var Abstract = new Object();

Object.prototype.extend1 = function(object) {
  for (property in object) {
    this[property] = object[property];
  }
  return this;
}

Function.prototype.bind1 = function(object) {
  var method = this;
  return function() {
    method.apply(object, arguments);
  }
}

Function.prototype.bindAsEventListener = function(object) {
  var method = this;
  return function(event) {
    method.call(object, event || window.event);
  }
}

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() {
    setTimeout(this.onTimerEvent.bind1(this), this.frequency * 1000);
  },
  
  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try { 
        this.currentlyExecuting = true;
        this.callback(); 
      } finally { 
        this.currentlyExecuting = false;
      }
    }
    
    this.registerCallback();
  }
}


//--------------------------------------string-----------------------------------------

String.prototype.lTrim = function () {return this.replace(/^\s*/, "");}
String.prototype.rTrim = function () {return this.replace(/\s*$/, "");}
String.prototype.trim = function () {return this.rTrim().lTrim();}
String.prototype.endsWith = function(sEnd) {return (this.substr(this.length-sEnd.length)==sEnd);}
String.prototype.startsWith = function(sStart) {return (this.substr(0,sStart.length)==sStart);}
String.prototype.format = function()
{ var s = this; for (var i=0; i < arguments.length; i++)
{ s = s.replace("{" + (i) + "}", arguments[i]);}
return(s);}
String.prototype.removeSpaces = function()
{ return this.replace(/ /gi,'');}
String.prototype.removeExtraSpaces = function()
{ return(this.replace(String.prototype.removeExtraSpaces.re, " "));}
String.prototype.removeExtraSpaces.re = new RegExp("\\s+", "g"); String.prototype.removeSpaceDelimitedString = function(r)
{ var s = " " + this.trim() + " "; return s.replace(" " + r,"").rTrim();}
String.prototype.isEmpty = function() {return this.length==0;}; String.prototype.validateURL = function()
{ var urlRegX = /[^a-zA-Z0-9-]/g; return sURL.match(urlRegX, "");}
String.prototype.isEmail = function()
{ var emailReg = /^\w+([-.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/; return emailReg.test(this);}
String.prototype.isAlphaNumeric = function()
{ var alphaReg = /[^a-zA-Z0-9]/g; return !alphaReg.test(this);}
String.prototype.encodeURI = function()
{ var returnString; returnString = escape( this )
returnString = returnString.replace(/\+/g,"%2B"); return returnString
}
String.prototype.decodeURI = function() {return unescape(this)}

//--------------------------------------Array-----------------------------------------

Array.prototype.indexOf = function(p_var)
{ 
    for (var i=0; i<this.length; i++)
    { 
        if (this[i] == p_var)
        { 
            return(i);
        }
    }
    return(-1);
}
Array.prototype.exists = function(p_var) {return(this.indexOf(p_var) != -1);}
Array.prototype.queue = function(p_var) {this.push(p_var)}
Array.prototype.dequeue = function() {return(this.shift());}
Array.prototype.removeAt = function(p_iIndex) {return this.splice(p_iIndex, 1);}
Array.prototy