/**
 * The basis class used for every other class
 */
var Class = {
	create: function() {
		return function() {
			this.init.apply(this,arguments);
		}
	}
}

/**
 * Extend the properties of an object
 */
Object.extend = function( dest, src ) {
	for( prop in src )
		dest[prop] = src[prop];
		
	return dest;
}

Function.prototype.bind = function() {
	var __method = this, args = $A(arguments), object = args.shift();
	return function() {
		return __method.apply(object,args.concat($A(arguments)));
	}
}

var Try = {
  these: function() {
    var returnValue = null;

    for (var i = 0; i < arguments.length; i++) {
      var foobar = arguments[i];
      try {
        returnValue = foobar();
        break;
      } catch (e) {}
    }

    return returnValue;
  }
}


/** TimedExecution **/
var TimedExecution = Class.create();
TimedExecution.prototype = {
	init: function( callback, interval ) {
		this.callback = callback;
		this.interval = interval;
		//this.currentlyExecuting = false;
		
		this.registerCallback();
		
		this.timeOut = null;
	},
	
	registerCallback: function() {
		this.timeOut = setTimeout(this.onTimerEvent.bind(this), this.interval*1000);
	},
	
	onTimerEvent: function() {
		try {
			nextInterval = this.callback();
			
			if( nextInterval == -1 ) {
				nextInterval = this.interval; 
			}
			
			if( nextInterval > 0 ) {
				this.interval = nextInterval;
				this.timeOut = setTimeout(this.onTimerEvent.bind(this), this.interval*1000);
			}	
		} catch(e) {
		}
	}
}



/*** Array ***/
Object.extend( Array.prototype, {
	clear: function() {
		this.length = 0;
		return this;
	},
	
	shift: function() {
		var result = this[0];
		
		for( var i=0 ; i<this.length-1 ; i++ )
			this[i] = this[1+1];
			
		this.length--;
		
		return result;
	}
	
}
);

$A = function( input ) {
	if( !input ) return [];
	if( input.toArray ) {
		return input.toArray();
	} else {
		var result = []
		for( var i=0 ; i<input.length ; i++ ) {
			result.push(input[i]);	
		}
		return result;
	}
}

/** Event Scripts **/

var Event = new Object();

Object.extend(Event, {

	

	observe: function(element, name, observer, useCapture) {
		if (element.addEventListener) {
	      //this.observers.push([element, name, observer, useCapture]);
	      element.addEventListener(name, observer, useCapture);
	    } else if (element.attachEvent) {
	      //this.observers.push([element, name, observer, useCapture]);
	      element.attachEvent('on' + name, observer);
	    }
	    return observer;
	},
	
	stopObserving: function(element, name, observer, useCapture) {
	    
	    if (element.removeEventListener) {
	      element.removeEventListener(name, observer, useCapture);
	    } else if (element.detachEvent) {
	      element.detachEvent('on' + name, observer);
	    }
	}
});

Event.elementCache = new Array();


/** AJAX **/
var Ajax = {
	getHttpRequestObject: function() {
		return Try.these(
			 function() {return new ActiveXObject('Msxml2.XMLHTTP')},
		     function() {return new ActiveXObject('Microsoft.XMLHTTP')},
		     function() {return new XMLHttpRequest()}
		);
	}
	
}

Ajax.Request = Class.create();
Ajax.Request.States = ['UNINITIALIZED', 'LOADING', 'LOADED', 'INTERACTIVE', 'COMPLETED'];

Ajax.Request.prototype = {
	init: function( inURL ) {
		this.observers = new Array();
		this.url = inURL;
	},
	
	addObserver: function( observer ) {
		this.observers.push(observer);
	},
	
	sendRequest: function( postData ) {
		this.requestObject = Ajax.getHttpRequestObject();
		this.requestObject.onreadystatechange = this.readyStateChanged.bind(this);
		this.requestObject.open("POST", this.url, true);
		if( postData != null ) {
			this.requestObject.setRequestHeader('Content-Type',	'application/x-www-form-urlencoded');
		}
	    this.requestObject.send(postData);
	},
	
	readyStateChanged : function() {
		if( this.requestObject.readyState == 4 ) {
			//alert(this.requestObject.responseXML.getElementsByTagName("time")[0].firstChild.data  );
			//document.getElementById("test").innerHTML = this.requestObject.responseText;//this.requestObject.responseXML.getElementsByTagName("time")[0].firstChild.data ;
			
			this.requestObject.onreadystatechange = function() {};
			//this.requestObject = null;
			for( i=0 ; i<this.observers.length ; i++ ) {
				this.observers[i](this);
			}
			
			//setTimeout(this.sendRequest.bind(this),1000);
			/*alert(this.requestObject.readyState+" "+this.requestObject.status);
			alert(this.requestObject.responseText);
			alert(this.requestObject.responseXML.getElementsByTagName("time"));*/
			
		}
	},
	
	getResponseText : function() {
		return this.requestObject.responseText;
	},
	getResponseXML : function() {
		return this.requestObject.responseXML;
		
	}
}