH_TIMEOUT')) 					define('FEED_FETCH_TIMEOUT', 45);
-	// How may seconds to wait for response when requesting feed from a site
-	if (!defined('FEED_FETCH_NO_CACHE_TIMEOUT')) 		define('FEED_FETCH_NO_CACHE_TIMEOUT', 15);
-	// How may seconds to wait for response when requesting feed from a
-	// site when that feed wasn't cached before
-	if (!defined('FILE_FETCH_TIMEOUT')) 					define('FILE_FETCH_TIMEOUT', 45);
-	// Default timeout when fetching files from remote sites
-	if (!defined('FILE_FETCH_CONNECT_TIMEOUT')) 			define('FILE_FETCH_CONNECT_TIMEOUT', 15);
-	// How many seconds to wait for initial response from website when
-	// fetching files from remote sites
-	if (!defined('DAEMON_UPDATE_LOGIN_LIMIT'))			define('DAEMON_UPDATE_LOGIN_LIMIT', 30);
-	// stop updating feeds if users haven't logged in for X days
-	if (!defined('DAEMON_FEED_LIMIT'))						define('DAEMON_FEED_LIMIT', 500);
-	// feed limit for one update batch
-	if (!defined('DAEMON_SLEEP_INTERVAL'))					define('DAEMON_SLEEP_INTERVAL', 120);
-	// default sleep interval between feed updates (sec)
-	if (!defined('MAX_CACHE_FILE_SIZE'))					define('MAX_CACHE_FILE_SIZE', 64*1024*1024);
-	// do not cache files larger than that (bytes)
-	if (!defined('MAX_DOWNLOAD_FILE_SIZE'))				define('MAX_DOWNLOAD_FILE_SIZE', 16*1024*1024);
-	// do not download general files larger than that (bytes)
-	if (!defined('MAX_FAVICON_FILE_SIZE'))					define('MAX_FAVICON_FILE_SIZE', 1*1024*1024);
-	// do not download favicon files larger than that (bytes)
-	if (!defined('CACHE_MAX_DAYS'))							define('CACHE_MAX_DAYS', 7);
-	// max age in days for various automatically cached (temporary) files
-	if (!defined('MAX_CONDITIONAL_INTERVAL'))				define('MAX_CONDITIONAL_INTERVAL', 3600*12);
-	// max interval between forced unconditional updates for servers
-	// not complying with http if-modified-since (seconds)
-	// if (!defined('MAX_FETCH_REQUESTS_PER_HOST')) define('MAX_FETCH_REQUESTS_PER_HOST', 25);
-	// a maximum amount of allowed HTTP requests per destination host
-	// during a single update (i.e. within PHP process lifetime)
-	// this is used to not cause excessive load on the origin server on
-	// e.g. feed subscription when all articles are being processes
-	// (not implemented)
-	if (!defined('DAEMON_UNSUCCESSFUL_DAYS_LIMIT'))		define('DAEMON_UNSUCCESSFUL_DAYS_LIMIT', 30);
-	// automatically disable updates for feeds which failed to
-	// update for this amount of days; 0 disables
-
-	/* tunables end here */
-
+	require_once "config.php";
 	require_once "autoload.php";
 
 	if (Config::get(Config::DB_TYPE) == "pgsql") {
diff --git a/include/login_form.php b/include/login_form.php
index 537c7f994..168fe50aa 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -16,8 +16,8 @@
 
 	} ?>
 
-	<?php if (theme_exists(LOCAL_OVERRIDE_STYLESHEET)) {
-		echo stylesheet_tag(get_theme_path(LOCAL_OVERRIDE_STYLESHEET));
+	<?php if (theme_exists(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET))) {
+		echo stylesheet_tag(get_theme_path(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET)));
 	} ?>
 
 	<style type="text/css">
diff --git a/include/sanity_check.php b/include/sanity_check.php
index 5efd23d98..4831209ba 100755
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -103,8 +103,8 @@
 				}
 			}
 
-			if (!is_writable(ICONS_DIR)) {
-				array_push($errors, "ICONS_DIR defined in config.php is not writable (chmod -R 777 ".ICONS_DIR.").\n");
+			if (!is_writable(Config::get(Config::ICONS_DIR))) {
+				array_push($errors, "ICONS_DIR defined in config.php is not writable (chmod -R 777 ".Config::get(Config::ICONS_DIR).").\n");
 			}
 
 			if (!is_writable(Config::get(Config::LOCK_DIRECTORY))) {
diff --git a/index.php b/index.php
index 8ba401c2d..73fccc3ea 100644
--- a/index.php
+++ b/index.php
@@ -17,7 +17,6 @@
 		get_include_path());
 
 	require_once "autoload.php";
-
 	require_once "sessions.php";
 	require_once "functions.php";
 	require_once "sanity_check.php";
@@ -44,8 +43,8 @@
 		}
 	} ?>
 
