var Prototype={
 Version: '1.6.0',
 Browser: {
 IE: !!(window.attachEvent && !window.opera),
 Opera: !!window.opera,
 WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
 Gecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML')==-1,
 MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
 },
 BrowserFeatures: {
 XPath: !!document.evaluate,
 ElementExtensions: !!window.HTMLElement,
 SpecificElementExtensions:
 document.createElement('div').__proto__ &&
 document.createElement('div').__proto__ !==
 document.createElement('form').__proto__
 },
 ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
 JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
 emptyFunction: function() { },
 K: function(x) { return x }
};
if (Prototype.Browser.MobileSafari)
 Prototype.BrowserFeatures.SpecificElementExtensions=false;
if (Prototype.Browser.WebKit)
 Prototype.BrowserFeatures.XPath=false;
var Class={
 create: function() {
 var parent=null, properties=$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) {
 var subclass=function() { };
 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;
 }
};
Class.Methods={
 addMethods: function(source) {
 var ancestor=this.superclass && this.superclass.prototype;
 var properties=Object.keys(source);
 if (!Object.keys({ toString: true }).length)
 properties.push("toString", "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=Object.extend((function(m) {
  return function() { return ancestor[m].apply(this, arguments) };
 })(property).wrap(method), {
  valueOf: function() { return method },
  toString: function() { return method.toString() }
 });
 }
 this.prototype[property]=value;
 }
 return this;
 }
};
var Abstract={ };
Object.extend=function(destination, source) {
 for (var property in source)
 destination[property]=source[property];
 return destination;
};
Object.extend(Object, {
 inspect: function(object) {
 try {
 if (object === undefined) return 'undefined';
 if (object === null) return 'null';
 return object.inspect ? object.inspect() : object.toString();
 } catch (e) {
 if (e instanceof RangeError) return '...';
 throw e;
 }
 },
 toJSON: function(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 (Object.isElement(object)) return;
 var results=[];
 for (var property in object) {
 var value=Object.toJSON(object[property]);
 if (value !== undefined)
 results.push(property.toJSON() + ': ' + value);
 }
 return '{' + results.join(', ') + '}';
 },
 toQueryString: function(object) {
 return $H(object).toQueryString();
 },
 toHTML: function(object) {
 return object && object.toHTML ? object.toHTML() : String.interpret(object);
 },
 keys: function(object) {
 var keys=[];
 for (var property in object)
 keys.push(property);
 return keys;
 },
 values: function(object) {
 var values=[];
 for (var property in object)
 values.push(object[property]);
 return values;
 },
 clone: function(object) {
 return Object.extend({ }, object);
 },
 isElement: function(object) {
 return object && object.nodeType==1;
 },
 isArray: function(object) {
 return object && object.constructor === Array;
 },
 isHash: function(object) {
 return object instanceof Hash;
 },
 isFunction: function(object) {
 return typeof object=="function";
 },
 isString: function(object) {
 return typeof object=="string";
 },
 isNumber: function(object) {
 return typeof object=="number";
 },
 isUndefined: function(object) {
 return typeof object=="undefined";
 }
});
Object.extend(Function.prototype, {
 argumentNames: function() {
 var names=this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
 return names.length==1 && !names[0] ? [] : names;
 },
 bind: function() {
 if (arguments.length < 2 && arguments[0] === undefined) return this;
 var __method=this, args=$A(arguments), object=args.shift();
 return function() {
 return __method.apply(object, args.concat($A(arguments)));
 }
 },
 bindAsEventListener: function() {
 var __method=this, args=$A(arguments), object=args.shift();
 return function(event) {
 return __method.apply(object, [event || window.event].concat(args));
 }
 },
 curry: function() {
 if (!arguments.length) return this;
 var __method=this, args=$A(arguments);
 return function() {
 return __method.apply(this, args.concat($A(arguments)));
 }
 },
 delay: function() {
 var __method=this, args=$A(arguments), timeout=args.shift() * 1000;
 return window.setTimeout(function() {
 return __method.apply(__method, args);
 }, timeout);
 },
 wrap: function(wrapper) {
 var __method=this;
 return function() {
 return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
 }
 },
 methodize: function() {
 if (this._methodized) return this._methodized;
 var __method=this;
 return this._methodized=function() {
 return __method.apply(null, [this].concat($A(arguments)));
 };
 }
});
Function.prototype.defer=Function.prototype.delay.curry(0.01);
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"';
};
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;
 }
};
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();
 } finally {
 this.currentlyExecuting=false;
 }
 }
 }
});
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, {
 gsub: function(pattern, replacement) {
 var result='', source=this, match;
 replacement=arguments.callee.prepareReplacement(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;
 },
 sub: function(pattern, replacement, count) {
 replacement=this.gsub.prepareReplacement(replacement);
 count=count === undefined ? 1 : count;
 return this.gsub(pattern, function(match) {
 if (--count < 0) return match[0];
 return replacement(match);
 });
 },
 scan: function(pattern, iterator) {
 this.gsub(pattern, iterator);
 return String(this);
 },
 truncate: function(length, truncation) {
 length=length || 30;
 truncation=truncation === undefined ? '...' : truncation;
 return this.length > length ?
 this.slice(0, length - truncation.length) + truncation : String(this);
 },
 strip: function() {
 return this.replace(/^\s+/, '').replace(/\s+$/, '');
 },
 stripTags: function() {
 return this.replace(/<\/?[^>]+>/gi, '');
 },
 stripScripts: function() {
 return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
 },
 extractScripts: function() {
 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];
 });
 },
 evalScripts: function() {
 return this.extractScripts().map(function(script) { return eval(script) });
 },
 escapeHTML: function() {
 var self=arguments.callee;
 self.text.data=this;
 return self.div.innerHTML;
 },
 unescapeHTML: function() {
 var div=new Element('div');
 div.innerHTML=this.stripTags();
 return div.childNodes[0] ? (div.childNodes.length > 1 ?
 $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
 div.childNodes[0].nodeValue) : '';
 },
 toQueryParams: function(separator) {
 var match=this.strip().match(/([^?#]*)(#.*)?$/);
 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;
 });
 },
 toArray: function() {
 return this.split('');
 },
 succ: function() {
 return this.slice(0, this.length - 1) +
 String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
 },
 times: function(count) {
 return count < 1 ? '' : new Array(count + 1).join(this);
 },
 camelize: function() {
 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;
 },
 capitalize: function() {
 return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
 },
 underscore: function() {
 return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
 },
 dasherize: function() {
 return this.gsub(/_/,'-');
 },
 inspect: function(useDoubleQuotes) {
 var escapedString=this.gsub(/[\x00-\x1f\\]/, function(match) {
 var character=String.specialChar[match[0]];
 return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
 });
 if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
 return "'" + escapedString.replace(/'/g, '\\\'') + "'";
 },
 toJSON: function() {
 return this.inspect(true);
 },
 unfilterJSON: function(filter) {
 return this.sub(filter || Prototype.JSONFilter, '#{1}');
 },
 isJSON: function() {
 var str=this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
 return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
 },
 evalJSON: function(sanitize) {
 var json=this.unfilterJSON();
 try {
 if (!sanitize || json.isJSON()) return eval('(' + json + ')');
 } catch (e) { }
 throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
 },
 include: function(pattern) {
 return this.indexOf(pattern) > -1;
 },
 startsWith: function(pattern) {
 return this.indexOf(pattern) === 0;
 },
 endsWith: function(pattern) {
 var d=this.length - pattern.length;
 return d >= 0 && this.lastIndexOf(pattern) === d;
 },
 empty: function() {
 return this=='';
 },
 blank: function() {
 return /^\s*$/.test(this);
 },
 interpolate: function(object, pattern) {
