var http_request = false;
var loc = 0;
var usage = "";

function makeRequest(url, menu, uso) {
	loc = "menu" + menu;
	usage = uso;
	http_request = false;
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
			}
		}
	}
	if (!http_request) {
		alert('Fallo :( Impossible to create a XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = alertContents;
	http_request.open('GET', url, true);
	http_request.send(null);

}

function alertContents() {
	if (http_request.readyState == 4 || http_request.readyState == "complete") {
		if (http_request.status == 200) {
			if (usage == 'menu') {
				for (i = 0; i < 4; i++) {
					document.getElementById('menu' + i).innerHTML = "";

				}
				document.getElementById(loc).innerHTML = http_request.responseText;
			} else {
				document.getElementById('imagen').innerHTML = http_request.responseText;
			}
		} else {
			alert('There was a problem with the request.');
		}
	}
}