-	<?php if (theme_exists(LOCAL_OVERRIDE_STYLESHEET)) {
-		echo stylesheet_tag(get_theme_path(LOCAL_OVERRIDE_STYLESHEET));
+	<?php if (theme_exists(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET))) {
+		echo stylesheet_tag(get_theme_path(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET)));
 	} ?>
 
 	<script type="text/javascript">
diff --git a/phpstan.neon b/phpstan.neon
index ba425e3d9..29ca27d26 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -2,6 +2,7 @@ parameters:
    level: 5
    ignoreErrors:
 #      - '#Constant.*not found#'
+      - '#Constant.*\b(SUBSTRING_FOR_DATE|SCHEMA_VERSION|SELF_USER_AGENT|LABEL_BASE_INDEX|PLUGIN_FEED_BASE_INDEX)\b.*not found#'
       - '#Comparison operation ">" between int<1, max> and 0 is always true.#'
       - '#Access to an undefined property DOMNode::\$tagName.#'
       - '#Call to an undefined method DOMNode::(get|remove|set)Attribute.#'
diff --git a/plugins/af_proxy_http/init.php b/plugins/af_proxy_http/init.php
index a5ba1d62d..b03cacfe4 100644
--- a/plugins/af_proxy_http/init.php
+++ b/plugins/af_proxy_http/init.php
@@ -68,7 +68,7 @@ class Af_Proxy_Http extends Plugin {
 			header("Location: " . $this->cache->get_url($local_filename));
 			return;
 		} else {
-			$data = UrlHelper::fetch(["url" => $url, "max_size" => MAX_CACHE_FILE_SIZE]);
+			$data = UrlHelper::fetch(["url" => $url, "max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)]);
 
 			if ($data) {
 				if ($this->cache->put($local_filename, $data)) {
diff --git a/plugins/cache_starred_images/init.php b/plugins/cache_starred_images/init.php
index 9f17c492f..2dbdb99cc 100755
--- a/plugins/cache_starred_images/init.php
+++ b/plugins/cache_starred_images/init.php
@@ -136,7 +136,7 @@ class Cache_Starred_Images extends Plugin {
 		if (!$this->cache->exists($local_filename)) {
 			Debug::log("cache_images: downloading: $url to $local_filename", Debug::$LOG_VERBOSE);
 
-			$data = UrlHelper::fetch(["url" => $url, "max_size" => MAX_CACHE_FILE_SIZE]);
+			$data = UrlHelper::fetch(["url" => $url, "max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)]);
 
 			if ($data)
 				return $this->cache->put($local_filename, $data);;
diff --git a/prefs.php b/prefs.php
index f173d684b..b6026eb23 100644
--- a/prefs.php
+++ b/prefs.php
@@ -34,8 +34,8 @@
 		}
 	} ?>
 
-	<?php if (theme_exists(LOCAL_OVERRIDE_STYLESHEET)) {
-		echo stylesheet_tag(get_theme_path(LOCAL_OVERRIDE_STYLESHEET));
+	<?php if (theme_exists(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET))) {
+		echo stylesheet_tag(get_theme_path(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET)));
 	} ?>
 
 	<script type="text/javascript">
diff --git a/update.php b/update.php
index 4aff4a774..92a087a2e 100755
--- a/update.php
+++ b/update.php
@@ -212,7 +212,7 @@
 	}
 
 	if (isset($options["feeds"])) {
-		RSSUtils::update_daemon_common(DAEMON_FEED_LIMIT, $options);
+		RSSUtils::update_daemon_common(Config::get(Config::DAEMON_FEED_LIMIT), $options);
 		RSSUtils::housekeeping_common();
 
 		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_UPDATE_TASK, $options);
@@ -227,7 +227,7 @@
 			passthru(Config::get(Config::PHP_EXECUTABLE) . " " . $argv[0] ." --daemon-loop $quiet $log $log_level");
 
 			// let's enforce a minimum spawn interval as to not forkbomb the host
-			$spawn_interval = max(60, DAEMON_SLEEP_INTERVAL);
+			$spawn_interval = max(60, Config::get(Config::DAEMON_SLEEP_INTERVAL));
 
 			Debug::log("Sleeping for $spawn_interval seconds...");
 			sleep($spawn_interval);
@@ -255,7 +255,7 @@
 			Debug::log("warning: unable to create stampfile\n");
 		}
 