 return new Template(this, pattern).evaluate(object);
 }
});
if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
 escapeHTML: function() {
 return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
 },
 unescapeHTML: function() {
 return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
 }
});
String.prototype.gsub.prepareReplacement=function(replacement) {
 if (Object.isFunction(replacement)) return replacement;
 var template=new Template(replacement);
 return function(match) { return template.evaluate(match) };
};
String.prototype.parseQuery=String.prototype.toQueryParams;
Object.extend(String.prototype.escapeHTML, {
 div: document.createElement('div'),
 text: document.createTextNode('')
});
with (String.prototype.escapeHTML) div.appendChild(text);
var Template=Class.create({
 initialize: function(template, pattern) {
 this.template=template.toString();
 this.pattern=pattern || Template.Pattern;
 },
 evaluate: function(object) {
 if (Object.isFunction(object.toTemplateReplacements))
 object=object.toTemplateReplacements();
 return this.template.gsub(this.pattern, function(match) {
 if (object==null) return '';
 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].gsub('\\\\]', ']') : 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);
 }.bind(this));
 }
});
Template.Pattern=/(^|.|\r|\n)(#\{(.*?)\})/;
var $break={ };
var Enumerable={
 each: function(iterator, context) {
 var index=0;
 iterator=iterator.bind(context);
 try {
 this._each(function(value) {
 iterator(value, index++);
 });
 } catch (e) {
 if (e != $break) throw e;
 }
 return this;
 },
 eachSlice: function(number, iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var index=-number, slices=[], array=this.toArray();
 while ((index += number) < array.length)
 slices.push(array.slice(index, index+number));
 return slices.collect(iterator, context);
 },
 all: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var result=true;
 this.each(function(value, index) {
 result=result && !!iterator(value, index);
 if (!result) throw $break;
 });
 return result;
 },
 any: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var result=false;
 this.each(function(value, index) {
 if (result=!!iterator(value, index))
 throw $break;
 });
 return result;
 },
 collect: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var results=[];
 this.each(function(value, index) {
 results.push(iterator(value, index));
 });
 return results;
 },
 detect: function(iterator, context) {
 iterator=iterator.bind(context);
 var result;
 this.each(function(value, index) {
 if (iterator(value, index)) {
 result=value;
 throw $break;
 }
 });
 return result;
 },
 findAll: function(iterator, context) {
 iterator=iterator.bind(context);
 var results=[];
 this.each(function(value, index) {
 if (iterator(value, index))
 results.push(value);
 });
 return results;
 },
 grep: function(filter, iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var results=[];
 if (Object.isString(filter))
 filter=new RegExp(filter);
 this.each(function(value, index) {
 if (filter.match(value))
 results.push(iterator(value, index));
 });
 return results;
 },
 include: function(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 $break;
 }
 });
 return found;
 },
 inGroupsOf: function(number, fillWith) {
 fillWith=fillWith === undefined ? null : fillWith;
 return this.eachSlice(number, function(slice) {
 while(slice.length < number) slice.push(fillWith);
 return slice;
 });
 },
 inject: function(memo, iterator, context) {
 iterator=iterator.bind(context);
 this.each(function(value, index) {
 memo=iterator(memo, value, index);
 });
 return memo;
 },
 invoke: function(method) {
 var args=$A(arguments).slice(1);
 return this.map(function(value) {
 return value[method].apply(value, args);
 });
 },
 max: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var result;
 this.each(function(value, index) {
 value=iterator(value, index);
 if (result==undefined || value >= result)
 result=value;
 });
 return result;
 },
 min: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var result;
 this.each(function(value, index) {
 value=iterator(value, index);
 if (result==undefined || value < result)
 result=value;
 });
 return result;
 },
 partition: function(iterator, context) {
 iterator=iterator ? iterator.bind(context) : Prototype.K;
 var trues=[], falses=[];
 this.each(function(value, index) {
 (iterator(value, index) ?
 trues : falses).push(value);
 });
 return [trues, falses];
 },
 pluck: function(property) {
 var results=[];
 this.each(function(value) {
 results.push(value[property]);
 });
 return results;
 },
 reject: function(iterator, context) {
 iterator=iterator.bind(context);
 var results=[];
 this.each(function(value, index) {
 if (!iterator(value, index))
 results.push(value);
 });
 return results;
 },
 sortBy: function(iterator, context) {
 iterator=iterator.bind(context);
 return this.map(function(value, index) {
 return {value: value, criteria: iterator(value, index)};
 }).sort(function(left, right) {
 var a=left.criteria, b=right.criteria;
 return a < b ? -1 : a > b ? 1 : 0;
 }).pluck('value');
 },
 toArray: function() {
 return this.map();
 },
 zip: function() {
 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));
 });
 },
 size: function() {
 return this.toArray().length;
 },
 inspect: function() {
 return '#<Enumerable:' + this.toArray().inspect() + '>';
 }
};
Object.extend(Enumerable, {
 map: Enumerable.collect,
 find: Enumerable.detect,
 select: Enumerable.findAll,
 filter: Enumerable.findAll,
 member: Enumerable.include,
 entries: Enumerable.toArray,
 every: Enumerable.all,
 some: Enumerable.any
});
function $A(iterable) {
 if (!iterable) return [];
 if (iterable.toArray) return iterable.toArray();
 var length=iterable.length, results=new Array(length);
 while (length--) results[length]=iterable[length];
 return results;
}
if (Prototype.Browser.WebKit) {
 function $A(iterable) {
 if (!iterable) return [];
 if (!(Object.isFunction(iterable) && iterable=='[object NodeList]') &&
 iterable.toArray) return iterable.toArray();
 var length=iterable.length, results=new Array(length);
 while (length--) results[length]=iterable[length];
 return results;
 }
}
Array.from=$A;
Object.extend(Array.prototype, Enumerable);
if (!Array.prototype._reverse) Array.prototype._reverse=Array.prototype.reverse;
Object.extend(Array.prototype, {
 _each: function(iterator) {
 for (var i=0, length=this.length; i < length; i++)
 iterator(this[i]);
 },
 clear: function() {
 this.length=0;
 return this;
 },
 first: function() {
 return this[0];
 },
 last: function() {
 return this[this.length - 1];
 },
 compact: function() {
 return this.select(function(value) {
 return value != null;
 });
 },
 flatten: function() {
 return this.inject([], function(array, value) {
 return array.concat(Object.isArray(value) ?
 value.flatten() : [value]);
 });
 },
 without: function() {
 var values=$A(arguments);
 return this.select(function(value) {
 return !values.include(value);
 });
 },
 reverse: function(inline) {
 return (inline !== false ? this : this.toArray())._reverse();
 },
 reduce: function() {
 return this.length > 1 ? this : this[0];
 },
 uniq: function(sorted) {
 return this.inject([], function(array, value, index) {
 if (0==index || (sorted ? array.last() != value : !array.include(value)))
 array.push(value);
 return array;
 });
 },
 intersect: function(array) {
 return this.uniq().findAll(function(item) {
 return array.detect(function(value) { return item === value });
 });
 },
 clone: function() {
 return [].concat(this);
 },
 size: function() {
 return this.length;
 },
 inspect: function() {
 return '[' + this.map(Object.inspect).join(', ') + ']';
 },
 toJSON: function() {
 var results=[];
 this.each(function(object) {
 var value=Object.toJSON(object);
 if (value !== undefined) results.push(value);
 });
 return '[' + results.join(', ') + ']';
 }
});
if (Object.isFunction(Array.prototype.forEach))
 Array.prototype._each=Array.prototype.forEach;
if (!Array.prototype.indexOf) Array.prototype.indexOf=function(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;
};
if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf=function(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;
};
Array.prototype.toArray=Array.prototype.clone;
function $w(string) {
 if (!Object.isString(string)) return [];
 string=string.strip();
 return string ? string.split(/\s+/) : [];
}
if (Prototype.Browser.Opera){
 Array.prototype.concat=function() {
 var array=[];
 for (var i=0, length=this.length; i < length; i++) array.push(this[i]);
 for (var i=0, length=arguments.length; i < length; i++) {
 if (Object.isArray(arguments[i])) {
 for (var j=0, arrayLength=arguments[i].length; j < arrayLength; j++)
