function GetAjaxHandler()
{ 
	//Use default (XMLHttpRequest) handler if exists
	if (typeof XMLHttpRequest != "undefined") 
	{ 
		return new XMLHttpRequest();
	}
	
	//Else use ActiveX object - Listed from newest to oldest
	var ActiveX_Handlers = [
			"Msxml2.XMLHTTP.7.0", 
			"Msxml2.XMLHTTP.6.0", 
			"Msxml2.XMLHTTP.5.0", 
			"Msxml2.XMLHTTP.4.0", 
			"MSXML2.XMLHTTP.3.0", 
			"MSXML2.XMLHTTP", 
			"Microsoft.XMLHTTP"
		];
	
	for(var i=0; i<=ActiveX_Handlers.length; i++)
	{
		try 
		{
			ActiveX = new ActiveXObject(ActiveX_Handlers[i]);
			if(ActiveX)
			{
				return (ActiveX);
			}
		} 
		catch(e) { }; 
	} 
	
	//Could not find proper Ajax (XML/HTTP) handler
	return false;
}



function SetTimer(Handler) 
{
	var LocalHandler = LocalHandler;
	function timerSet() {
		if (LocalHandler.Bust){LocalHandler.abortRequest(LocalHandler);}
	}
	LocalHandler.timeoutID = window.setTimeout(timerSet, LocalHandler.Timeout);
}










function XMLHTTPPackage(Name, URL, Method, Data)
{
	this.Initialize (Name, URL, Method, Data)
};




XMLHTTPPackage.prototype = {
	Name: null,
	URL: null,
	Data: null,
	Method: null,
	
	Busy: false,
	Cancelled: false,
	
	Timeout: -1,
	TimeoutID: null,
	
	XMLHTTPHandler: null,    
	
	ReturnHandler: null,


//Functions    

	Initialize: function(Name, URL, Method, Data) 
	{
		this.Name = Name;
		this.URL = URL;
		this.Data = Data;
		this.Method="GET"; if (Method=="POST") {this.Method="POST"};

		this.XMLHTTPHandler = GetAjaxHandler();
	},

    
	setTimeout: function(time) {
		this.Timeout = time;
	},



	Execute: function (Handler) 
	{
		if (this.Busy) {throw "Already contacting server";};
		
        var LocalCopy = this;

		if (Handler==null) {Handler=this;}
		this.ReturnHandler = Handler;
		
		this.Busy = true;
		this.Cancelled = false;
		
		if (this.Method == "GET") {
			this.XMLHTTPHandler.open('GET',this.URL,true);
		} 
		else
		{
			this.XMLHTTPHandler.open("POST", this.URL, true);
			this.XMLHTTPHandler.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=ISO-8859-1");
		}
       
		this.XMLHTTPHandler.onreadystatechange = function() {
			LocalCopy.stateChange_Handler(LocalCopy);
		}

		this.XMLHTTPHandler.send(this.Data);

		if (this.Timeout > 0) {
			SetTimer(this);
		}
	},



	stateChange_Handler: function(Handler) {
		switch (Handler.XMLHTTPHandler.readyState) 
        {
            
			case 1:
				try {
					if (!Handler.Cancelled) {
						Handler.ReturnHandler.onInit();
					}
				}
				catch (e)
				{}
			break;


			case 2:
				try {
					if (Handler.XMLHTTPHandler.status != 200)
					{
						if (!Handler.Cancelled) 
						{
							window.status="Error - Call failed";
							Handler.ReturnHandler.onError(
								Handler.XMLHTTPHandler.status,
								Handler.XMLHTTPHandler.statusText,
								Handler
								);
						}

						Handler.XMLHTTPHandler.abort();
						Handler.Busy = false;
					}
                }
                catch (e)
                {}
            break;


			case 3:
				var contentLength;
				try {
					try {
						contentLength = Handler.XMLHTTPHandler.getResponseHeader("Content-Length");
					} 
					catch (e) 
					{
						contentLength = NaN;
					}

					if (!Handler.Cancelled) {
						window.status="Checking...";
						Handler.ReturnHandler.onProgress(
							Handler.XMLHTTPHandler.responseText,
							contentLength
					    );
					}

                }
                catch (e)
                {}
            break;


			case 4:
				try {
					if (Handler.timeoutID) {
						window.clearTimeout(Handler.timeoutID);
						Handler.timeoutID = null;
					}
			        
					if (Handler.Busy) {
						Handler.Busy = false;
						if (!Handler.Cancelled) {
							window.status="Done";
							Handler.ReturnHandler.onLoad(Handler);
						}
					}
				} 
				catch (e) 
				{
				}
				finally 
				{
					Handler.Busy = false;
				}
			break;
        }
    },


	cancelRequest: function() {
		this.cancelled = true;

		if (this.timeoutID) 
		{
			window.clearTimeout(this.timeoutID);
			this.timeoutID = null;
		}
		this.abortRequest(this);
	},


    abortRequest: function(Handler) 
    {
		if (Handler.XMLHTTPHandler!=null)
		{
			try {
				Handler.XMLHTTPHandler.abort();
				if (Handler.Busy){
					window.status="Aborted";
					Handler.ReturnHandler.onError(
						'timeout',
						'Request timed out',
						Handler);
				}
			}
			catch (e)
			{}

			Handler.Cancelled = true;
			Handler.Busy = false;
		}
	},


	getText: function () 
	{
		return this.XMLHTTPHandler.responseText;
	},


	getXML: function () 
	{
		return this.XMLHTTPHandler.responseXML;
	},


	getTags: function (tagName) 
	{
		try {
			return this.XMLHTTPHandler.responseXML.getElementsByTagName(tagName);
		} 
		catch (e)
		{
			return null;
		}
    },


    getTagText: function (parent,item,index)
	{
		var result = parent.getElementsByTagName(item)[index];
		if (result)
		{
			if (result.childNodes.length > 1) 
			{
				return result.childNodes[1].nodeValue;
			}
			else if (result.childNodes.length==1) 
			{
				return result.firstChild.nodeValue;
			}
		}
		else 
		{ 
			return ""; 
		}
	},


	//Handlers
    onProgress:function(Text,ContentLength) {},
    onError:function(Status,StatusText,Handler) {},
    onLoad:function(Handler) {},
    onInit:function(Handler) {}

}