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;
}