  array.push(arguments[i][j]);
 } else {
 array.push(arguments[i]);
 }
 }
 return array;
 };
}
Object.extend(Number.prototype, {
 toColorPart: function() {
 return this.toPaddedString(2, 16);
 },
 succ: function() {
 return this + 1;
 },
 times: function(iterator) {
 $R(0, this, true).each(iterator);
 return this;
 },
 toPaddedString: function(length, radix) {
 var string=this.toString(radix || 10);
 return '0'.times(length - string.length) + string;
 },
 toJSON: function() {
 return isFinite(this) ? this.toString() : 'null';
 }
});
$w('abs round ceil floor').each(function(method){
 Number.prototype[method]=Math[method].methodize();
});
function $H(object) {
 return new Hash(object);
};
var Hash=Class.create(Enumerable, (function() {
 if (function() {
 var i=0, Test=function(value) { this.key=value };
 Test.prototype.key='foo';
 for (var property in new Test('bar')) i++;
 return i > 1;
 }()) {
 function each(iterator) {
 var cache=[];
 for (var key in this._object) {
 var value=this._object[key];
 if (cache.include(key)) continue;
 cache.push(key);
 var pair=[key, value];
 pair.key=key;
 pair.value=value;
 iterator(pair);
 }
 }
 } else {
 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 toQueryPair(key, value) {
 if (Object.isUndefined(value)) return key;
 return key + '=' + encodeURIComponent(String.interpret(value));
 }
 return {
 initialize: function(object) {
 this._object=Object.isHash(object) ? object.toObject() : Object.clone(object);
 },
 _each: each,
 set: function(key, value) {
 return this._object[key]=value;
 },
 get: function(key) {
 return this._object[key];
 },
 unset: function(key) {
 var value=this._object[key];
 delete this._object[key];
 return value;
 },
 toObject: function() {
 return Object.clone(this._object);
 },
 keys: function() {
 return this.pluck('key');
 },
 values: function() {
 return this.pluck('value');
 },
 index: function(value) {
 var match=this.detect(function(pair) {
 return pair.value === value;
 });
 return match && match.key;
 },
 merge: function(object) {
 return this.clone().update(object);
 },
 update: function(object) {
 return new Hash(object).inject(this, function(result, pair) {
 result.set(pair.key, pair.value);
 return result;
 });
 },
 toQueryString: function() {
 return this.map(function(pair) {
 var key=encodeURIComponent(pair.key), values=pair.value;
 if (values && typeof values=='object') {
  if (Object.isArray(values))
  return values.map(toQueryPair.curry(key)).join('&');
 }
 return toQueryPair(key, values);
 }).join('&');
 },
 inspect: function() {
 return '#<Hash:{' + this.map(function(pair) {
 return pair.map(Object.inspect).join(': ');
 }).join(', ') + '}>';
 },
 toJSON: function() {
 return Object.toJSON(this.toObject());
 },
 clone: function() {
 return new Hash(this);
 }
 }
})());
Hash.prototype.toTemplateReplacements=Hash.prototype.toObject;
Hash.from=$H;
var ObjectRange=Class.create(Enumerable, {
 initialize: function(start, end, exclusive) {
 this.start=start;
 this.end=end;
 this.exclusive=exclusive;
 },
 _each: function(iterator) {
 var value=this.start;
 while (this.include(value)) {
 iterator(value);
 value=value.succ();
 }
 },
 include: function(value) {
 if (value < this.start)
 return false;
 if (this.exclusive)
 return value < this.end;
 return value <= this.end;
 }
});
var $R=function(start, end, exclusive) {
 return new ObjectRange(start, end, exclusive);
};
var Ajax={
 getTransport: function() {
 return Try.these(
 function() {return new XMLHttpRequest()},
 function() {return new ActiveXObject('Msxml2.XMLHTTP')},
 function() {return new ActiveXObject('Microsoft.XMLHTTP')}
 ) || false;
 },
 activeRequestCount: 0
};
Ajax.Responders={
 responders: [],
 _each: function(iterator) {
 this.responders._each(iterator);
 },
 register: function(responder) {
 if (!this.include(responder))
 this.responders.push(responder);
 },
 unregister: function(responder) {
 this.responders=this.responders.without(responder);
 },
 dispatch: function(callback, request, transport, json) {
 this.each(function(responder) {
 if (Object.isFunction(responder[callback])) {
 try {
  responder[callback].apply(responder, [request, transport, json]);
 } catch (e) { }
 }
 });
 }
};
Object.extend(Ajax.Responders, Enumerable);
Ajax.Responders.register({
 onCreate: function() { Ajax.activeRequestCount++ },
 onComplete: function() { Ajax.activeRequestCount-- }
});
Ajax.Base=Class.create({
 initialize: function(options) {
 this.options={
 method: 'post',
 asynchronous: true,
 contentType: 'application/x-www-form-urlencoded',
 encoding: 'UTF-8',
 parameters: '',
 evalJSON: true,
 evalJS: true
 };
 Object.extend(this.options, options || { });
 this.options.method=this.options.method.toLowerCase();
 if (Object.isString(this.options.parameters))
 this.options.parameters=this.options.parameters.toQueryParams();
 }
});
Ajax.Request=Class.create(Ajax.Base, {
 _complete: false,
 initialize: function($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);
 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 : '');
 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
 $H(extras).each(function(pair) { headers[pair.key]=pair.value });
 }
 for (var name in headers)
 this.transport.setRequestHeader(name, headers[name]);
 },
 success: function() {
 var status=this.getStatus();
 return !status || (status >= 200 && status < 300);
 },
 getStatus: function() {
 try {
 return this.transport.status || 0;
 } catch (e) { return 0 }
 },
 respondToReadyState: function(readyState) {
 var state=Ajax.Request.Events[readyState], response=new Ajax.Response(this);
 if (state=='Complete') {
 try {
 this._complete=true;
 (this.options['on' + response.status]
  || this.options['on' + (this.success() ? 'Success' : 'Failure')]
  || Prototype.emptyFunction)(response, response.headerJSON);
 } catch (e) {
 this.dispatchException(e);
 }
 var contentType=response.getHeader('Content-type');
 if (this.options.evalJS=='force'
  || (this.options.evalJS && contentType
  && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/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;
 }
 },
 getHeader: function(name) {
 try {
 return this.transport.getResponseHeader(name);
 } 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=xml === undefined ? 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);
 } 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')))
 return null;
 try {
 return this.transport.responseText.evalJSON(options.sanitizeJSON);
 } 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=options || { };
 var onComplete=options.onComplete;
 options.onComplete=(function(response, param) {
 this.updateContent(response.responseText);
 if (Object.isFunction(onComplete)) onComplete(response, param);
 }).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);
 }
 if (this.success()) {
 if (this.onComplete) this.onComplete.bind(this).defer();
 }
 }
});
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() {
 var element=this.Element;
 this.Element=function(tagName, attributes) {
 attributes=attributes || { };
 tagName=tagName.toLowerCase();
 var cache=Element.cache;
 if (Prototype.Browser.IE && 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(this.Element, element || { });
}).call(window);
Element.cache={ };
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).style.display='none';
 return element;
 },
 show: function(element) {
 $(element).style.display='';
 return element;
 },
 remove: function(element) {
 element=$(element);
 element.parentNode.removeChild(element);
 return element;
 },
 update: function(element, content) {
 element=$(element);
 if (content && content.toElement) content=content.toElement();
 if (Object.isElement(content)) return element.update().insert(content);
 content=Object.toHTML(content);
 element.innerHTML=content.stripScripts();
 content.evalScripts.bind(content).defer();
 return element;
 },
 replace: function(element, content) {
 element=$(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, t, range;
 for (position in insertions) {
 content=insertions[position];
 position=position.toLowerCase();
 t=Element._insertionTranslations[position];
 if (content && content.toElement) content=content.toElement();
 if (Object.isElement(content)) {
 t.insert(element, content);
 continue;
 }
 content=Object.toHTML(content);
 range=element.ownerDocument.createRange();
 t.initializeRange(element, range);
 t.insert(element, range.createContextualFragment(content.stripScripts()));
 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('parentNode');
 },
 descendants: function(element) {
 return $A($(element).getElementsByTagName('*')).each(Element.extend);
 },

