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/* Prototype JavaScript framework, version 1.6.1
* (c) 2005-2009 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: '1.6.1',

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.*Safari/.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');
var form = document.createElement('form');
var isSupported = false;

if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
isSupported = true;
}

div = form = null;

return isSupported;
})()
},

ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

emptyFunction: function() { },
K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
Prototype.BrowserFeatures.SpecificElementExtensions = false;


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;
}
};

/* Based on Alex Arnell's inheritance implementation. */

var Class = (function() {
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; i < properties.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;
var properties = Object.keys(source);

if (!Object.keys({ toString: true }).length) {
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().first() == "$super") {
var method = value;
value = (function(m) {
return function() { return ancestor[m].apply(this, arguments); };
})(property).wrap(method);

value.valueOf = method.valueOf.bind(method);
value.toString = method.toString.bind(method);
}
this.prototype[property] = value;
}

return this;
}

return {
create: create,
Methods: {
addMethods: addMethods
}
};
})();
(function() {

var _toString = Object.prototype.toString;

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(object) {
var type = typeof object;
switch (type) {
case 'undefined':
case 'function':
case 'unknown': return;
case 'boolean': return object.toString();
}

if (object === null) return 'null';
if (object.toJSON) return object.toJSON();
if (isElement(object)) return;

var results = [];
for (var property in object) {
var value = toJSON(object[property]);
if (!isUndefined(value))
results.push(property.toJSON() + ': ' + value);
}

return '{' + results.join(', ') + '}';
}

function toQueryString(object) {
return $H(object).toQueryString();
}

function toHTML(object) {
return object && object.toHTML ? object.toHTML() : String.interpret(object);
}

function keys(object) {
var results = [];
for (var property in object)
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) == "[object Array]";
}


function isHash(object) {
return object instanceof Hash;
}

function isFunction(object) {
return typeof object === "function";
}

function isString(object) {
return _toString.call(object) == "[object String]";
}

function isNumber(object) {
return _toString.call(object) == "[object Number]";
}

function isUndefined(object) {
return typeof object === "undefined";
}

extend(Object, {
extend: extend,
inspect: inspect,
toJSON: toJSON,
toQueryString: toQueryString,
toHTML: toHTML,
keys: keys,
values: values,
clone: clone,
isElement: isElement,
isArray: isArray,
isHash: isHash,
isFunction: isFunction,
isString: isString,
isNumber: isNumber,
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;
var __method = this, args = slice.call(arguments, 1);
return function() {
var a = merge(args, arguments);
return __method.apply(context, a);
}
}

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);
};
}

return {
argumentNames: argumentNames,
bind: bind,
bindAsEventListener: bindAsEventListener,
curry: curry,
delay: delay,
defer: defer,
wrap: wrap,
methodize: methodize
}
})());


Date.prototype.toJSON = function() {
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"';
};


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() {

function prepareReplacement(replacement) {
if (Object.isFunction(replacement)) return replacement;
var template = new Template(replacement);
return function(match) { return template.evaluate(match) };
}

function gsub(pattern, replacement) {
var result = '', source = this, match;
replacement = prepareReplacement(replacement);

if (Object.isString(pattern))
pattern = RegExp.escape(pattern);

if (!(pattern.length || pattern.source)) {
replacement = replacement('');
return replacement + source.split('').join(replacement) + replacement;
}

while (source.length > 0) {
if (match = source.match(pattern)) {
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');
var 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,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
}

function unescapeHTML() {
return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/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());
var value = pair.length > 1 ? pair.join('=') : pair[0];
if (value != undefined) 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() {
var parts = this.split('-'), len = parts.length;
if (len == 1) return parts[0];

var camelized = this.charAt(0) == '-'
? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
: parts[0];

for (var i = 1; i < len; i++)
camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

return camelized;
}

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 toJSON() {
return this.inspect(true);
}

function unfilterJSON(filter) {
return this.replace(filter || Prototype.JSONFilter, '$1');
}

function isJSON() {
var str = this;
if (str.blank()) return false;
str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
}

function evalJSON(sanitize) {
var json = this.unfilterJSON();
try {
if (!sanitize || json.isJSON()) return eval('(' + json + ')');
} catch (e) { }
throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
}

function include(pattern) {
return this.indexOf(pattern) > -1;
}

function startsWith(pattern) {
return this.indexOf(pattern) === 0;
}

function endsWith(pattern) {
var d = this.length - pattern.length;
return d >= 0 && this.lastIndexOf(pattern) === 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 ? 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,
toJSON: toJSON,
unfilterJSON: unfilterJSON,
isJSON: isJSON,
evalJSON: evalJSON,
include: include,
startsWith: startsWith,
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];
var 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) {
var index = 0;
try {
this._each(function(value) {
iterator.call(context, value, index++);
});
} 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);
if (!result) throw $break;
});
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))
throw $break;
});
return result;
}

function collect(iterator, context) {
iterator = iterator || Prototype.K;
var results = [];
this.each(function(value, index) {
results.push(iterator.call(context, value, index));
});
return results;
}

function detect(iterator, context) {
var result;
this.each(function(value, index) {
if (iterator.call(context, value, index)) {
result = value;
throw $break;
}
});
return result;
}

function findAll(iterator, context) {
var results = [];
this.each(function(value, index) {
if (iterator.call(context, value, index))
results.push(value);
});
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));
});
return results;
}

function include(object) {
if (Object.isFunction(this.indexOf))
if (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);
});
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);
if (result == null || value >= result)
result = value;
});
return result;
}

function min(iterator, context) {
iterator = iterator || Prototype.K;
var result;
this.each(function(value, index) {
value = iterator.call(context, value, index);
if (result == null || value < result)
result = value;
});
return result;
}

function partition(iterator, context) {
iterator = iterator || Prototype.K;
var trues = [], falses = [];
this.each(function(value, index) {
(iterator.call(context, value, index) ?
trues : falses).push(value);
});
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))
results.push(value);
});
return results;
}

function sortBy(iterator, context) {
return this.map(function(value, index) {
return {
value: value,
criteria: iterator.call(context, value, index)
};
}).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) {
for (var i = 0, length = this.length; i < length; i++)
iterator(this[i]);
}
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 : this.toArray())._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.detect(function(value) { return item === value });
});
}


function clone() {
return slice.call(this, 0);
}

function size() {
return this.length;
}

function inspect() {
return '[' + this.map(Object.inspect).join(', ') + ']';
}

function toJSON() {
var results = [];
this.each(function(object) {
var value = Object.toJSON(object);
if (!Object.isUndefined(value)) results.push(value);
});
return '[' + results.join(', ') + ']';
}

function indexOf(item, i) {
i || (i = 0);
var length = this.length;
if (i < 0) i = length + i;
for (; i < length; i++)
if (this[i] === item) return i;
return -1;
}

function lastIndexOf(item, i) {
i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
var n = this.slice(0, i).reverse().indexOf(item);
return (n < 0) ? n : i - n - 1;
}

function concat() {
var array = slice.call(this, 0), item;
for (var i = 0, length = arguments.length; i < length; i++) {
item = arguments[i];
if (Object.isArray(item) && !('callee' in item)) {
for (var j = 0, arrayLength = item.length; j < arrayLength; j++)
array.push(item[j]);
} else {
array.push(item);
}
}
return array;
}

Object.extend(arrayProto, Enumerable);

if (!arrayProto._reverse)
arrayProto._reverse = arrayProto.reverse;

Object.extend(arrayProto, {
_each: _each,
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,
toJSON: toJSON
});

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) {
for (var key in this._object) {
var value = this._object[key], pair = [key, value];
pair.key = key;
pair.value = value;
iterator(pair);
}
}

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;
return key + '=' + encodeURIComponent(String.interpret(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))
return results.concat(values.map(toQueryPair.curry(key)));
} 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 toJSON() {
return Object.toJSON(this.toObject());
}

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: toJSON,
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 toJSON() {
return isFinite(this) ? this.toString() : 'null';
}

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,
toJSON: toJSON,
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) {
var value = this.start;
while (this.include(value)) {
iterator(value);
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 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) {
this.responders._each(iterator);
},

