function requestjss(file) {
    console.log("Requesting", file);
    var req = new XMLHttpRequest();

    // report progress events
    req.addEventListener("progress", function(event) {
        if (event.lengthComputable) {
            var percentComplete = event.loaded / event.total;
            if(file==="graphics.js") bar.animate(percentComplete);  // Value from 0.0 to 1.0

            console.log("complete=", percentComplete)
        } else {
            // Unable to compute progress information since the total size is unknown
        }
    }, false);

    // load responseText into a new script element
    req.addEventListener("load", function(event) {
        var e = event.target;
        var s = document.createElement("script");
        s.innerHTML = e.responseText;
        // or: s[s.innerText!=undefined?"innerText":"textContent"] = e.responseText
        document.documentElement.appendChild(s);
        console.log("Finished 2:", file);
        if(file==="/js/graphics.js")
        {
            requestjss("/js/game.js");
        }
        else
        {
            setup_labyrinth(event);
            document.getElementById("loader_div").style.visibility = 'hidden';
        }

        s.addEventListener("load", function() {
            // this runs after the new script has been executed...
            });
    }, false);

    req.open("GET", file);
    req.send();
}