 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('previousSibling');
 },
 nextSiblings: function(element) {
 return $(element).recursivelyCollect('nextSibling');
 },
 siblings: function(element) {
 element=$(element);
 return element.previousSiblings().reverse().concat(element.nextSiblings());
 },
 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 $(element.parentNode);
 var ancestors=element.ancestors();
 return expression ? Selector.findElement(ancestors, expression, index) :
 ancestors[index || 0];
 },
 down: function(element, expression, index) {
 element=$(element);
 if (arguments.length==1) return element.firstDescendant();
 var descendants=element.descendants();
 return expression ? Selector.findElement(descendants, expression, index) :
 descendants[index || 0];
 },
 previous: function(element, expression, index) {
 element=$(element);
 if (arguments.length==1) return $(Selector.handlers.previousElementSibling(element));
 var previousSiblings=element.previousSiblings();
 return expression ? Selector.findElement(previousSiblings, expression, index) :
 previousSiblings[index || 0];
 },
 next: function(element, expression, index) {
 element=$(element);
 if (arguments.length==1) return $(Selector.handlers.nextElementSibling(element));
 var nextSiblings=element.nextSiblings();
 return expression ? Selector.findElement(nextSiblings, expression, index) :
 nextSiblings[index || 0];
 },
 select: function() {
 var args=$A(arguments), element=$(args.shift());
 return Selector.findChildElements(element, args);
 },
 adjacent: function() {
 var args=$A(arguments), element=$(args.shift());
 return Selector.findChildElements(element.parentNode, args).without(element);
 },
 identify: function(element) {
 element=$(element);
 var id=element.readAttribute('id'), self=arguments.callee;
 if (id) return id;
 do { id='anonymous_element_' + self.counter++ } while ($(id));
 element.writeAttribute('id', id);
 return id;
 },
 readAttribute: function(element, name) {
 element=$(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]=value === undefined ? true : value;
 for (var attr in attributes) {
 var 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().height;
 },