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.isString(this.options.parameters))
this.options.parameters = this.options.parameters.toQueryParams();
else 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.clone(this.options.parameters);

if (!['get', 'post'].include(this.method)) {
params['_method'] = this.method;
this.method = 'post';
}

this.parameters = params;

if (params = Object.toQueryString(params)) {
if (this.method == 'get')
this.url += (this.url.include('?') ? '&' : '?') + params;
else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
params += '&_=';
}

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)
this.transport.setRequestHeader(name, headers[name]);
},

success: function() {
var status = this.getStatus();
return !status || (status >= 200 && status < 300);
},

getStatus: function() {
try {
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;
json = decodeURIComponent(escape(json));
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 $(element) {
if (arguments.length > 1) {
for (var i = 0, elements = [], length = arguments.length; i < length; i++)
elements.push($(arguments[i]));
return elements;
}
if (Object.isString(element))
element = document.getElementById(element);
return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
document._getElementsByXPath = function(expression, parentElement) {
var results = [];
var query = document.evaluate(expression, $(parentElement) || document,
null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
for (var i = 0, length = query.snapshotLength; i < length; i++)
results.push(Element.extend(query.snapshotItem(i)));
return results;
};
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
Object.extend(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
});
}


(function(global) {

var SETATTRIBUTE_IGNORES_NAME = (function(){
var elForm = document.createElement("form");
var elInput = document.createElement("input");
var root = document.documentElement;
elInput.setAttribute("name", "test");
elForm.appendChild(elInput);
root.appendChild(elForm);
var isBuggy = elForm.elements
? (typeof elForm.elements.test == "undefined")
: null;
root.removeChild(elForm);
elForm = elInput = null;
return isBuggy;
})();

var element = global.Element;
global.Element = function(tagName, attributes) {
attributes = attributes || { };
tagName = tagName.toLowerCase();
var cache = Element.cache;
if (SETATTRIBUTE_IGNORES_NAME && attributes.name) {
tagName = '<' + tagName + ' name="' + attributes.name + '">';
delete attributes.name;
return Element.writeAttribute(document.createElement(tagName), attributes);
}
if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
};
Object.extend(global.Element, element || { });
if (element) global.Element.prototype = element.prototype;
})(this);

Element.cache = { };
Element.idCounter = 1;

Element.Methods = {
visible: function(element) {
return $(element).style.display != 'none';
},

toggle: function(element) {
element = $(element);
Element[Element.visible(element) ? 'hide' : 'show'](element);
return element;
},


hide: function(element) {
element = $(element);
element.style.display = 'none';
return element;
},

show: function(element) {
element = $(element);
element.style.display = '';
return element;
},

remove: function(element) {
element = $(element);
element.parentNode.removeChild(element);
return element;
},

update: (function(){

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 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);

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 (SELECT_ELEMENT_INNERHTML_BUGGY || TABLE_ELEMENT_INNERHTML_BUGGY) {
if (tagName in Element._insertionTranslations.tags) {
while (element.firstChild) {
element.removeChild(element.firstChild);
}
Element._getContentFromAnonymousElement(tagName, content.stripScripts())
.each(function(node) {
element.appendChild(node)
});
}
else {
element.innerHTML = content.stripScripts();
}
}
else {
element.innerHTML = content.stripScripts();
}

content.evalScripts.bind(content).defer();
return element;
}

return update;
})(),

replace: function(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;
},

insert: function(element, insertions) {
element = $(element);

if (Object.isString(insertions) || Object.isNumber(insertions) ||
Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
insertions = {bottom:insertions};

var content, insert, tagName, childNodes;

for (var position in insertions) {
content = insertions[position];
position = position.toLowerCase();
insert = Element._insertionTranslations[position];

if (content && content.toElement) content = content.toElement();
if (Object.isElement(content)) {
insert(element, content);
continue;
}

content = Object.toHTML(content);

tagName = ((position == 'before' || position == 'after')
? element.parentNode : element).tagName.toUpperCase();

childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

if (position == 'top' || position == 'after') childNodes.reverse();
childNodes.each(insert.curry(element));

content.evalScripts.bind(content).defer();
}

return element;
},

wrap: function(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;
},

inspect: function(element) {
element = $(element);
var result = '<' + element.tagName.toLowerCase();
$H({'id': 'id', 'className': 'class'}).each(function(pair) {
var property = pair.first(), attribute = pair.last();
var value = (element[property] || '').toString();
if (value) result += ' ' + attribute + '=' + value.inspect(true);
});
return result + '>';
},

recursivelyCollect: function(element, property) {
element = $(element);
var elements = [];
while (element = element[property])
if (element.nodeType == 1)
elements.push(Element.extend(element));
return elements;
},

ancestors: function(element) {
return Element.recursivelyCollect(element, 'parentNode');
},

descendants: function(element) {
return Element.select(element, "*");
},

firstDescendant: function(element) {
element = $(element).firstChild;
while (element && element.nodeType != 1) element = element.nextSibling;
return $(element);
},

immediateDescendants: function(element) {
if (!(element = $(element).firstChild)) return [];
while (element && element.nodeType != 1) element = element.nextSibling;
if (element) return [element].concat($(element).nextSiblings());
return [];
},

previousSiblings: function(element) {
return Element.recursivelyCollect(element, 'previousSibling');
},

nextSiblings: function(element) {
return Element.recursivelyCollect(element, 'nextSibling');
},

siblings: function(element) {
element = $(element);
return Element.previousSiblings(element).reverse()
.concat(Element.nextSiblings(element));
},

match: function(element, selector) {
if (Object.isString(selector))
selector = new Selector(selector);
return selector.match($(element));
},

up: function(element, expression, index) {
element = $(element);
if (arguments.length == 1) return $(element.parentNode);
var ancestors = Element.ancestors(element);
return Object.isNumber(expression) ? ancestors[expression] :
Selector.findElement(ancestors, expression, index);
},

down: function(element, expression, index) {
element = $(element);
if (arguments.length == 1) return Element.firstDescendant(element);
return Object.isNumber(expression) ? Element.descendants(element)[expression] :
Element.select(element, expression)[index || 0];
},

previous: function(element, expression, index) {
element = $(element);
if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
var previousSiblings = Element.previousSiblings(element);
return Object.isNumber(expression) ? previousSiblings[expression] :
Selector.findElement(previousSiblings, expression, index);
},

next: function(element, expression, index) {
element = $(element);
if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
var nextSiblings = Element.nextSiblings(element);
return Object.isNumber(expression) ? nextSiblings[expression] :
Selector.findElement(nextSiblings, expression, index);
},


select: function(element) {
var args = Array.prototype.slice.call(arguments, 1);
return Selector.findChildElements(element, args);
},

adjacent: function(element) {
var args = Array.prototype.slice.call(arguments, 1);
return Selector.findChildElements(element.parentNode, args).without(element);
},

identify: function(element) {
element = $(element);
var id = Element.readAttribute(element, 'id');
if (id) return id;
do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));
Element.writeAttribute(element, 'id', id);
return id;
},

readAttribute: function(element, name) {
element = $(element);
if (Prototype.Browser.IE) {
var t = Element._attributeTranslations.read;
if (t.values[name]) return t.values[name](element, name);
if (t.names[name]) name = t.names[name];
if (name.include(':')) {
return (!element.attributes || !element.attributes[name]) ? null :
element.attributes[name].value;
}
}
return element.getAttribute(name);
},

writeAttribute: function(element, name, value) {
element = $(element);
var attributes = { }, t = Element._attributeTranslations.write;

if (typeof name == 'object') attributes = name;
else attributes[name] = Object.isUndefined(value) ? true : value;

for (var attr in attributes) {
name = t.names[attr] || attr;
value = attributes[attr];
if (t.values[attr]) name = t.values[attr](element, value);
if (value === false || value === null)
element.removeAttribute(name);
else if (value === true)
element.setAttribute(name, name);
else element.setAttribute(name, value);
}
return element;
},

getHeight: function(element) {
return Element.getDimensions(element).height;
},

getWidth: function(element) {
return Element.getDimensions(element).width;
},

classNames: function(element) {
return new Element.ClassNames(element);
},

hasClassName: function(element, className) {
if (!(element = $(element))) return;
var elementClassName = element.className;
return (elementClassName.length > 0 && (elementClassName == className ||
new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
},

