function ajaxObject(url, callbackFunction) 
{  
	var that=this;
	this.updating = false;
  	this.abort = function() 
	{	
		if (that.updating) 
		{	  
			that.updating=false;
	  		that.AJAX.abort();
	  		that.AJAX=null;
		}  
	}  
	this.update = function(passData,postMethod) 
	{
		if (that.updating)
		{ 
			return false;
 		}	
		that.AJAX = null;
		if (window.XMLHttpRequest) 
		{
			that.AJAX = new XMLHttpRequest();
		} 
		else 
		{
			that.AJAX=new ActiveXObject("Microsoft.XMLHTTP");
		}
		if (that.AJAX==null)
		{
			return false;
		} 
		else 
		{
			that.AJAX.onreadystatechange = function() 
			{
				if (that.AJAX.readyState==4)
				{
					that.updating=false;
					that.callback(that.AJAX.responseText,that.AJAX.status,that.AJAX.responseXML);
					that.AJAX=null;

				}
			}
			that.updating = new Date();
			if (/post/i.test(postMethod)) 
			{
				var uri=urlCall+'?'+that.updating.getTime();
				that.AJAX.open("POST", uri, true);
				that.AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				that.AJAX.setRequestHeader("Content-Length", passData.length);
				that.AJAX.send(passData);
	  		} 
			else 
			{
				var uri=urlCall+'?'+passData+'&timestamp='+(that.updating.getTime());
		 		that.AJAX.open("GET", uri, true);
				that.AJAX.send(null);
			}
			return true;
		 }
	 }  
	 var urlCall = url;
	 this.callback = callbackFunction || function () { };
}