-		RSSUtils::update_daemon_common(isset($options["pidlock"]) ? 50 : DAEMON_FEED_LIMIT, $options);
+		RSSUtils::update_daemon_common(isset($options["pidlock"]) ? 50 : Config::get(Config::DAEMON_FEED_LIMIT), $options);
 
 		if (!isset($options["pidlock"]) || $options["task"] == 0)
 			RSSUtils::housekeeping_common();
diff --git a/update_daemon2.php b/update_daemon2.php
index b67fba37d..b0314f3e9 100755
--- a/update_daemon2.php
+++ b/update_daemon2.php
@@ -11,13 +11,6 @@
 	require_once "autoload.php";
 	require_once "functions.php";
 	require_once "config.php";
-
-	// defaults
-	if (!defined('PURGE_INTERVAL')) 						define('PURGE_INTERVAL', 3600); // seconds
-	if (!defined('MAX_CHILD_RUNTIME')) 					define('MAX_CHILD_RUNTIME', 1800); // seconds
-	if (!defined('MAX_JOBS')) 								define('MAX_JOBS', 2);
-	if (!defined('SPAWN_INTERVAL')) 						define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); // seconds
-
 	require_once "sanity_check.php";
 	require_once "db-prefs.php";
 
@@ -78,7 +71,7 @@
 		foreach (array_keys($ctimes) as $pid) {
 			$started = $ctimes[$pid];
 
-			if (time() - $started > MAX_CHILD_RUNTIME) {
+			if (time() - $started > Config::get(Config::DAEMON_MAX_CHILD_RUNTIME)) {
 				Debug::log("Child process with PID $pid seems to be stuck, aborting...");
 				posix_kill($pid, SIGKILL);
 			}
@@ -143,9 +136,9 @@
 		print "  --log FILE           - log messages to FILE\n";
         print "  --log-level N        - log verbosity level\n";
 		print "  --tasks N            - amount of update tasks to spawn\n";
-		print "                         default: " . MAX_JOBS . "\n";
+		print "                         default: " . Config::get(Config::DAEMON_MAX_JOBS) . "\n";
 		print "  --interval N         - task spawn interval\n";
-		print "                         default: " . SPAWN_INTERVAL . " seconds.\n";
+		print "                         default: " . Config::get(Config::DAEMON_SLEEP_INTERVAL) . " seconds.\n";
 		print "  --quiet              - don't output messages to stdout\n";
 		return;
 	}
@@ -170,14 +163,14 @@
 		Debug::log("Set to spawn " . $options["tasks"] . " children.");
 		$max_jobs = $options["tasks"];
 	} else {
-		$max_jobs = MAX_JOBS;
+		$max_jobs = Config::get(Config::DAEMON_MAX_JOBS);
 	}
 
 	if (isset($options["interval"])) {
 		Debug::log("Spawn interval: " . $options["interval"] . " seconds.");
 		$spawn_interval = $options["interval"];
 	} else {
-		$spawn_interval = SPAWN_INTERVAL;
+		$spawn_interval = Config::get(Config::DAEMON_SLEEP_INTERVAL);
 	}
 
 	// let's enforce a minimum spawn interval as to not forkbomb the host
-- 
cgit v1.2.3-54-g00ecf

From 8d2e3c2528e67f8650c122f014364a34bf690d2a Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Tue, 23 Feb 2021 22:26:07 +0300
Subject: drop errors.php and simplify error handling

(limited to 'include/login_form.php')

diff --git a/api/index.php b/api/index.php
index 4e2c06b9d..d85a1103c 100644
--- a/api/index.php
+++ b/api/index.php
@@ -34,9 +34,11 @@
 		if (!\Sessions\validate_session()) {
 			header("Content-Type: text/json");
 
-			print json_encode(array("seq" => -1,
-				"status" => 1,
-				"content" => array("error" => "NOT_LOGGED_IN")));
+			print json_encode([
+						"seq" => -1,
+						"status" => API::STATUS_ERR,
+						"content" => [ "error" => API::E_NOT_LOGGED_IN ]
+					]);
 
 			return;
 		}
diff --git a/backend.php b/backend.php
index 9bc1449d0..206d866b7 100644
--- a/backend.php
+++ b/backend.php
@@ -45,7 +45,7 @@
 	if (!empty($_SESSION["uid"])) {
 		if (!\Sessions\validate_session()) {
 			header("Content-Type: text/json");
-			print error_json(6);
+			print Errors::to_json(Errors::E_UNAUTHORIZED);
 			return;
 		}
 		UserHelper::load_user_plugins($_SESSION["uid"]);
@@ -106,7 +106,7 @@
 		if (strpos($method, "_") === 0) {
 			user_error("Refusing to invoke method $method of handler $op which starts with underscore.", E_USER_WARNING);
 			header("Content-Type: text/json");
-			print error_json(6);
+			print Errors::to_json(Errors::E_UNAUTHORIZED);
 			return;
 		}
 