addClassName: function(element, className) {
if (!(element = $(element))) return;
if (!Element.hasClassName(element, className))
element.className += (element.className ? ' ' : '') + className;
return element;
},

removeClassName: function(element, className) {
if (!(element = $(element))) return;
element.className = element.className.replace(
new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
return element;
},

toggleClassName: function(element, className) {
if (!(element = $(element))) return;
return Element[Element.hasClassName(element, className) ?
'removeClassName' : 'addClassName'](element, className);
},

cleanWhitespace: function(element) {
element = $(element);
var node = element.firstChild;
while (node) {
var nextNode = node.nextSibling;
if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
element.removeChild(node);
node = nextNode;
}
return element;
},

empty: function(element) {
return $(element).innerHTML.blank();
},

descendantOf: function(element, ancestor) {
element = $(element), ancestor = $(ancestor);

if (element.compareDocumentPosition)
return (element.compareDocumentPosition(ancestor) & 8) === 8;

if (ancestor.contains)
return ancestor.contains(element) && ancestor !== element;

while (element = element.parentNode)
if (element == ancestor) return true;

return false;
},

scrollTo: function(element) {
element = $(element);
var pos = Element.cumulativeOffset(element);
window.scrollTo(pos[0], pos[1]);
return element;
},

getStyle: function(element, style) {
element = $(element);
style = style == 'float' ? 'cssFloat' : style.camelize();
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;
},

getOpacity: function(element) {
return $(element).getStyle('opacity');
},

setStyle: function(element, styles) {
element = $(element);
var elementStyle = element.style, match;
if (Object.isString(styles)) {
element.style.cssText += ';' + styles;
return styles.include('opacity') ?
element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
}
for (var property in styles)
if (property == 'opacity') element.setOpacity(styles[property]);
else
elementStyle[(property == 'float' || property == 'cssFloat') ?
(Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
property] = styles[property];

return element;
},

setOpacity: function(element, value) {
element = $(element);
element.style.opacity = (value == 1 || value === '') ? '' :
(value < 0.00001) ? 0 : value;
return element;
},

getDimensions: function(element) {
element = $(element);
var display = Element.getStyle(element, 'display');
if (display != 'none' && display != null) // Safari bug
return {width: element.offsetWidth, height: element.offsetHeight};

var els = element.style;
var originalVisibility = els.visibility;
var originalPosition = els.position;
var originalDisplay = els.display;
els.visibility = 'hidden';
if (originalPosition != 'fixed') // Switching fixed to absolute causes issues in Safari
els.position = 'absolute';
els.display = 'block';
var originalWidth = element.clientWidth;
var originalHeight = element.clientHeight;
els.display = originalDisplay;
els.position = originalPosition;
els.visibility = originalVisibility;
return {width: originalWidth, height: originalHeight};
},

makePositioned: function(element) {
element = $(element);
var pos = Element.getStyle(element, 'position');
if (pos == 'static' || !pos) {
element._madePositioned = true;
element.style.position = 'relative';
if (Prototype.Browser.Opera) {
element.style.top = 0;
element.style.left = 0;
}
}
return element;
},

undoPositioned: function(element) {
element = $(element);
if (element._madePositioned) {
element._madePositioned = undefined;
element.style.position =
element.style.top =
element.style.left =
element.style.bottom =
element.style.right = '';
}
return element;
},

makeClipping: function(element) {
element = $(element);
if (element._overflow) return element;
element._overflow = Element.getStyle(element, 'overflow') || 'auto';
if (element._overflow !== 'hidden')
element.style.overflow = 'hidden';
return element;
},

undoClipping: function(element) {
element = $(element);
if (!element._overflow) return element;
element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
element._overflow = null;
return element;
},

cumulativeOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
} while (element);
return Element._returnOffset(valueL, valueT);
},

positionedOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
if (element) {
if (element.tagName.toUpperCase() == 'BODY') break;
var p = Element.getStyle(element, 'position');
if (p !== 'static') break;
}
} while (element);
return Element._returnOffset(valueL, valueT);
},

absolutize: function(element) {
element = $(element);
if (Element.getStyle(element, 'position') == 'absolute') return element;

var offsets = Element.positionedOffset(element);
var top = offsets[1];
var left = offsets[0];
var width = element.clientWidth;
var height = element.clientHeight;

element._originalLeft = left - parseFloat(element.style.left || 0);
element._originalTop = top - parseFloat(element.style.top || 0);
element._originalWidth = element.style.width;
element._originalHeight = element.style.height;

element.style.position = 'absolute';
element.style.top = top + 'px';
element.style.left = left + 'px';
element.style.width = width + 'px';
element.style.height = height + 'px';
return element;
},

relativize: function(element) {
element = $(element);
if (Element.getStyle(element, 'position') == 'relative') return element;

element.style.position = 'relative';
var top = parseFloat(element.style.top || 0) - (element._originalTop || 0);
var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

element.style.top = top + 'px';
element.style.left = left + 'px';
element.style.height = element._originalHeight;
element.style.width = element._originalWidth;
return element;
},

cumulativeScrollOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.scrollTop || 0;
valueL += element.scrollLeft || 0;
element = element.parentNode;
} while (element);
return Element._returnOffset(valueL, valueT);
},

getOffsetParent: function(element) {
if (element.offsetParent) return $(element.offsetParent);
if (element == document.body) return $(element);

while ((element = element.parentNode) && element != document.body)
if (Element.getStyle(element, 'position') != 'static')
return $(element);

return $(document.body);
},

viewportOffset: function(forElement) {
var valueT = 0, valueL = 0;

var element = forElement;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;

if (element.offsetParent == document.body &&
Element.getStyle(element, 'position') == 'absolute') break;

} while (element = element.offsetParent);

element = forElement;
do {
if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
valueT -= element.scrollTop || 0;
valueL -= element.scrollLeft || 0;
}
} while (element = element.parentNode);

return Element._returnOffset(valueL, valueT);
},

clonePosition: function(element, source) {
var options = Object.extend({
setLeft: true,
setTop: true,
setWidth: true,
setHeight: true,
offsetTop: 0,
offsetLeft: 0
}, arguments[2] || { });

source = $(source);
var p = Element.viewportOffset(source);

element = $(element);
var delta = [0, 0];
var parent = null;
if (Element.getStyle(element, 'position') == 'absolute') {
parent = Element.getOffsetParent(element);
delta = Element.viewportOffset(parent);
}

if (parent == document.body) {
delta[0] -= document.body.offsetLeft;
delta[1] -= document.body.offsetTop;
}

if (options.setLeft) element.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
if (options.setTop) element.style.top = (p[1] - delta[1] + options.offsetTop) + 'px';
if (options.setWidth) element.style.width = source.offsetWidth + 'px';
if (options.setHeight) element.style.height = source.offsetHeight + 'px';
return element;
}
};

Object.extend(Element.Methods, {
getElementsBySelector: Element.Methods.select,

childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
write: {
names: {
className: 'class',
htmlFor: 'for'
},
values: { }
}
};

if (Prototype.Browser.Opera) {
Element.Methods.getStyle = Element.Methods.getStyle.wrap(
function(proceed, element, style) {
switch (style) {
case 'left': case 'top': case 'right': case 'bottom':
if (proceed(element, 'position') === 'static') return null;
case 'height': case 'width':
if (!Element.visible(element)) return null;

var dim = parseInt(proceed(element, style), 10);

if (dim !== element['offset' + style.capitalize()])
return dim + 'px';

var properties;
if (style === 'height') {
properties = ['border-top-width', 'padding-top',
'padding-bottom', 'border-bottom-width'];
}
else {
properties = ['border-left-width', 'padding-left',
'padding-right', 'border-right-width'];
}
return properties.inject(dim, function(memo, property) {
var val = proceed(element, property);
return val === null ? memo : memo - parseInt(val, 10);
}) + 'px';
default: return proceed(element, style);
}
}
);

Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
function(proceed, element, attribute) {
if (attribute === 'title') return element.title;
return proceed(element, attribute);
}
);
}

else if (Prototype.Browser.IE) {
Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
function(proceed, element) {
element = $(element);
try { element.offsetParent }
catch(e) { 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;
}
);

