function GetXmlHttpObject() {
	if (window.XMLHttpRequest) {
	  // code for IE7+, Firefox, Chrome, Opera, Safari
	  return new XMLHttpRequest();
	}
	if (window.ActiveXObject) {
	  // code for IE6, IE5
	    try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
	      catch(e) {}
	    try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
	      catch(e) {}
	    try { return new ActiveXObject("Msxml2.XMLHTTP"); }
	      catch(e) {}
	    try { return new ActiveXObject("Microsoft.XMLHTTP"); }
	      catch(e) {}
	    throw new Error("This browser does not support XMLHttpRequest.");
	  
	 }

	return null;
}