@@ -130,7 +130,7 @@
 						} else {
 							user_error("Refusing to invoke method $method of handler $op which has required parameters.", E_USER_WARNING);
 							header("Content-Type: text/json");
-							print error_json(6);
+							print Errors::to_json(Errors::E_UNAUTHORIZED);
 						}
 					} else {
 						if (method_exists($handler, "catchall")) {
@@ -141,19 +141,19 @@
 					return;
 				} else {
 					header("Content-Type: text/json");
-					print error_json(6);
+					print Errors::to_json(Errors::E_UNAUTHORIZED);
 					return;
 				}
 			} else {
 				user_error("Refusing to invoke method $method of handler $op with invalid CSRF token.", E_USER_WARNING);
 				header("Content-Type: text/json");
-				print error_json(6);
+				print Errors::to_json(Errors::E_UNAUTHORIZED);
 				return;
 			}
 		}
 	}
 
 	header("Content-Type: text/json");
-	print error_json(13);
+	print Errors::to_json(Errors::E_UNKNOWN_METHOD);
 
 ?>
diff --git a/classes/api.php b/classes/api.php
index 6f3ee77db..1b3ee7d92 100755
--- a/classes/api.php
+++ b/classes/api.php
@@ -6,6 +6,13 @@ class API extends Handler {
 	const STATUS_OK  = 0;
 	const STATUS_ERR = 1;
 
+	const E_API_DISABLED = "API_DISABLED";
+	const E_NOT_LOGGED_IN = "NOT_LOGGED_IN";
+	const E_LOGIN_ERROR = "LOGIN_ERROR";
+	const E_INCORRECT_USAGE = "INCORRECT_USAGE";
+	const E_UNKNOWN_METHOD = "UNKNOWN_METHOD";
+	const E_OPERATION_FAILED = "E_OPERATION_FAILED";
+
 	private $seq;
 
 	private static function _param_to_bool($p) {
@@ -13,9 +20,11 @@ class API extends Handler {
 	}
 
 	private function _wrap($status, $reply) {
-		print json_encode(array("seq" => $this->seq,
-			"status" => $status,
-			"content" => $reply));
+		print json_encode([
+					"seq" => $this->seq,
+					"status" => $status,
+					"content" => $reply
+				]);
 	}
 
 	function before($method) {
@@ -23,12 +32,12 @@ class API extends Handler {
 			header("Content-Type: text/json");
 
 			if (empty($_SESSION["uid"]) && $method != "login" && $method != "isloggedin") {
-				$this->_wrap(self::STATUS_ERR, array("error" => 'NOT_LOGGED_IN'));
+				$this->_wrap(self::STATUS_ERR, array("error" => self::E_NOT_LOGGED_IN));
 				return false;
 			}
 
 			if (!empty($_SESSION["uid"]) && $method != "logout" && !get_pref('ENABLE_API_ACCESS')) {
-				$this->_wrap(self::STATUS_ERR, array("error" => 'API_DISABLED'));
+				$this->_wrap(self::STATUS_ERR, array("error" => self::E_API_DISABLED));
 				return false;
 			}
 
@@ -69,13 +78,13 @@ class API extends Handler {
 						"api_level" => self::API_LEVEL));
 				} else {                                                         // else we are not logged in
 					user_error("Failed login attempt for $login from " . UserHelper::get_user_ip(), E_USER_WARNING);
-					$this->_wrap(self::STATUS_ERR, array("error" => "LOGIN_ERROR"));
+					$this->_wrap(self::STATUS_ERR, array("error" => self::E_LOGIN_ERROR));
 				}
 			} else {
-				$this->_wrap(self::STATUS_ERR, array("error" => "API_DISABLED"));
+				$this->_wrap(self::STATUS_ERR, array("error" => self::E_API_DISABLED));
 			}
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => "LOGIN_ERROR"));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_LOGIN_ERROR));
 			return;
 		}
 	}
@@ -221,7 +230,7 @@ class API extends Handler {
 				$this->_wrap(self::STATUS_OK, $headlines);
 			}
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'INCORRECT_USAGE'));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_INCORRECT_USAGE));
 		}
 	}
 
@@ -281,7 +290,7 @@ class API extends Handler {
 				"updated" => $num_updated));
 
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'INCORRECT_USAGE'));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_INCORRECT_USAGE));
 		}
 
 	}
@@ -356,7 +365,7 @@ class API extends Handler {
 
 			$this->_wrap(self::STATUS_OK, $articles);
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'INCORRECT_USAGE'));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_INCORRECT_USAGE));
 		}
 	}
 