$w('positionedOffset viewportOffset').each(function(method) {
Element.Methods[method] = Element.Methods[method].wrap(
function(proceed, element) {
element = $(element);
try { element.offsetParent }
catch(e) { return Element._returnOffset(0,0) }
var position = element.getStyle('position');
if (position !== 'static') return proceed(element);
var offsetParent = element.getOffsetParent();
if (offsetParent && offsetParent.getStyle('position') === 'fixed')
offsetParent.setStyle({ zoom: 1 });
element.setStyle({ position: 'relative' });
var value = proceed(element);
element.setStyle({ position: position });
return value;
}
);
});

Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(
function(proceed, element) {
try { element.offsetParent }
catch(e) { return Element._returnOffset(0,0) }
return proceed(element);
}
);

Element.Methods.getStyle = function(element, style) {
element = $(element);
style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
var value = element.style[style];
if (!value && element.currentStyle) value = element.currentStyle[style];

if (style == 'opacity') {
if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
if (value[1]) return parseFloat(value[1]) / 100;
return 1.0;
}

if (value == 'auto') {
if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
return element['offset' + style.capitalize()] + 'px';
return null;
}
return value;
};

Element.Methods.setOpacity = function(element, value) {
function stripAlpha(filter){
return filter.replace(/alpha\([^\)]*\)/gi,'');
}
element = $(element);
var currentStyle = element.currentStyle;
if ((currentStyle && !currentStyle.hasLayout) ||
(!currentStyle && element.style.zoom == 'normal'))
element.style.zoom = 1;

var filter = element.getStyle('filter'), style = element.style;
if (value == 1 || value === '') {
(filter = stripAlpha(filter)) ?
style.filter = filter : style.removeAttribute('filter');
return element;
} else if (value < 0.00001) value = 0;
style.filter = stripAlpha(filter) +
'alpha(opacity=' + (value * 100) + ')';
return element;
};

Element._attributeTranslations = (function(){

var classProp = 'className';
var forProp = 'for';

var el = document.createElement('div');

el.setAttribute(classProp, 'x');

if (el.className !== 'x') {
el.setAttribute('class', 'x');
if (el.className === 'x') {
classProp = 'class';
}
}
el = null;

el = document.createElement('label');
el.setAttribute(forProp, 'x');
if (el.htmlFor !== 'x') {
el.setAttribute('htmlFor', 'x');
if (el.htmlFor === 'x') {
forProp = 'htmlFor';
}
}
el = null;

return {
read: {
names: {
'class': classProp,
'className': classProp,
'for': forProp,
'htmlFor': forProp
},
values: {
_getAttr: function(element, attribute) {
return element.getAttribute(attribute);
},
_getAttr2: function(element, attribute) {
return element.getAttribute(attribute, 2);
},
_getAttrNode: function(element, attribute) {
var node = element.getAttributeNode(attribute);
return node ? node.value : "";
},
_getEv: (function(){

var el = document.createElement('div');
el.onclick = Prototype.emptyFunction;
var value = el.getAttribute('onclick');
var f;

if (String(value).indexOf('{') > -1) {
f = function(element, attribute) {
attribute = element.getAttribute(attribute);
if (!attribute) return null;
attribute = attribute.toString();
attribute = attribute.split('{')[1];
attribute = attribute.split('}')[0];
return attribute.strip();
};
}
else if (value === '') {
f = function(element, attribute) {
attribute = element.getAttribute(attribute);
if (!attribute) return null;
return attribute.strip();
};
}
el = null;
return f;
})(),
_flag: function(element, attribute) {
return $(element).hasAttribute(attribute) ? attribute : null;
},
style: function(element) {
return element.style.cssText.toLowerCase();
},
title: function(element) {
return element.title;
}
}
}
}
})();

Element._attributeTranslations.write = {
names: Object.extend({
cellpadding: 'cellPadding',
cellspacing: 'cellSpacing'
}, Element._attributeTranslations.read.names),
values: {
checked: function(element, value) {
element.checked = !!value;
},

style: function(element, value) {
element.style.cssText = value ? value : '';
}
}
};

Element._attributeTranslations.has = {};

$w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
Element._attributeTranslations.has[attr.toLowerCase()] = attr;
});

(function(v) {
Object.extend(v, {
href: v._getAttr2,
src: v._getAttr2,
type: v._getAttr,
action: v._getAttrNode,
disabled: v._flag,
checked: v._flag,
readonly: v._flag,
multiple: v._flag,
onload: v._getEv,
onunload: v._getEv,
onclick: v._getEv,
ondblclick: v._getEv,
onmousedown: v._getEv,
onmouseup: v._getEv,
onmouseover: v._getEv,
onmousemove: v._getEv,
onmouseout: v._getEv,
onfocus: v._getEv,
onblur: v._getEv,
onkeypress: v._getEv,
onkeydown: v._getEv,
onkeyup: v._getEv,
onsubmit: v._getEv,
onreset: v._getEv,
onselect: v._getEv,
onchange: v._getEv
});
})(Element._attributeTranslations.read.values);

if (Prototype.BrowserFeatures.ElementExtensions) {
(function() {
function _descendants(element) {
var nodes = element.getElementsByTagName('*'), results = [];
for (var i = 0, node; node = nodes[i]; i++)
if (node.tagName !== "!") // Filter out comment nodes.
results.push(node);
return results;
}

Element.Methods.down = function(element, expression, index) {
element = $(element);
if (arguments.length == 1) return element.firstDescendant();
return Object.isNumber(expression) ? _descendants(element)[expression] :
Element.select(element, expression)[index || 0];
}
})();
}

}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
Element.Methods.setOpacity = function(element, value) {
element = $(element);
element.style.opacity = (value == 1) ? 0.999999 :
(value === '') ? '' : (value < 0.00001) ? 0 : value;
return element;
};
}

else if (Prototype.Browser.WebKit) {
Element.Methods.setOpacity = function(element, value) {
element = $(element);
element.style.opacity = (value == 1 || value === '') ? '' :
(value < 0.00001) ? 0 : value;

if (value == 1)
if(element.tagName.toUpperCase() == 'IMG' && element.width) {
element.width++; element.width--;
} else try {
var n = document.createTextNode(' ');
element.appendChild(n);
element.removeChild(n);
} catch (e) { }

return element;
};

Element.Methods.cumulativeOffset = function(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 Element._returnOffset(valueL, valueT);
};
}

if ('outerHTML' in document.documentElement) {
Element.Methods.replace = function(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 (Element._insertionTranslations.tags[tagName]) {
var nextSibling = element.next();
var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
parent.removeChild(element);
if (nextSibling)
fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
else
fragments.each(function(node) { parent.appendChild(node) });
}
else element.outerHTML = content.stripScripts();

content.evalScripts.bind(content).defer();
return element;
};
}

Element._returnOffset = function(l, t) {
var result = [l, t];
result.left = l;
result.top = t;
return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
if (t) {
div.innerHTML = t[0] + html + t[1];
t[2].times(function() { div = div.firstChild });
} else div.innerHTML = html;
return $A(div.childNodes);
};

Element._insertionTranslations = {
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]
}
};

(function() {
var tags = Element._insertionTranslations.tags;
Object.extend(tags, {
THEAD: tags.TBODY,
TFOOT: tags.TBODY,
TH: tags.TD
});
})();

Element.Methods.Simulated = {
hasAttribute: function(element, attribute) {
attribute = Element._attributeTranslations.has[attribute] || attribute;
var node = $(element).getAttributeNode(attribute);
return !!(node && node.specified);
}
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

(function(div) {

if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
window.HTMLElement = { };
window.HTMLElement.prototype = div['__proto__'];
Prototype.BrowserFeatures.ElementExtensions = true;
}

div = null;

})(document.createElement('div'))

Element.extend = (function() {

function checkDeficiency(tagName) {
if (typeof window.Element != 'undefined') {
var proto = window.Element.prototype;
if (proto) {
var id = '_' + (Math.random()+'').slice(2);
var el = document.createElement(tagName);
proto[id] = 'x';
var isBuggy = (el[id] !== 'x');
delete proto[id];
el = null;
return isBuggy;
}
}
return false;
}

