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.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 () { };
}