@@ -481,7 +490,7 @@ class API extends Handler {
 			$this->_wrap($reply[0], $reply[1]);
 
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'UNKNOWN_METHOD', "method" => $method));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_UNKNOWN_METHOD, "method" => $method));
 		}
 	}
 
@@ -493,7 +502,7 @@ class API extends Handler {
 		if (Article::_create_published_article($title, $url, $content, "", $_SESSION["uid"])) {
 			$this->_wrap(self::STATUS_OK, array("status" => 'OK'));
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'Publishing failed'));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_OPERATION_FAILED));
 		}
 	}
 
@@ -816,7 +825,7 @@ class API extends Handler {
 			Pref_Feeds::remove_feed($feed_id, $_SESSION["uid"]);
 			$this->_wrap(self::STATUS_OK, array("status" => "OK"));
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => "FEED_NOT_FOUND"));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_OPERATION_FAILED));
 		}
 	}
 
@@ -831,7 +840,7 @@ class API extends Handler {
 
 			$this->_wrap(self::STATUS_OK, array("status" => $rc));
 		} else {
-			$this->_wrap(self::STATUS_ERR, array("error" => 'INCORRECT_USAGE'));
+			$this->_wrap(self::STATUS_ERR, array("error" => self::E_INCORRECT_USAGE));
 		}
 	}
 
diff --git a/classes/feeds.php b/classes/feeds.php
index eaedc1aee..a38cbae97 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -499,15 +499,7 @@ class Feeds extends Handler_Protected {
 		// this is parsed by handleRpcJson() on first viewfeed() to set cdm expanded, etc
 		$reply['runtime-info'] = RPC::make_runtime_info();
 
-		$reply_json = json_encode($reply);
-
-		if (!$reply_json) {
-		    $reply_json = json_encode(["error" => ["code" => 15,
-                "message" => json_last_error_msg()]]);
-        }
-
-		print $reply_json;
-
+		print json_encode($reply);
 	}
 
 	private function _generate_dashboard_feed() {
diff --git a/classes/handler/public.php b/classes/handler/public.php
index 79dff37b5..42be6f713 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -240,7 +240,7 @@ class Handler_Public extends Handler {
 
 		} else {
 			header("Content-Type: text/plain; charset=utf-8");
-			print json_encode(array("error" => array("message" => "Unknown format")));
+			print "Unknown format: $format.";
 		}
 	}
 
@@ -290,7 +290,7 @@ class Handler_Public extends Handler {
 			header("Location: index.php");
 		} else {
 			header("Content-Type: text/json");
-			print error_json(6);
+			print Errors::to_json(Errors::E_UNAUTHORIZED);
 		}
 	}
 
@@ -408,7 +408,7 @@ class Handler_Public extends Handler {
 
 	function index() {
 		header("Content-Type: text/plain");
-		print error_json(13);
+		print Errors::to_json(Errors::E_UNKNOWN_METHOD);
 	}
 
 	function forgotpass() {
@@ -659,7 +659,7 @@ class Handler_Public extends Handler {
 			<div class="content">
 
 			<?php
-				@$op = clean($_REQUEST["subop"]);
+				@$op = clean($_REQUEST["subop"] ?? "");
 				$updater = new DbUpdater(Db::pdo(), Config::get(Config::DB_TYPE), SCHEMA_VERSION);
 
 				if ($op == "performupdate") {
@@ -802,17 +802,17 @@ class Handler_Public extends Handler {
 				} else {
 					user_error("PluginHandler[PUBLIC]: Requested private method '$method' of plugin '$plugin_name'.", E_USER_WARNING);
 					header("Content-Type: text/json");
-					print error_json(6);
+					print Errors::to_json(Errors::E_UNAUTHORIZED);
 				}
 			} else {
 				user_error("PluginHandler[PUBLIC]: Requested unknown method '$method' of plugin '$plugin_name'.", E_USER_WARNING);
 				header("Content-Type: text/json");
-				print error_json(13);
+				print Errors::to_json(Errors::E_UNKNOWN_METHOD);
 			}
 		} else {
 			user_error("PluginHandler[PUBLIC]: Requested method '$method' of unknown plugin '$plugin_name'.", E_USER_WARNING);
 			header("Content-Type: text/json");
-			print error_json(14);
+			print Errors::to_json(Errors::E_UNKNOWN_PLUGIN);
 		}
 	}
 