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 HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');

if (Prototype.BrowserFeatures.SpecificElementExtensions) {
if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {
return function(element) {
if (element && typeof element._extendedByPrototype == 'undefined') {
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;
}
}
return Prototype.K;
}

var Methods = { }, ByTag = Element.Methods.ByTag;

var extend = Object.extend(function(element) {
if (!element || typeof element._extendedByPrototype != 'undefined' ||
element.nodeType != 1 || element == window) return element;

var methods = Object.clone(Methods),
tagName = element.tagName.toUpperCase();

if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

extendElementWith(element, methods);

element._extendedByPrototype = Prototype.emptyFunction;
return element;

}, {
refresh: function() {
if (!Prototype.BrowserFeatures.ElementExtensions) {
Object.extend(Methods, Element.Methods);
Object.extend(Methods, Element.Methods.Simulated);
}
}
});

extend.refresh();
return extend;
})();

Element.hasAttribute = function(element, attribute) {
if (element.hasAttribute) return element.hasAttribute(attribute);
return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

if (!methods) {
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)
});
}

if (arguments.length == 2) {
var tagName = methods;
methods = arguments[1];
}

if (!tagName) Object.extend(Element.Methods, methods || { });
else {
if (Object.isArray(tagName)) tagName.each(extend);
else extend(tagName);
}

function extend(tagName) {
tagName = tagName.toUpperCase();
if (!Element.Methods.ByTag[tagName])
Element.Methods.ByTag[tagName] = { };
Object.extend(Element.Methods.ByTag[tagName], methods);
}

function copy(methods, destination, onlyIfAbsent) {
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);
var proto = element['__proto__'] || element.constructor.prototype;
element = null;
return proto;
}

var elementPrototype = window.HTMLElement ? HTMLElement.prototype :
Element.prototype;

if (F.ElementExtensions) {
copy(Element.Methods, elementPrototype);
copy(Element.Methods.Simulated, elementPrototype, true);
}

if (F.SpecificElementExtensions) {
for (var tag in Element.Methods.ByTag) {
var klass = findDOMClass(tag);
if (Object.isUndefined(klass)) continue;
copy(T[tag], klass.prototype);
}
}

Object.extend(Element, Element.Methods);
delete Element.ByTag;

if (Element.extend.refresh) Element.extend.refresh();
Element.cache = { };
};


document.viewport = {

getDimensions: function() {
return { width: this.getWidth(), height: this.getHeight() };
},

getScrollOffsets: function() {
return Element._returnOffset(
window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
}
};

(function(viewport) {
var B = Prototype.Browser, doc = document, element, property = {};

function getRootElement() {
if (B.WebKit && !doc.evaluate)
return document;

if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
return document.body;

return document.documentElement;
}

function define(D) {
if (!element) element = getRootElement();

property[D] = 'client' + D;

viewport['get' + D] = function() { return element[property[D]] };
return viewport['get' + D]();
}

viewport.getWidth = define.curry('Width');

viewport.getHeight = define.curry('Height');
})(document.viewport);


Element.Storage = {
UID: 1
};

Element.addMethods({
getStorage: function(element) {
if (!(element = $(element))) return;

var uid;
if (element === window) {
uid = 0;
} else {
if (typeof element._prototypeUID === "undefined")
element._prototypeUID = [Element.Storage.UID++];
uid = element._prototypeUID[0];
}

if (!Element.Storage[uid])
Element.Storage[uid] = $H();

return Element.Storage[uid];
},

store: function(element, key, value) {
if (!(element = $(element))) return;

if (arguments.length === 2) {
Element.getStorage(element).update(key);
} else {
Element.getStorage(element).set(key, value);
}

return element;
},

retrieve: function(element, key, defaultValue) {
if (!(element = $(element))) return;
var hash = Element.getStorage(element), value = hash.get(key);

if (Object.isUndefined(value)) {
hash.set(key, defaultValue);
value = defaultValue;
}

return value;
},

clone: function(element, deep) {
if (!(element = $(element))) return;
var clone = element.cloneNode(deep);
clone._prototypeUID = void 0;
if (deep) {
var descendants = Element.select(clone, '*'),
i = descendants.length;
while (i--) {
descendants[i]._prototypeUID = void 0;
}
}
return Element.extend(clone);
}
});
/* Portions of the Selector class are derived from Jack Slocum's DomQuery,
* part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
* license. Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
initialize: function(expression) {
this.expression = expression.strip();

if (this.shouldUseSelectorsAPI()) {
this.mode = 'selectorsAPI';
} else if (this.shouldUseXPath()) {
this.mode = 'xpath';
this.compileXPathMatcher();
} else {
this.mode = "normal";
this.compileMatcher();
}

},

shouldUseXPath: (function() {

var IS_DESCENDANT_SELECTOR_BUGGY = (function(){
var isBuggy = false;
if (document.evaluate && window.XPathResult) {
var el = document.createElement('div');
el.innerHTML = '<ul><li></li></ul><div><ul><li></li></ul></div>';

var xpath = ".//*[local-name()='ul' or local-name()='UL']" +
"//*[local-name()='li' or local-name()='LI']";

var result = document.evaluate(xpath, el, null,
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

isBuggy = (result.snapshotLength !== 2);
el = null;
}
return isBuggy;
})();

return function() {
if (!Prototype.BrowserFeatures.XPath) return false;

var e = this.expression;

if (Prototype.Browser.WebKit &&
(e.include("-of-type") || e.include(":empty")))
return false;

if ((/(\[[\w-]*?:|:checked)/).test(e))
return false;

if (IS_DESCENDANT_SELECTOR_BUGGY) return false;

return true;
}

})(),

shouldUseSelectorsAPI: function() {
if (!Prototype.BrowserFeatures.SelectorsAPI) return false;

if (Selector.CASE_INSENSITIVE_CLASS_NAMES) return false;

if (!Selector._div) Selector._div = new Element('div');

try {
Selector._div.querySelector(this.expression);
} catch(e) {
return false;
}

return true;
},

compileMatcher: function() {
var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
c = Selector.criteria, le, p, m, len = ps.length, name;

if (Selector._cache[e]) {
this.matcher = Selector._cache[e];
return;
}

this.matcher = ["this.matcher = function(root) {",
"var r = root, h = Selector.handlers, c = false, n;"];

while (e && le != e && (/\S/).test(e)) {
le = e;
for (var i = 0; i<len; i++) {
p = ps[i].re;
name = ps[i].name;
if (m = e.match(p)) {
this.matcher.push(Object.isFunction(c[name]) ? c[name](m) :
new Template(c[name]).evaluate(m));
e = e.replace(m[0], '');
break;
}
}
}

this.matcher.push("return h.unique(n);\n}");
eval(this.matcher.join('\n'));
Selector._cache[this.expression] = this.matcher;
},

compileXPathMatcher: function() {
var e = this.expression, ps = Selector.patterns,
x = Selector.xpath, le, m, len = ps.length, name;

if (Selector._cache[e]) {
this.xpath = Selector._cache[e]; return;
}

this.matcher = ['.//*'];
while (e && le != e && (/\S/).test(e)) {
le = e;
for (var i = 0; i<len; i++) {
name = ps[i].name;
if (m = e.match(ps[i].re)) {
this.matcher.push(Object.isFunction(x[name]) ? x[name](m) :
new Template(x[name]).evaluate(m));
e = e.replace(m[0], '');
break;
}
}
}

this.xpath = this.matcher.join('');
Selector._cache[this.expression] = this.xpath;
},

findElements: function(root) {
root = root || document;
var e = this.expression, results;

switch (this.mode) {
case 'selectorsAPI':
if (root !== document) {
var oldId = root.id, id = $(root).identify();
id = id.replace(/([\.:])/g, "\\$1");
e = "#" + id + " " + e;
}

results = $A(root.querySelectorAll(e)).map(Element.extend);
root.id = oldId;

return results;
case 'xpath':
return document._getElementsByXPath(this.xpath, root);
default:
return this.matcher(root);
}
},

match: function(element) {
this.tokens = [];

var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
var le, p, m, len = ps.length, name;

while (e && le !== e && (/\S/).test(e)) {
le = e;
for (var i = 0; i<len; i++) {
p = ps[i].re;
name = ps[i].name;
if (m = e.match(p)) {
if (as[name]) {
this.tokens.push([name, Object.clone(m)]);
e = e.replace(m[0], '');
} else {
return this.findElements(document).include(element);
}
}
}
}

var match = true, name, matches;
for (var i = 0, token; token = this.tokens[i]; i++) {
name = token[0], matches = token[1];
if (!Selector.assertions[name](element, matches)) {
match = false; break;
}
}

return match;
},

toString: function() {
return this.expression;
},

inspect: function() {
return "#<Selector:" + this.expression.inspect() + ">";
}
});

if (Prototype.BrowserFeatures.SelectorsAPI &&
document.compatMode === 'BackCompat') {
Selector.CASE_INSENSITIVE_CLASS_NAMES = (function(){
var div = document.createElement('div'),
span = document.createElement('span');

div.id = "prototype_test_id";
span.className = 'Test';
div.appendChild(span);
var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);
div = span = null;
return isIgnored;
})();
}

