function GetXmlHttpObject(){
	var xmlHttp=null;
	try{xmlHttp=new XMLHttpRequest();// Firefox, Opera 8.0+, Safari
		}catch (e){
	try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");// Internet Explorer
		}catch (e){
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");// IE - 6
		}
  	}
	return xmlHttp;
}