diff --git a/classes/pluginhandler.php b/classes/pluginhandler.php
index 608f80dcb..75b823822 100644
--- a/classes/pluginhandler.php
+++ b/classes/pluginhandler.php
@@ -15,15 +15,15 @@ class PluginHandler extends Handler_Protected {
 					$plugin->$method();
 				} else {
 					user_error("Rejected ${plugin_name}->${method}(): invalid CSRF token.", E_USER_WARNING);
-					print error_json(6);
+					print Errors::to_json(Errors::E_UNAUTHORIZED);
 				}
 			} else {
 				user_error("Rejected ${plugin_name}->${method}(): unknown method.", E_USER_WARNING);
-				print error_json(13);
+				print Errors::to_json(Errors::E_UNKNOWN_METHOD);
 			}
 		} else {
 			user_error("Rejected ${plugin_name}->${method}(): unknown plugin.", E_USER_WARNING);
-			print error_json(14);
+			print Errors::to_json(Errors::E_UNKNOWN_PLUGIN);
 		}
 	}
 }
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index 7c3a40647..086c52697 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -561,8 +561,6 @@ class Pref_Feeds extends Handler_Protected {
 					"all" => $this::get_ts_languages(),
 					]
 				]);
-		} else {
-			print json_encode(["error" => "FEED_NOT_FOUND"]);
 		}
 	}
 
diff --git a/classes/pref/labels.php b/classes/pref/labels.php
index 0b826e13f..5bc094d55 100644
--- a/classes/pref/labels.php
+++ b/classes/pref/labels.php
@@ -16,8 +16,6 @@ class Pref_Labels extends Handler_Protected {
 
 		if ($line = $sth->fetch(PDO::FETCH_ASSOC)) {
 			print json_encode($line);
-		} else {
-			print json_encode(["error" => "LABEL_NOT_FOUND"]);
 		}
 	}
 
diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index 7ee03c21f..0d0dcadbc 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -1063,7 +1063,7 @@ class Pref_Prefs extends Handler_Protected {
 			}
 		} else {
 			header("Content-Type: text/json");
-			print error_json(6);
+			print Errors::to_json(Errors::E_UNAUTHORIZED);
 		}
 	}
 
diff --git a/classes/pref/users.php b/classes/pref/users.php
index f30abe001..13f808cb3 100644
--- a/classes/pref/users.php
+++ b/classes/pref/users.php
@@ -19,8 +19,6 @@ class Pref_Users extends Handler_Administrative {
 						"user" => $row,
 						"access_level_names" => $access_level_names
 					]);
-			} else {
-				print json_encode(["error" => "USER_NOT_FOUND"]);
 			}
 		}
 
diff --git a/classes/rpc.php b/classes/rpc.php
index 52d514aae..d0388a066 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -118,16 +118,22 @@ class RPC extends Handler_Protected {
 		$_SESSION["hasSandbox"] = clean($_REQUEST["hasSandbox"]) === "true";
 		$_SESSION["clientTzOffset"] = clean($_REQUEST["clientTzOffset"]);
 
-		$reply = array();
+		$error = Errors::E_SUCCESS;
 
-		$reply['error'] = sanity_check();
+		if (get_schema_version(true) != SCHEMA_VERSION) {
+			$error = Errors::E_SCHEMA_MISMATCH;
+		}
+
+		if ($error == Errors::E_SUCCESS) {
+			$reply = [];
 
-		if ($reply['error']['code'] == 0) {
 			$reply['init-params'] = $this->make_init_params();
 			$reply['runtime-info'] = $this->make_runtime_info();
-		}
 
-		print json_encode($reply);
+			print json_encode($reply);
+		} else {
+			print Errors::to_json($error);
+		}
 	}
 
 	/*function completeLabels() {
@@ -315,10 +321,7 @@ class RPC extends Handler_Protected {
 				$msg, 'client-js:' . $file, $line, $context);
 
 			echo json_encode(array("message" => "HOST_ERROR_LOGGED"));
-		} else {
-			echo json_encode(array("error" => "MESSAGE_NOT_FOUND"));
 		}
-
 	}
 