Object.extend(Selector, {
_cache: { },

xpath: {
descendant: "//*",
child: "/*",
adjacent: "/following-sibling::*[1]",
laterSibling: '/following-sibling::*',
tagName: function(m) {
if (m[1] == '*') return '';
return "[local-name()='" + m[1].toLowerCase() +
"' or local-name()='" + m[1].toUpperCase() + "']";
},
className: "[contains(concat(' ', @class, ' '), ' #{1} ')]",
id: "[@id='#{1}']",
attrPresence: function(m) {
m[1] = m[1].toLowerCase();
return new Template("[@#{1}]").evaluate(m);
},
attr: function(m) {
m[1] = m[1].toLowerCase();
m[3] = m[5] || m[6];
return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
},
pseudo: function(m) {
var h = Selector.xpath.pseudos[m[1]];
if (!h) return '';
if (Object.isFunction(h)) return h(m);
return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
},
operators: {
'=': "[@#{1}='#{3}']",
'!=': "[@#{1}!='#{3}']",
'^=': "[starts-with(@#{1}, '#{3}')]",
'$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
'*=': "[contains(@#{1}, '#{3}')]",
'~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
'|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
},
pseudos: {
'first-child': '[not(preceding-sibling::*)]',
'last-child': '[not(following-sibling::*)]',
'only-child': '[not(preceding-sibling::* or following-sibling::*)]',
'empty': "[count(*) = 0 and (count(text()) = 0)]",
'checked': "[@checked]",
'disabled': "[(@disabled) and (@type!='hidden')]",
'enabled': "[not(@disabled) and (@type!='hidden')]",
'not': function(m) {
var e = m[6], p = Selector.patterns,
x = Selector.xpath, le, v, len = p.length, name;

var exclusion = [];
while (e && le != e && (/\S/).test(e)) {
le = e;
for (var i = 0; i<len; i++) {
name = p[i].name
if (m = e.match(p[i].re)) {
v = Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).evaluate(m);
exclusion.push("(" + v.substring(1, v.length - 1) + ")");
e = e.replace(m[0], '');
break;
}
}
}
return "[not(" + exclusion.join(" and ") + ")]";
},
'nth-child': function(m) {
return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
},
'nth-last-child': function(m) {
return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
},
'nth-of-type': function(m) {
return Selector.xpath.pseudos.nth("position() ", m);
},
'nth-last-of-type': function(m) {
return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
},
'first-of-type': function(m) {
m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
},
'last-of-type': function(m) {
m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
},
'only-of-type': function(m) {
var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
},
nth: function(fragment, m) {
var mm, formula = m[6], predicate;
if (formula == 'even') formula = '2n+0';
if (formula == 'odd') formula = '2n+1';
if (mm = formula.match(/^(\d+)$/)) // digit only
return '[' + fragment + "= " + mm[1] + ']';
if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
if (mm[1] == "-") mm[1] = -1;
var a = mm[1] ? Number(mm[1]) : 1;
var b = mm[2] ? Number(mm[2]) : 0;
predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
"((#{fragment} - #{b}) div #{a} >= 0)]";
return new Template(predicate).evaluate({
fragment: fragment, a: a, b: b });
}
}
}
},

criteria: {
tagName: 'n = h.tagName(n, r, "#{1}", c); c = false;',
className: 'n = h.className(n, r, "#{1}", c); c = false;',
id: 'n = h.id(n, r, "#{1}", c); c = false;',
attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
attr: function(m) {
m[3] = (m[5] || m[6]);
return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
},
pseudo: function(m) {
if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
},
descendant: 'c = "descendant";',
child: 'c = "child";',
adjacent: 'c = "adjacent";',
laterSibling: 'c = "laterSibling";'
},

patterns: [
{ name: 'laterSibling', re: /^\s*~\s*/ },
{ name: 'child', re: /^\s*>\s*/ },
{ name: 'adjacent', re: /^\s*\+\s*/ },
{ name: 'descendant', re: /^\s/ },

{ name: 'tagName', re: /^\s*(\*|[\w\-]+)(\b|$)?/ },
{ name: 'id', re: /^#([\w\-\*]+)(\b|$)/ },
{ name: 'className', re: /^\.([\w\-\*]+)(\b|$)/ },
{ name: 'pseudo', re: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/ },
{ name: 'attrPresence', re: /^\[((?:[\w-]+:)?[\w-]+)\]/ },
{ name: 'attr', re: /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/ }
],

assertions: {
tagName: function(element, matches) {
return matches[1].toUpperCase() == element.tagName.toUpperCase();
},

className: function(element, matches) {
return Element.hasClassName(element, matches[1]);
},

id: function(element, matches) {
return element.id === matches[1];
},

attrPresence: function(element, matches) {
return Element.hasAttribute(element, matches[1]);
},

attr: function(element, matches) {
var nodeValue = Element.readAttribute(element, matches[1]);
return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
}
},

handlers: {
concat: function(a, b) {
for (var i = 0, node; node = b[i]; i++)
a.push(node);
return a;
},

mark: function(nodes) {
var _true = Prototype.emptyFunction;
for (var i = 0, node; node = nodes[i]; i++)
node._countedByPrototype = _true;
return nodes;
},

unmark: (function(){

var PROPERTIES_ATTRIBUTES_MAP = (function(){
var el = document.createElement('div'),
isBuggy = false,
propName = '_countedByPrototype',
value = 'x'
el[propName] = value;
isBuggy = (el.getAttribute(propName) === value);
el = null;
return isBuggy;
})();

return PROPERTIES_ATTRIBUTES_MAP ?
function(nodes) {
for (var i = 0, node; node = nodes[i]; i++)
node.removeAttribute('_countedByPrototype');
return nodes;
} :
function(nodes) {
for (var i = 0, node; node = nodes[i]; i++)
node._countedByPrototype = void 0;
return nodes;
}
})(),

index: function(parentNode, reverse, ofType) {
parentNode._countedByPrototype = Prototype.emptyFunction;
if (reverse) {
for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
var node = nodes[i];
if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
}
} else {
for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
}
},

unique: function(nodes) {
if (nodes.length == 0) return nodes;
var results = [], n;
for (var i = 0, l = nodes.length; i < l; i++)
if (typeof (n = nodes[i])._countedByPrototype == 'undefined') {
n._countedByPrototype = Prototype.emptyFunction;
results.push(Element.extend(n));
}
return Selector.handlers.unmark(results);
},

descendant: function(nodes) {
var h = Selector.handlers;
for (var i = 0, results = [], node; node = nodes[i]; i++)
h.concat(results, node.getElementsByTagName('*'));
return results;
},

child: function(nodes) {
var h = Selector.handlers;
for (var i = 0, results = [], node; node = nodes[i]; i++) {
for (var j = 0, child; child = node.childNodes[j]; j++)
if (child.nodeType == 1 && child.tagName != '!') results.push(child);
}
return results;
},

adjacent: function(nodes) {
for (var i = 0, results = [], node; node = nodes[i]; i++) {
var next = this.nextElementSibling(node);
if (next) results.push(next);
}
return results;
},

laterSibling: function(nodes) {
var h = Selector.handlers;
for (var i = 0, results = [], node; node = nodes[i]; i++)
h.concat(results, Element.nextSiblings(node));
return results;
},

nextElementSibling: function(node) {
while (node = node.nextSibling)
if (node.nodeType == 1) return node;
return null;
},

