function GetXmlHttpObject(){
		var xmlHttp=null;
		try {
		 // Firefox, Opera 8.0+, Safari
		 xmlHttp=new XMLHttpRequest();
		}
		catch (e){
		 //Internet Explorer
			try{
				xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
			}
		 	catch (e){
				try{
					xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch (e){
					alert("Your Browser not support AJAX!");
					return false;
				}
			}
		}
		return xmlHttp;
	}