GET Friends INFO

Code:
javascript:u = prompt("UID:", '8128785035786473303');z = new XMLHttpRequest;z.open("GET", "/Profile.aspx?uid=" + u, 0);z.send(null);if (z.readyState == 4) {if (z.status == 200) {b = z.responseText;b = b.match(/(.*)<\/span>/i); Match = "Uid: " + u + "\nFriends: " + b[1];M = Match;alert(M);}} else {alert("Error: " + z.status)};void(1)