previousElementSibling: function(node) {
while (node = node.previousSibling)
if (node.nodeType == 1) return node;
return null;
},

tagName: function(nodes, root, tagName, combinator) {
var uTagName = tagName.toUpperCase();
var results = [], h = Selector.handlers;
if (nodes) {
if (combinator) {
if (combinator == "descendant") {
for (var i = 0, node; node = nodes[i]; i++)
h.concat(results, node.getElementsByTagName(tagName));
return results;
} else nodes = this[combinator](nodes);
if (tagName == "*") return nodes;
}
for (var i = 0, node; node = nodes[i]; i++)
if (node.tagName.toUpperCase() === uTagName) results.push(node);
return results;
} else return root.getElementsByTagName(tagName);
},

id: function(nodes, root, id, combinator) {
var targetNode = $(id), h = Selector.handlers;

if (root == document) {
if (!targetNode) return [];
if (!nodes) return [targetNode];
} else {
if (!root.sourceIndex || root.sourceIndex < 1) {
var nodes = root.getElementsByTagName('*');
for (var j = 0, node; node = nodes[j]; j++) {
if (node.id === id) return [node];
}
}
}

if (nodes) {
if (combinator) {
if (combinator == 'child') {
for (var i = 0, node; node = nodes[i]; i++)
if (targetNode.parentNode == node) return [targetNode];
} else if (combinator == 'descendant') {
for (var i = 0, node; node = nodes[i]; i++)
if (Element.descendantOf(targetNode, node)) return [targetNode];
} else if (combinator == 'adjacent') {
for (var i = 0, node; node = nodes[i]; i++)
if (Selector.handlers.previousElementSibling(targetNode) == node)
return [targetNode];
} else nodes = h[combinator](nodes);
}
for (var i = 0, node; node = nodes[i]; i++)
if (node == targetNode) return [targetNode];
return [];
}
return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
},

className: function(nodes, root, className, combinator) {
if (nodes && combinator) nodes = this[combinator](nodes);
return Selector.handlers.byClassName(nodes, root, className);
},

byClassName: function(nodes, root, className) {
if (!nodes) nodes = Selector.handlers.descendant([root]);
var needle = ' ' + className + ' ';
for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
nodeClassName = node.className;
if (nodeClassName.length == 0) continue;
if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
results.push(node);
}
return results;
},

attrPresence: function(nodes, root, attr, combinator) {
if (!nodes) nodes = root.getElementsByTagName("*");
if (nodes && combinator) nodes = this[combinator](nodes);
var results = [];
for (var i = 0, node; node = nodes[i]; i++)
if (Element.hasAttribute(node, attr)) results.push(node);
return results;
},

attr: function(nodes, root, attr, value, operator, combinator) {
if (!nodes) nodes = root.getElementsByTagName("*");
if (nodes && combinator) nodes = this[combinator](nodes);
var handler = Selector.operators[operator], results = [];
for (var i = 0, node; node = nodes[i]; i++) {
var nodeValue = Element.readAttribute(node, attr);
if (nodeValue === null) continue;
if (handler(nodeValue, value)) results.push(node);
}
return results;
},

pseudo: function(nodes, name, value, root, combinator) {
if (nodes && combinator) nodes = this[combinator](nodes);
if (!nodes) nodes = root.getElementsByTagName("*");
return Selector.pseudos[name](nodes, value, root);
}
},

pseudos: {
'first-child': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++) {
if (Selector.handlers.previousElementSibling(node)) continue;
results.push(node);
}
return results;
},
'last-child': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++) {
if (Selector.handlers.nextElementSibling(node)) continue;
results.push(node);
}
return results;
},
'only-child': function(nodes, value, root) {
var h = Selector.handlers;
for (var i = 0, results = [], node; node = nodes[i]; i++)
if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
results.push(node);
return results;
},
'nth-child': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, formula, root);
},
'nth-last-child': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, formula, root, true);
},
'nth-of-type': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, formula, root, false, true);
},
'nth-last-of-type': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, formula, root, true, true);
},
'first-of-type': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, "1", root, false, true);
},
'last-of-type': function(nodes, formula, root) {
return Selector.pseudos.nth(nodes, "1", root, true, true);
},
'only-of-type': function(nodes, formula, root) {
var p = Selector.pseudos;
return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
},

getIndices: function(a, b, total) {
if (a == 0) return b > 0 ? [b] : [];
return $R(1, total).inject([], function(memo, i) {
if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
return memo;
});
},

nth: function(nodes, formula, root, reverse, ofType) {
if (nodes.length == 0) return [];
if (formula == 'even') formula = '2n+0';
if (formula == 'odd') formula = '2n+1';
var h = Selector.handlers, results = [], indexed = [], m;
h.mark(nodes);
for (var i = 0, node; node = nodes[i]; i++) {
if (!node.parentNode._countedByPrototype) {
h.index(node.parentNode, reverse, ofType);
indexed.push(node.parentNode);
}
}
if (formula.match(/^\d+$/)) { // just a number
formula = Number(formula);
for (var i = 0, node; node = nodes[i]; i++)
if (node.nodeIndex == formula) results.push(node);
} else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
if (m[1] == "-") m[1] = -1;
var a = m[1] ? Number(m[1]) : 1;
var b = m[2] ? Number(m[2]) : 0;
var indices = Selector.pseudos.getIndices(a, b, nodes.length);
for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
for (var j = 0; j < l; j++)
if (node.nodeIndex == indices[j]) results.push(node);
}
}
h.unmark(nodes);
h.unmark(indexed);
return results;
},

'empty': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++) {
if (node.tagName == '!' || node.firstChild) continue;
results.push(node);
}
return results;
},

'not': function(nodes, selector, root) {
var h = Selector.handlers, selectorType, m;
var exclusions = new Selector(selector).findElements(root);
h.mark(exclusions);
for (var i = 0, results = [], node; node = nodes[i]; i++)
if (!node._countedByPrototype) results.push(node);
h.unmark(exclusions);
return results;
},

'enabled': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++)
if (!node.disabled && (!node.type || node.type !== 'hidden'))
results.push(node);
return results;
},

'disabled': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++)
if (node.disabled) results.push(node);
return results;
},

'checked': function(nodes, value, root) {
for (var i = 0, results = [], node; node = nodes[i]; i++)
if (node.checked) results.push(node);
return results;
}
},

operators: {
'=': function(nv, v) { return nv == v; },
'!=': function(nv, v) { return nv != v; },
'^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },
'$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },
'*=': function(nv, v) { return nv == v || nv && nv.include(v); },
'~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
'|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +
'-').include('-' + (v || "").toUpperCase() + '-'); }
},

split: function(expression) {
var expressions = [];
expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
expressions.push(m[1].strip());
});
return expressions;
},

matchElements: function(elements, expression) {
var matches = $$(expression), h = Selector.handlers;
h.mark(matches);
for (var i = 0, results = [], element; element = elements[i]; i++)
if (element._countedByPrototype) results.push(element);
h.unmark(matches);
return results;
},

findElement: function(elements, expression, index) {
if (Object.isNumber(expression)) {
index = expression; expression = false;
}
return Selector.matchElements(elements, expression || '*')[index || 0];
},

findChildElements: function(element, expressions) {
expressions = Selector.split(expressions.join(','));
var results = [], h = Selector.handlers;
for (var i = 0, l = expressions.length, selector; i < l; i++) {
selector = new Selector(expressions[i].strip());
h.concat(results, selector.findElements(element));
}
return (l > 1) ? h.unique(results) : results;
}
});

if (Prototype.Browser.IE) {
Object.extend(Selector.handlers, {
concat: function(a, b) {
for (var i = 0, node; node = b[i]; i++)
if (node.tagName !== "!") a.push(node);
return a;
}
});
}

function $$() {
return Selector.findChildElements(document, $A(arguments));
}

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;

var data = elements.inject({ }, 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)))) {
if (key in result) {
if (!Object.isArray(result[key])) result[key] = [result[key]];
result[key].push(value);
}
else result[key] = value;
}
}
return result;
});

return options.hash ? data : Object.toQueryString(data);
}
};