 	function checkforupdates() {
diff --git a/errors.php b/errors.php
deleted file mode 100644
index 3195c4b64..000000000
--- a/errors.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-	set_include_path(__DIR__ ."/include" . PATH_SEPARATOR .
-		get_include_path());
-
-	require_once "functions.php";
-
-	function get_error_types() {
-		$ERRORS[0] = "";
-
-		$ERRORS[1] = __("This program requires XmlHttpRequest " .
-				"to function properly. Your browser doesn't seem to support it.");
-
-		$ERRORS[2] = __("This program requires cookies " .
-				"to function properly. Your browser doesn't seem to support them.");
-
-		$ERRORS[3] = __("Backend sanity check failed.");
-
-		$ERRORS[4] = __("Frontend sanity check failed.");
-
-		$ERRORS[5] = __("Incorrect database schema version. <a href='db-updater.php'>Please update</a>.");
-
-		$ERRORS[6] = __("Request not authorized.");
-
-		$ERRORS[7] = __("No operation to perform.");
-
-		$ERRORS[8] = __("Could not display feed: query failed. Please check label match syntax or local configuration.");
-
-		$ERRORS[8] = __("Denied. Your access level is insufficient to access this page.");
-
-		$ERRORS[9] = __("Configuration check failed");
-
-		$ERRORS[10] = __("Your version of MySQL is not currently supported. Please see official site for more information.");
-
-		$ERRORS[11] = "[This error is not returned by server]";
-
-		$ERRORS[12] = __("SQL escaping test failed, check your database and PHP configuration");
-
-		$ERRORS[13] = __("Method not found");
-
-		$ERRORS[14] = __("Plugin not found");
-
-		$ERRORS[15] = __("Encoding data as JSON failed");
-
-		return $ERRORS;
-	}
-
-	if ($_REQUEST['mode'] ?? "" == 'js') {
-		header("Content-Type: text/javascript; charset=UTF-8");
-
-		print "var ERRORS = [];\n";
-
-		foreach (get_error_types() as $id => $error) {
-
-			$error = preg_replace("/\n/", "", $error);
-			$error = preg_replace("/\"/", "\\\"", $error);
-
-			print "ERRORS[$id] = \"$error\";\n";
-		}
-	}
-?>
diff --git a/include/functions.php b/include/functions.php
index a698fa79d..d916301fb 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -323,20 +323,6 @@
 		}
 	}
 
-	function sanity_check() {
-		require_once 'errors.php';
-		$ERRORS = get_error_types();
-
-		$error_code = 0;
-		$schema_version = get_schema_version(true);
-
-		if ($schema_version != SCHEMA_VERSION) {
-			$error_code = 5;
-		}
-
-		return array("code" => $error_code, "message" => $ERRORS[$error_code]);
-	}
-
 	function file_is_locked($filename) {
 		if (file_exists(Config::get(Config::LOCK_DIRECTORY) . "/$filename")) {
 			if (function_exists('flock')) {
@@ -533,20 +519,6 @@
 		return file_exists("themes/$theme") || file_exists("themes.local/$theme");
 	}
 
-	/**
-	 * @SuppressWarnings(unused)
-	 */
-	function error_json($code) {
-		require_once "errors.php";
-		$ERRORS = get_error_types();
-
-		@$message = $ERRORS[$code];
-
-		return json_encode(array("error" =>
-			array("code" => $code, "message" => $message)));
-
-	}
-
 	function arr_qmarks($arr) {
 		return str_repeat('?,', count($arr) - 1) . '?';
 	}
diff --git a/include/login_form.php b/include/login_form.php
index 168fe50aa..06bf57470 100755
--- a/include/login_form.php
+++ b/include/login_form.php
@@ -6,11 +6,10 @@
 	<link rel="shortcut icon" type="image/png" href="images/favicon.png">
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 	<?php
-	foreach (array("lib/dojo/dojo.js",
+	foreach (["lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
 			 	"js/common.js",
-				"js/utility.js",
-				"errors.php?mode=js") as $jsfile) {
+				"js/utility.js"] as $jsfile) {
 
 		echo javascript_tag($jsfile);
 
diff --git a/index.php b/index.php
index 1f2802864..a21db6fc5 100644
--- a/index.php
+++ b/index.php
@@ -69,11 +69,10 @@
 	</script>
 
 	<?php
-	foreach (array("lib/dojo/dojo.js",
+	foreach (["lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
 				"js/tt-rss.js",
-				"js/common.js",
-				"errors.php?mode=js") as $jsfile) {
+				"js/common.js"] as $jsfile) {
 
 		echo javascript_tag($jsfile);
 
diff --git a/js/App.js b/js/App.js
index 68f3740c5..6cad062f0 100644
--- a/js/App.js
+++ b/js/App.js
@@ -407,23 +407,15 @@ const App = {
          const counters = reply['counters'];
          const runtime_info = reply['runtime-info'];
 
-         if (error) {
-            const code = error['code'];
-
-            if (code && code != 0) {
-               const msg = error['message'];
-
-               console.warn("[handleRpcJson] received fatal error ", code, msg);
-
-               /* global ERRORS */
-               this.Error.fatal(ERRORS[code], {info: msg, code: code});
-               return false;
-            }
+         if (error && error.code && error.code != App.Error.E_SUCCESS) {
+            console.warn("handleRpcJson: fatal error", error);
+            this.Error.fatal(error.code);
+            return false;
          }
 
          if (seq && this.get_seq() != seq) {
-            console.warn("[handleRpcJson] sequence mismatch: ", seq, '!=', this.get_seq());
-            return;
+            console.warn("handleRpcJson: sequence mismatch: ", seq, '!=', this.get_seq());
+            return false;
          }
 