 getWidth: function(element) {
 return $(element).getDimensions().width;
 },
 classNames: function(element) {
 return new Element.ClassNames(element);
 },
 hasClassName: function(element, className) {
 if (!(element=$(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(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=$(element))) return;
 return element[element.hasClassName(className) ?
 'removeClassName' : 'addClassName'](className);
 },
 cleanWhitespace: function(element) {
 element=$(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=$(ancestor);
 if (element.compareDocumentPosition)
 return (element.compareDocumentPosition(ancestor) & 8) === 8;
 if (element.sourceIndex && !Prototype.Browser.Opera) {
 var e=element.sourceIndex, a=ancestor.sourceIndex,
 nextAncestor=ancestor.nextSibling;
 if (!nextAncestor) {
 do { ancestor=ancestor.parentNode; }
 while (!(nextAncestor=ancestor.nextSibling) && ancestor.parentNode);
 }
 if (nextAncestor) return (e > a && e < nextAncestor.sourceIndex);
 }
 while (element=element.parentNode)
 if (element==ancestor) return true;
 return false;
 },
 scrollTo: function(element) {
 element=$(element);
 var pos=element.cumulativeOffset();
 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) {
 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') ?
  (elementStyle.styleFloat === undefined ? '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=$(element).getStyle('display');
 if (display != 'none' && display != null) // Safari bug
 return {width: element.offsetWidth, height: element.offsetHeight};
 var els=element.style;
 var originalVisibility=els.visibility;
 var originalPosition=els.position;
 var originalDisplay=els.display;
 els.visibility='hidden';
 els.position='absolute';
 els.display='block';
 var originalWidth=element.clientWidth;
 var originalHeight=element.clientHeight;
 els.display=originalDisplay;
 els.position=originalPosition;
 els.visibility=originalVisibility;
 return {width: originalWidth, height: originalHeight};
 },
 makePositioned: function(element) {
 element=$(element);
 var pos=Element.getStyle(element, 'position');
 if (pos=='static' || !pos) {
 element._madePositioned=true;
 element.style.position='relative';
 if (window.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=$(element);
 if (!element._overflow) return element;
 element.style.overflow=element._overflow=='auto' ? '' : element._overflow;
 element._overflow=null;
 return element;
 },
 cumulativeOffset: function(element) {
 var valueT=0, valueL=0;
 do {
 valueT += element.offsetTop || 0;
 valueL += element.offsetLeft || 0;
 element=element.offsetParent;
 } while (element);
 return Element._returnOffset(valueL, valueT);
 },
 positionedOffset: function(element) {
 var valueT=0, valueL=0;
 do {
 valueT += element.offsetTop || 0;
 valueL += element.offsetLeft || 0;
 element=element.offsetParent;
 if (element) {
 if (element.tagName=='BODY') break;
 var p=Element.getStyle(element, 'position');
 if (p=='relative' || p=='absolute') break;
 }
 } while (element);
 return Element._returnOffset(valueL, valueT);
 },
 absolutize: function(element) {
 element=$(element);
 if (element.getStyle('position')=='absolute') return;
 var offsets=element.positionedOffset();
 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('position')=='relative') return;
 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 $(document.body);
 },
 viewportOffset: function(forElement) {
 var valueT=0, valueL=0;
 var element=forElement;
 do {
 valueT += element.offsetTop || 0;
 valueL += element.offsetLeft || 0;
 if (element.offsetParent==document.body &&
 Element.getStyle(element, 'position')=='absolute') break;
 } while (element=element.offsetParent);
 element=forElement;
 do {
 if (!Prototype.Browser.Opera || element.tagName=='BODY') {
 valueT -= element.scrollTop || 0;
 valueL -= element.scrollLeft || 0;
 }
 } while (element=element.parentNode);
 return Element._returnOffset(valueL, valueT);
 },
 clonePosition: function(element, source) {
 var options=Object.extend({
 setLeft: true,
 setTop: true,
 setWidth: true,
 setHeight: true,
 offsetTop: 0,
 offsetLeft: 0
 }, arguments[2] || { });
 source=$(source);
 var p=source.viewportOffset();
 element=$(element);
 var delta=[0, 0];
 var parent=null;
 if (Element.getStyle(element, 'position')=='absolute') {
 parent=element.getOffsetParent();
 delta=parent.viewportOffset();
 }
 if (parent==document.body) {
 delta[0] -= document.body.offsetLeft;
 delta[1] -= document.body.offsetTop;
 }
 if (options.setLeft) element.style.left=(p[0] - delta[0] + options.offsetLeft) + 'px';
 if (options.setTop) element.style.top=(p[1] - delta[1] + options.offsetTop) + 'px';
 if (options.setWidth) element.style.width=source.offsetWidth + 'px';
 if (options.setHeight) element.style.height=source.offsetHeight + 'px';
 return element;
 }
};
Element.Methods.identify.counter=1;
Object.extend(Element.Methods, {
 getElementsBySelector: Element.Methods.select,
 childElements: Element.Methods.immediateDescendants
});
Element._attributeTranslations={
 write: {
 names: {
 className: 'class',
 htmlFor: 'for'
 },
 values: { }
 }
};
if (!document.createRange || Prototype.Browser.Opera) {
 Element.Methods.insert=function(element, insertions) {
 element=$(element);
 if (Object.isString(insertions) || Object.isNumber(insertions) ||
 Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
  insertions={ bottom: insertions };
 var t=Element._insertionTranslations, content, position, pos, tagName;
 for (position in insertions) {
 content=insertions[position];
 position=position.toLowerCase();
 pos=t[position];
 if (content && content.toElement) content=content.toElement();
 if (Object.isElement(content)) {
 pos.insert(element, content);
 continue;
 }
 content=Object.toHTML(content);
 tagName=((position=='before' || position=='after')
 ? element.parentNode : element).tagName.toUpperCase();
 if (t.tags[tagName]) {
 var fragments=Element._getContentFromAnonymousElement(tagName, content.stripScripts());
 if (position=='top' || position=='after') fragments.reverse();
 fragments.each(pos.insert.curry(element));
 }
 else element.insertAdjacentHTML(pos.adjacency, content.stripScripts());
 content.evalScripts.bind(content).defer();
 }
 return element;
 };
}
if (Prototype.Browser.Opera) {
 Element.Methods._getStyle=Element.Methods.getStyle;
 Element.Methods.getStyle=function(element, style) {
 switch(style) {
 case 'left':
 case 'top':
 case 'right':
 case 'bottom':
 if (Element._getStyle(element, 'position')=='static') return null;
 default: return Element._getStyle(element, style);
 }
 };
 Element.Methods._readAttribute=Element.Methods.readAttribute;
 Element.Methods.readAttribute=function(element, attribute) {
 if (attribute=='title') return element.title;
 return Element._readAttribute(element, attribute);
 };
}
else if (Prototype.Browser.IE) {
 $w('positionedOffset getOffsetParent viewportOffset').each(function(method) {
 Element.Methods[method]=Element.Methods[method].wrap(
 function(proceed, element) {
 element=$(element);
 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;
 }
 );
 });
 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={
 read: {
 names: {
 'class': 'className',
 'for': 'htmlFor'
 },
 values: {
 _getAttr: function(element, attribute) {
  return element.getAttribute(attribute, 2);
 },
 _getAttrNode: function(element, attribute) {
  var node=element.getAttributeNode(attribute);
  return node ? node.value : "";
 },
 _getEv: function(element, attribute) {
  var attribute=element.getAttribute(attribute);
  return attribute ? attribute.toString().slice(23, -2) : null;
 },
 _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.clone(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').each(function(attr) {
 Element._attributeTranslations.write.names[attr.toLowerCase()]=attr;
 Element._attributeTranslations.has[attr.toLowerCase()]=attr;
 });

