function getXmlHttpRequestObject() {
	if (window.XMLHttpRequest) {return new XMLHttpRequest();} // Not IE
	else if(window.ActiveXObject) {return new ActiveXObject("Microsoft.XMLHTTP");} // IE
	else {alert("Your browser doesn't support the XmlHttpRequest object.");}
}

var ajaxReq = getXmlHttpRequestObject(); // Get browser-specific XmlHttpRequest object.