function createRequest() {
	try {
		request = new XMLHttpRequest();
	}
	catch (trymicrosoft) {
		try {
			request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (othermicrosoft) {
        	try {
        		request = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch (failed) {
        		request = null;
        	}
        }
	}

	if (request == null) {
		alert("Error creating request object!");
	}
}