function getXMLHTTPRequest() {
	try {
	req = new XMLHttpRequest();
	} catch(err1) {
	    try {
	    req = new ActiveXObject("Msxml2.XMLHTTP");
	    } catch (err2) {
	        try {
	        req = new ActiveXObject("Microsoft.XMLHTTP");
	        } catch (err3) {
	            req = false;
	        }
	    }
	}
	return req;
}