/// AJAX XHR START ///

  function createXHR() 
  {
  	
	if (window.XMLHttpRequest)  // //ie, safari, kconqueror, firefox, nescape, opera
	{	
		return new XMLHttpRequest();
		
	} else if (window.ActiveXObject) 
	{
		isIE = true;
		try {  // win ie4, ie5, ie6
       		return new ActiveXObject("Msxml2.XMLHTTP");
       	} catch (e)
       	{
       		try {
       			return new ActiveXObject("Microsoft.XMLHTTP");
       		} catch (e2)
       		{
       			return null;
       		}
       	}
	}
  }
////// AJAX XHR END ///