          // not in preferences
@@ -442,10 +434,13 @@ const App = {
 
          if (netalert) netalert.hide();
 
+         return true;
       } else {
          if (netalert) netalert.show();
 
          Notify.error("Communication problem with server.");
+
+         return false;
 		}
 	},
 	parseRuntimeInfo: function(data) {
@@ -487,20 +482,6 @@ const App = {
 		PluginHost.run(PluginHost.HOOK_RUNTIME_INFO_LOADED, data);
 	},
 	backendSanityCallback: function(reply) {
-		if (!reply) {
-			this.Error.fatal(ERRORS[3]);
-			return;
-		}
-
-		if (reply['error']) {
-			const code = reply['error']['code'];
-
-			if (code && code != 0) {
-				return this.Error.fatal(ERRORS[code],
-					{code: code, info: reply['error']['message']});
-			}
-		}
-
 		console.log("sanity check ok");
 
 		const params = reply['init-params'];
@@ -547,24 +528,25 @@ const App = {
 		this.initSecondStage();
 	},
 	Error: {
+      E_SUCCESS: "E_SUCCESS",
+      E_UNAUTHORIZED: "E_UNAUTHORIZED",
+      E_SCHEMA_MISMATCH: "E_SCHEMA_MISMATCH",
 		fatal: function (error, params = {}) {
-			if (params.code) {
-				if (params.code == 6) {
-					window.location.href = "index.php";
-					return;
-				} else if (params.code == 5) {
-					window.location.href = "public.php?op=dbupdate";
-					return;
-				}
-			}
+         if (error == App.Error.E_UNAUTHORIZED) {
+            window.location.href = "index.php";
+            return;
+         } else if (error == App.Error.E_SCHEMA_MISMATCH) {
+            window.location.href = "public.php?op=dbupdate";
+            return;
+         }
 
-			return this.report(error,
+			return this.report(__("Fatal error: %s").replace("%s", error),
 				{...{title: __("Fatal error")}, ...params});
 		},
 		report: function(error, params = {}) {
 			if (!error) return;
 
-			console.error("[Error.report]", error, params);
+			console.error("error.report:", error, params);
 
 			const message = params.message ? params.message : error.toString();
 
diff --git a/js/common.js b/js/common.js
index df1bf8690..670ee1b30 100755
--- a/js/common.js
+++ b/js/common.js
@@ -179,7 +179,10 @@ const xhr = {
 				console.log('xhr.json', '<<<', obj);
 
 				if (obj && typeof App != "undefined")
-					App.handleRpcJson(obj);
+					if (!App.handleRpcJson(obj)) {
+						reject(obj);
+						return;
+					}
 
 				if (complete != undefined) complete(obj);
 
diff --git a/prefs.php b/prefs.php
index 851dd898a..57ddbba7c 100644
--- a/prefs.php
+++ b/prefs.php
@@ -51,11 +51,10 @@
 	</script>
 
 	<?php
-	foreach (array("lib/dojo/dojo.js",
+	foreach (["lib/dojo/dojo.js",
 				"lib/dojo/tt-rss-layer.js",
 				"js/common.js",
-				"js/prefs.js",
-				"errors.php?mode=js") as $jsfile) {
+				"js/prefs.js"] as $jsfile) {
 
 		echo javascript_tag($jsfile);
 
diff --git a/public.php b/public.php
index 43aa66c1d..28f95d0a9 100644
--- a/public.php
+++ b/public.php
@@ -37,7 +37,7 @@
 	if (strpos($method, "_") === 0) {
 		user_error("Refusing to invoke method $method which starts with underscore.", E_USER_WARNING);
 		header("Content-Type: text/json");
-		print error_json(6);
+		print Errors::to_json(Errors::E_UNAUTHORIZED);
 		return;
 	}
 
@@ -50,7 +50,7 @@
 			} else {
 				user_error("Refusing to invoke method $method which has required parameters.", E_USER_WARNING);
 				header("Content-Type: text/json");
-				print error_json(6);
+				print Errors::to_json(Errors::E_UNAUTHORIZED);
 			}
 		} else if (method_exists($handler, 'index')) {
 			$handler->index();
@@ -60,5 +60,5 @@
 	}
 
 	header("Content-Type: text/plain");
-	print error_json(13);
+	print Errors::to_json(Errors::E_UNKNOWN_METHOD);
 ?>
-- 
cgit v1.2.3-54-g00ecf