var req = false;
if(window.XMLHttpRequest) {
	try {
		req = new XMLHttpRequest();
	} catch(e) {
		req = false;
	}
} else if(window.ActiveXObject) {
	try {
		req = new ActiveXObject("Msxml2.XMLHTTP");
	} catch(e) {
		try {
			req = new ActiveXObject("Microsoft.XMLHTTP");
		} catch(e) {
			req = false;
		}
	}
}