var Class = {  create: function() {    return function() {       this.initialize.apply(this, arguments);    }  }}var Abstract = new Object();Object.extend = function(destination, source) {  for (property in source) {    destination[property] = source[property];  }  return destination;}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;  }}Function.prototype.bind = function() {  var __method = this, args = $A(arguments), object = args.shift();  return function() {    return __method.apply(object, args.concat($A(arguments)));  }}Function.prototype.bindAsEventListener = function(object) {  var __method = this;  return function(event) {    return __method.call(object, event || window.event);  }}Object.extend(Number.prototype, {  toColorPart: function() {    var digits = this.toString(16);    if (this < 16) return '0' + digits;    return digits;  },  succ: function() {    return this + 1;  },    times: function(iterator) {    $R(0, this, true).each(iterator);    return this;  }});var Try = {  these: function() {    var returnValue;    for (var i = 0; i < arguments.length; i++) {      var lambda = arguments[i];      try {        returnValue = lambda();        break;      } catch (e) {}    }    return returnValue;  }}/*--------------------------------------------------------------------------*/var PeriodicalExecuter = Class.create();PeriodicalExecuter.prototype = {  initialize: function(callback, frequency) {    this.callback = callback;    this.frequency = frequency;    this.currentlyExecuting = false;    this.registerCallback();  },  registerCallback: function() {    setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);  },  onTimerEvent: function() {    if (!this.currentlyExecuting) {      try {         this.currentlyExecuting = true;        this.callback();       } finally {         this.currentlyExecuting = false;      }    }  }}/*--------------------------------------------------------------------------*/function $() {  var elements = new Array();  for (var i = 0; i < arguments.length; i++) {    var element = arguments[i];    if (typeof element == 'string')      element = document.getElementById(element);    if (arguments.length == 1)       return element;    elements.push(element);  }  return elements;}