var http = false;
if(navigator.appName == "Microsoft Internet Explorer") {
	http = new ActiveXObject("Microsoft.XMLHTTP");
}
else {
	http = new XMLHttpRequest();
}

function download(file, user) {
	http.abort();
    http.open("GET", "index.php?file=" + file + "&user=" + user, true);
    http.onreadystatechange=function() {
    	if(http.readyState == 4) {
			document.getElementById('ajaxresponse').innerHTML = http.responseText;
		}
	}
	http.send(null);
}