function createRequest() {
	if (window.XMLHttpRequest)
		request = new XMLHttpRequest();
	else if (window.ActiveXObject) {
		try {
			request = new ActiveXObject('Msxml2.XMLHTTP');
		} catch (e){}
		try {
			request = new ActiveXObject('Microsoft.XMLHTTP');
		}
		catch (e){}
	}
	if (!request)
		alert("Error initializing XMLHttpRequest!");
	var url = "http://test.ru/test/";
	request.open("GET", url, true)
	request.onreadystatechange = updatePage;
	request.send(null);
}

function updatePage() {
	if (request.readyState ==  4 ) {
		if (request.status ==  200 ) {
			var leftmenu = document.getElementById('leftmenu');
			if (leftmenu==null) return;
			leftmenu.innerHTML = request.responseText;
		}
	}
}