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) {}
		}
	}
	return xmlHttp;
	/*if (!xmlHttp) {
		alert('Cannot create XMLHTTP instance');
		return false;
	} else return xmlHttp;*/
}