 (function(v) {
 Object.extend(v, {
 href: v._getAttr,
 src:  v._getAttr,
 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);
}

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=='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 (Prototype.Browser.IE || Prototype.Browser.Opera) {
 Element.Methods.update=function(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 in Element._insertionTranslations.tags) {
 $A(element.childNodes).each(function(node) { element.removeChild(node) });
 Element._getContentFromAnonymousElement(tagName, content.stripScripts())
 .each(function(node) { element.appendChild(node) });
 }
 else element.innerHTML=content.stripScripts();
 content.evalScripts.bind(content).defer();
 return element;
 };
}
if (document.createElement('div').outerHTML) {
 Element.Methods.replace=function(element, content) {
 element=$(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];
 div.innerHTML=t[0] + html + t[1];
 t[2].times(function() { div=div.firstChild });
 return $A(div.childNodes);
};
Element._insertionTranslations={
 before: {
 adjacency: 'beforeBegin',
 insert: function(element, node) {
 element.parentNode.insertBefore(node, element);
 },
 initializeRange: function(element, range) {
 range.setStartBefore(element);
 }
 },
 top: {
 adjacency: 'afterBegin',
 insert: function(element, node) {
 element.insertBefore(node, element.firstChild);
 },
 initializeRange: function(element, range) {
 range.selectNodeContents(element);
 range.collapse(true);
 }
 },
 bottom: {
 adjacency: 'beforeEnd',
 insert: function(element, node) {
 element.appendChild(node);
 }
 },
 after: {
 adjacency: 'afterEnd',
 insert: function(element, node) {
 element.parentNode.insertBefore(node, element.nextSibling);
 },
 initializeRange: function(element, range) {
 range.setStartAfter(element);
 }
 },
 tags: {
 TABLE: ['<table>',  '</table>',   1],
 TBODY: ['<table><tbody>',  '</tbody></table>',  2],
 TR: ['<table><tbody><tr>', '</tr></tbody></table>', 3],
 TD: ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
 SELECT: ['<select>',  '</select>',   1]
 }
};
(function() {
 this.bottom.initializeRange=this.top.initializeRange;
 Object.extend(this.tags, {
 THEAD: this.tags.TBODY,
 TFOOT: this.tags.TBODY,
 TH: this.tags.TD
 });
}).call(Element._insertionTranslations);
Element.Methods.Simulated={
 hasAttribute: function(element, attribute) {
 attribute=Element._attributeTranslations.has[attribute] || attribute;
 var node=$(element).getAttributeNode(attribute);
 return node && node.specified;
 }
};
Element.Methods.ByTag={ };
Object.extend(Element, Element.Methods);
if (!Prototype.BrowserFeatures.ElementExtensions &&
 document.createElement('div').__proto__) {
 window.HTMLElement={ };
 window.HTMLElement.prototype=document.createElement('div').__proto__;
 Prototype.BrowserFeatures.ElementExtensions=true;
}
Element.extend=(function() {
 if (Prototype.BrowserFeatures.SpecificElementExtensions)
 return Prototype.K;
 var Methods={ }, ByTag=Element.Methods.ByTag;
 var extend=Object.extend(function(element) {
 if (!element || element._extendedByPrototype ||
 element.nodeType != 1 || element==window) return element;
 var methods=Object.clone(Methods),
 tagName=element.tagName, property, value;
 if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
 for (property in methods) {
 value=methods[property];
 if (Object.isFunction(value) && !(property in element))
 element[property]=value.methodize();
 }
 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];
 window[klass]={ };
 window[klass].prototype=document.createElement(tagName).__proto__;
 return window[klass];
 }
 if (F.ElementExtensions) {
 copy(Element.Methods, HTMLElement.prototype);
 copy(Element.Methods.Simulated, HTMLElement.prototype, 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() {
 var dimensions={ };
 $w('width height').each(function(d) {
 var D=d.capitalize();
 dimensions[d]=self['inner' + D] ||
 (document.documentElement['client' + D] || document.body['client' + D]);
 });
 return dimensions;
 },

