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 () { };
}