Form.Methods = {
serialize: function(form, options) {
return Form.serializeElements(Form.getElements(form), options);
},

getElements: function(form) {
var elements = $(form).getElementsByTagName('*'),
element,
arr = [ ],
serializers = Form.Element.Serializers;
for (var i = 0; element = elements[i]; i++) {
arr.push(element);
}
return arr.inject([], function(elements, child) {
if (serializers[child.tagName.toLowerCase()])
elements.push(Element.extend(child));
return elements;
})
},

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);
form.findFirstElement().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 = {
input: function(element, value) {
switch (element.type.toLowerCase()) {
case 'checkbox':
case 'radio':
return Form.Element.Serializers.inputSelector(element, value);
default:
return Form.Element.Serializers.textarea(element, value);
}
},

inputSelector: function(element, value) {
if (Object.isUndefined(value)) return element.checked ? element.value : null;
else element.checked = !!value;
},

textarea: function(element, value) {
if (Object.isUndefined(value)) return element.value;
else element.value = value;
},

select: function(element, value) {
if (Object.isUndefined(value))
return this[element.type == 'select-one' ?
'selectOne' : 'selectMany'](element);
else {
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);
}
}
},

selectOne: function(element) {
var index = element.selectedIndex;
return index >= 0 ? this.optionValue(element.options[index]) : null;
},

selectMany: function(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(this.optionValue(opt));
}
return values;
},

optionValue: function(opt) {
return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
}
};

/*--------------------------------------------------------------------------*/


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() {

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,

cache: {}
};

var docEl = document.documentElement;
var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
&& 'onmouseleave' in docEl;

var _isButton;
if (Prototype.Browser.IE) {
var buttonMap = { 0: 1, 1: 4, 2: 2 };
_isButton = function(event, code) {
return event.button === buttonMap[code];
};
} else if (Prototype.Browser.WebKit) {
_isButton = function(event, code) {
switch (code) {
case 0: return event.which == 1 && !event.metaKey;
case 1: return event.which == 1 && event.metaKey;
default: return false;
}
};
} else {
_isButton = function(event, code) {
return event.which ? (event.which === code + 1) : (event.button === code);
};
}

function isLeftClick(event) { return _isButton(event, 0) }

function isMiddleClick(event) { return _isButton(event, 1) }

function isRightClick(event) { return _isButton(event, 2) }

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;
}

if (node.nodeType == Node.TEXT_NODE)
node = node.parentNode;

return Element.extend(node);
}

function findElement(event, expression) {
var element = Event.element(event);
if (!expression) return element;
var elements = [element].concat(element.ancestors());
return Selector.findElement(elements, expression, 0);
}

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 (Prototype.Browser.IE) {
function _relatedTarget(event) {
var element;
switch (event.type) {
case 'mouseover': element = event.fromElement; break;
case 'mouseout': element = event.toElement; break;
default: return null;
}
return Element.extend(element);
}

Object.extend(methods, {
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 (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
});

return Object.extend(event, methods);
};
} else {
Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
Object.extend(Event.prototype, methods);
Event.extend = Prototype.K;
}

function _createResponder(element, eventName, handler) {
var registry = Element.retrieve(element, 'prototype_event_registry');

if (Object.isUndefined(registry)) {
CACHE.push(element);
registry = Element.retrieve(element, 'prototype_event_registry', $H());
}

var respondersForEvent = registry.get(eventName);
if (Object.isUndefined(respondersForEvent)) {
respondersForEvent = [];
registry.set(eventName, respondersForEvent);
}

if (respondersForEvent.pluck('handler').include(handler)) return false;

var responder;
if (eventName.include(":")) {
responder = function(event) {
if (Object.isUndefined(event.eventName))
return false;

if (event.eventName !== eventName)
return false;

Event.extend(event, element);
handler.call(element, event);
};
} else {
if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
(eventName === "mouseenter" || eventName === "mouseleave")) {
if (eventName === "mouseenter" || eventName === "mouseleave") {
responder = function(event) {
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);
};
}
} else {
responder = function(event) {
Event.extend(event, element);
handler.call(element, event);
};
}
}

responder.handler = handler;
respondersForEvent.push(responder);
return responder;
}

function _destroyCache() {
for (var i = 0, length = CACHE.length; i < length; i++) {
Event.stopObserving(CACHE[i]);
CACHE[i] = null;
}
}

var CACHE = [];

if (Prototype.Browser.IE)
window.attachEvent('onunload', _destroyCache);

if (Prototype.Browser.WebKit)
window.addEventListener('unload', Prototype.emptyFunction, false);


var _getDOMEventName = Prototype.K;

if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
_getDOMEventName = function(eventName) {
var translations = { mouseenter: "mouseover", mouseleave: "mouseout" };
return eventName in translations ? translations[eventName] : eventName;
};
}

function observe(element, eventName, handler) {
element = $(element);

var responder = _createResponder(element, eventName, handler);

if (!responder) return element;

if (eventName.include(':')) {
if (element.addEventListener)
element.addEventListener("dataavailable", responder, false);
else {
element.attachEvent("ondataavailable", responder);
element.attachEvent("onfilterchange", responder);
}
} else {
var actualEventName = _getDOMEventName(eventName);

if (element.addEventListener)
element.addEventListener(actualEventName, responder, false);
else
element.attachEvent("on" + actualEventName, responder);
}

return element;
}

function stopObserving(element, eventName, handler) {
element = $(element);

var registry = Element.retrieve(element, 'prototype_event_registry');

if (Object.isUndefined(registry)) return element;

if (eventName && !handler) {
var responders = registry.get(eventName);

if (Object.isUndefined(responders)) return element;

responders.each( function(r) {
Element.stopObserving(element, eventName, r.handler);
});
return element;
} else if (!eventName) {
registry.each( function(pair) {
var eventName = pair.key, responders = pair.value;

responders.each( function(r) {
Element.stopObserving(element, eventName, r.handler);
});
});
return element;
}

var responders = registry.get(eventName);

if (!responders) return;

var responder = responders.find( function(r) { return r.handler === handler; });
if (!responder) return element;

var actualEventName = _getDOMEventName(eventName);

if (eventName.include(':')) {
if (element.removeEventListener)
element.removeEventListener("dataavailable", responder, false);
else {
element.detachEvent("ondataavailable", responder);
element.detachEvent("onfilterchange", responder);
}
} else {
if (element.removeEventListener)
element.removeEventListener(actualEventName, responder, false);
else
element.detachEvent('on' + actualEventName, responder);
}

registry.set(eventName, responders.without(responder));

return element;
}

function fire(element, eventName, memo, bubble) {
element = $(element);

if (Object.isUndefined(bubble))
bubble = true;

if (element == document && document.createEvent && !element.dispatchEvent)
element = document.documentElement;

var event;
if (document.createEvent) {
event = document.createEvent('HTMLEvents');
event.initEvent('dataavailable', true, true);
} else {
event = document.createEventObject();
event.eventType = bubble ? 'ondataavailable' : 'onfilterchange';
}

event.eventName = eventName;
event.memo = memo || { };

if (document.createEvent)
element.dispatchEvent(event);
else
element.fireEvent(event.eventType, event);

return Event.extend(event);
}


Object.extend(Event, Event.Methods);

Object.extend(Event, {
fire: fire,
observe: observe,
stopObserving: stopObserving
});

Element.addMethods({
fire: fire,

observe: observe,

stopObserving: stopObserving
});

Object.extend(document, {
fire: fire.methodize(),

observe: observe.methodize(),

stopObserving: stopObserving.methodize(),

loaded: false
});

if (window.Event) Object.extend(window.Event, Event);
else window.Event = Event;
})();

(function() {
/* 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.stopObserving('readystatechange', checkReadyState);
fireContentLoadedEvent();
}
}

function pollDoScroll() {
try { document.documentElement.doScroll('left'); }
catch(e) {
timer = pollDoScroll.defer();
return;
}
fireContentLoadedEvent();
}

if (document.addEventListener) {
document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
} else {
document.observe('readystatechange', checkReadyState);
if (window == top)
timer = pollDoScroll.defer();
}

Event.observe(window, 'load', fireContentLoadedEvent);
})();

Element.addMethods();

/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.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) {
this.element.className.split(/\s+/).select(function(name) {
return name.length > 0;
})._each(iterator);
},

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);

/*--------------------------------------------------------------------------*/
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