var xmlHttp ;

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) {
		  xmlHttp = new ActiveXObject("Microsoft.XMLHTTP") ;
		}
	}
	return xmlHttp ;
}