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

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

 getScrollOffsets: function() {
 return Element._returnOffset(
 window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
 window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
 }
};
var Selector=Class.create({
 initialize: function(expression) {
 this.expression=expression.strip();
 this.compileMatcher();
 },
 compileMatcher: function() {
 if (Prototype.BrowserFeatures.XPath && !(/(\[[\w-]*?:|:checked)/).test(this.expression))
 return this.compileXPathMatcher();
 var e=this.expression, ps=Selector.patterns, h=Selector.handlers,
 c=Selector.criteria, le, p, m;
 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 in ps) {
 p=ps[i];
 if (m=e.match(p)) {
  this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
 	 new Template(c[i]).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;
 if (Selector._cache[e]) {
 this.xpath=Selector._cache[e]; return;
 }
 this.matcher=['.//*'];
 while (e && le != e && (/\S/).test(e)) {
 le=e;
 for (var i in ps) {
 if (m=e.match(ps[i])) {
  this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
  new Template(x[i]).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;
 if (this.xpath) return document._getElementsByXPath(this.xpath, root);
 return this.matcher(root);
 },

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

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

 while (e && le !== e && (/\S/).test(e)) {
 le=e;
 for (var i in ps) {
 p=ps[i];
 if (m=e.match(p)) {
  if (as[i]) {
  this.tokens.push([i, 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() + ">";
 }
});
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: "[@#{1}]",
 attr: function(m) {
 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 or translate(text(), ' \t\r\n', '')='')]",
 'checked': "[@checked]",
 'disabled': "[@disabled]",
 'enabled': "[not(@disabled)]",
 'not': function(m) {
 var e=m[6], p=Selector.patterns,
  x=Selector.xpath, le, m, v;

 var exclusion=[];
 while (e && le != e && (/\S/).test(e)) {
  le=e;
  for (var i in p) {
  if (m=e.match(p[i])) {
  v=Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).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=false;',
 attr: function(m) {
 m[3]=(m[5] || m[6]);
 return new Template('n=h.attr(n, r, "#{1}", "#{3}", "#{2}"); 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: {
 // combinators must be listed first
 // (and descendant needs to be last combinator)
 laterSibling: /^\s*~\s*/,
 child: /^\s*>\s*/,
 adjacent: /^\s*\+\s*/,
 descendant: /^\s/,

 // selectors follow
 tagName: /^\s*(\*|[\w\-]+)(\b|$)?/,
 id:  /^#([\w\-\*]+)(\b|$)/,
 className: /^\.([\w\-\*]+)(\b|$)/,
 pseudo: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s)|(?=:))/,
 attrPresence: /^\[([\w]+)\]/,
 attr:  /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
 },
 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 Selector.operators[matches[2]](nodeValue, matches[3]);
 }
 },

 handlers: {
 concat: function(a, b) {
 for (var i=0, node; node=b[i]; i++)
 a.push(node);
 return a;
 },
 mark: function(nodes) {
 for (var i=0, node; node=nodes[i]; i++)
 node._counted=true;
 return nodes;
 },
 unmark: function(nodes) {
 for (var i=0, node; node=nodes[i]; i++)
 node._counted=undefined;
 return nodes;
 },
 index: function(parentNode, reverse, ofType) {
 parentNode._counted=true;
 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._counted)) node.nodeIndex=j++;
 }
 } else {
 for (var i=0, j=1, nodes=parentNode.childNodes; node=nodes[i]; i++)
  if (node.nodeType==1 && (!ofType || node._counted)) 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 (!(n=nodes[i])._counted) {
  n._counted=true;
  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, children=[], 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) {
 tagName=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()==tagName) results.push(node);
 return results;
 } else return root.getElementsByTagName(tagName);
 },

 id: function(nodes, root, id, combinator) {
 var targetNode=$(id), h=Selector.handlers;
 if (!targetNode) return [];
 if (!nodes && root==document) return [targetNode];
 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) {
 if (!nodes) nodes=root.getElementsByTagName("*");
 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) {
 if (!nodes) nodes=root.getElementsByTagName("*");
 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 $R(1, total).inject([], function(memo, i) {
 if (0==(i - b) % a && (i - b) / a >= 0) memo.push(i);
 return memo;
 });
 },
 nth: function(nodes, formula, root, reverse, ofType) {
 if (nodes.length==0) return [];
 if (formula=='even') formula='2n+0';
 if (formula=='odd') formula='2n+1';
 var h=Selector.handlers, results=[], indexed=[], m;
 h.mark(nodes);
 for (var i=0, node; node=nodes[i]; i++) {
 if (!node.parentNode._counted) {
  h.index(node.parentNode, reverse, ofType);
  indexed.push(node.parentNode);
 }
 }
 if (formula.match(/^\d+$/)) { 
 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+))?/)) { 
 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 && !node.innerHTML.match(/^\s*$/))) continue;
 results.push(node);
 }
 return results;
 },
 'not': function(nodes, selector, root) {
 var h=Selector.handlers, selectorType, m;
 var exclusions=new Selector(selector).findElements(root);
 h.mark(exclusions);
 for (var i=0, results=[], node; node=nodes[i]; i++)
 if (!node._counted) results.push(node);
 h.unmark(exclusions);
 return results;
 },
 'enabled': function(nodes, value, root) {
 for (var i=0, results=[], node; node=nodes[i]; i++)
 if (!node.disabled) results.push(node);
 return results;
 },
 'disabled': function(nodes, value, root) {
 for (var i=0, results=[], node; node=nodes[i]; i++)
 if (node.disabled) results.push(node);
 return results;
 },
 'checked': function(nodes, value, root) {
 for (var i=0, results=[], node; node=nodes[i]; i++)
 if (node.checked) results.push(node);
 return results;
 }
 },
 operators: {
 '=': function(nv, v) { return nv==v; },
 '!=': function(nv, v) { return nv != v; },
 '^=': function(nv, v) { return nv.startsWith(v); },
 '$=': function(nv, v) { return nv.endsWith(v); },
 '*=': function(nv, v) { return nv.include(v); },
 '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
 '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
 },
 matchElements: function(elements, expression) {
 var matches=new Selector(expression).findElements(), h=Selector.handlers;
 h.mark(matches);
 for (var i=0, results=[], element; element=elements[i]; i++)
 if (element._counted) 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) {
 var exprs=expressions.join(','), expressions=[];
 exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
 expressions.push(m[1].strip());
 });
 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;
 }
});
function $$() {
 return Selector.findChildElements(document, $A(arguments));
}
var Form={
 reset: function(form) {
 $(form).reset();
 return form;
 },
 serializeElements: function(elements, options) {
 if (typeof options != 'object') options={ hash: !!options };
 else if (options.hash === undefined) 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 != '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) {
 return $A($(form).getElementsByTagName('*')).inject([],
 function(elements, child) {
 if (Form.Element.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'].include(element.tagName.toLowerCase());
 });
 },

 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'].include(element.type)))
 element.select();
 } catch (e) { }
 return element;
 },

 disable: function(element) {
 element=$(element);
 element.blur();
 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 (value === undefined) return element.checked ? element.value : null;
 else element.checked=!!value;
 },

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

 select: function(element, index) {
 if (index === undefined)
 return this[element.type=='select-one' ?
 'selectOne' : 'selectMany'](element);
 else {
 var opt, value, single=!Object.isArray(index);
 for (var i=0, length=element.length; i < length; i++) {
 opt=element.options[i];
 value=this.optionValue(opt);
 if (single) {
  if (value==index) {
  opt.selected=true;
  return;
  }
 }
 else opt.selected=index.include(value);
 }
 }
 },

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

Object.extend(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: { },

 relatedTarget: function(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);
 }
});

Event.Methods=(function() {
 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);
 };
 }

 return {
 isLeftClick: function(event) { return isButton(event, 0) },
 isMiddleClick: function(event) { return isButton(event, 1) },
 isRightClick: function(event) { return isButton(event, 2) },

 element: function(event) {
 var node=Event.extend(event).target;
 return Element.extend(node.nodeType==Node.TEXT_NODE ? node.parentNode : node);
 },

 findElement: function(event, expression) {
 var element=Event.element(event);
 return element.match(expression) ? element : element.up(expression);
 },

 pointer: function(event) {
 return {
 x: event.pageX || (event.clientX +
  (document.documentElement.scrollLeft || document.body.scrollLeft)),
 y: event.pageY || (event.clientY +
  (document.documentElement.scrollTop || document.body.scrollTop))
 };
 },

 pointerX: function(event) { return Event.pointer(event).x },
 pointerY: function(event) { return Event.pointer(event).y },

 stop: function(event) {
 Event.extend(event);
 event.preventDefault();
 event.stopPropagation();
 event.stopped=true;
 }
 };
})();

Event.extend=(function() {
 var methods=Object.keys(Event.Methods).inject({ }, function(m, name) {
 m[name]=Event.Methods[name].methodize();
 return m;
 });

 if (Prototype.Browser.IE) {
 Object.extend(methods, {
 stopPropagation: function() { this.cancelBubble=true },
 preventDefault: function() { this.returnValue=false },
 inspect: function() { return "[object Event]" }
 });

 return function(event) {
 if (!event) return false;
 if (event._extendedByPrototype) return event;

 event._extendedByPrototype=Prototype.emptyFunction;
 var pointer=Event.pointer(event);
 Object.extend(event, {
 target: event.srcElement,
 relatedTarget: Event.relatedTarget(event),
 pageX: pointer.x,
 pageY: pointer.y
 });
 return Object.extend(event, methods);
 };

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

Object.extend(Event, (function() {
 var cache=Event.cache;

 function getEventID(element) {
 if (element._eventID) return element._eventID;
 arguments.callee.id=arguments.callee.id || 1;
 return element._eventID=++arguments.callee.id;
 }

 function getDOMEventName(eventName) {
 if (eventName && eventName.include(':')) return "dataavailable";
 return eventName;
 }

 function getCacheForID(id) {
 return cache[id]=cache[id] || { };
 }

 function getWrappersForEventName(id, eventName) {
 var c=getCacheForID(id);
 return c[eventName]=c[eventName] || [];
 }

 function createWrapper(element, eventName, handler) {
 var id=getEventID(element);
 var c=getWrappersForEventName(id, eventName);
 if (c.pluck("handler").include(handler)) return false;

 var wrapper=function(event) {
 if (!Event || !Event.extend ||
 (event.eventName && event.eventName != eventName))
  return false;

 Event.extend(event);
 handler.call(element, event)
 };

 wrapper.handler=handler;
 c.push(wrapper);
 return wrapper;
 }

 function findWrapper(id, eventName, handler) {
 var c=getWrappersForEventName(id, eventName);
 return c.find(function(wrapper) { return wrapper.handler==handler });
 }

 function destroyWrapper(id, eventName, handler) {
 var c=getCacheForID(id);
 if (!c[eventName]) return false;
 c[eventName]=c[eventName].without(findWrapper(id, eventName, handler));
 }

 function destroyCache() {
 for (var id in cache)
 for (var eventName in cache[id])
 cache[id][eventName]=null;
 }

 if (window.attachEvent) {
 window.attachEvent("onunload", destroyCache);
 }

 return {
 observe: function(element, eventName, handler) {
 element=$(element);
 var name=getDOMEventName(eventName);

 var wrapper=createWrapper(element, eventName, handler);
 if (!wrapper) return element;

 if (element.addEventListener) {
 element.addEventListener(name, wrapper, false);
 } else {
 element.attachEvent("on" + name, wrapper);
 }

 return element;
 },

 stopObserving: function(element, eventName, handler) {
 element=$(element);
 var id=getEventID(element), name=getDOMEventName(eventName);

 if (!handler && eventName) {
 getWrappersForEventName(id, eventName).each(function(wrapper) {
  element.stopObserving(eventName, wrapper.handler);
 });
 return element;

 } else if (!eventName) {
 Object.keys(getCacheForID(id)).each(function(eventName) {
  element.stopObserving(eventName);
 });
 return element;
 }

 var wrapper=findWrapper(id, eventName, handler);
 if (!wrapper) return element;

 if (element.removeEventListener) {
 element.removeEventListener(name, wrapper, false);
 } else {
 element.detachEvent("on" + name, wrapper);
 }

 destroyWrapper(id, eventName, handler);

 return element;
 },

 fire: function(element, eventName, memo) {
 element=$(element);
 if (element==document && document.createEvent && !element.dispatchEvent)
 element=document.documentElement;

 if (document.createEvent) {
 var event=document.createEvent("HTMLEvents");
 event.initEvent("dataavailable", true, true);
 } else {
 var event=document.createEventObject();
 event.eventType="ondataavailable";
 }

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

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

 return event;
 }
 };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
 fire:  Event.fire,
 observe: Event.observe,
 stopObserving: Event.stopObserving
});

Object.extend(document, {
 fire:  Element.Methods.fire.methodize(),
 observe: Element.Methods.observe.methodize(),
 stopObserving: Element.Methods.stopObserving.methodize()
});

(function() {
 var timer, fired=false;
 function fireContentLoadedEvent() {
 if (fired) return;
 if (timer) window.clearInterval(timer);
 document.fire("dom:loaded");
 fired=true;
 }
 if (document.addEventListener) {
 if (Prototype.Browser.WebKit) {
 timer=window.setInterval(function() {
 if (/loaded|complete/.test(document.readyState))
  fireContentLoadedEvent();
 }, 0);

 Event.observe(window, "load", fireContentLoadedEvent);

 } else {
 document.addEventListener("DOMContentLoaded",
 fireContentLoadedEvent, false);
 }
 } else {
 document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
 $("__onDOMContentLoaded").onreadystatechange=function() {
 if (this.readyState=="complete") {
 this.onreadystatechange=null;
 fireContentLoadedEvent();
 }
 };
 }
})();
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);
Element.addMethods();