让Js顺序执行且回调之

<script src="aaa"></script>
<script type="aaasdf" id="asdf">
    function aaa()
    {
    }
</script>

<script>
    var scripts = [];
    $('script[src!=""]').each(function () {
        scripts.push($(this).attr('src'));
    });

    function load(x, y) {
        if (x > scripts.length) {
            y();
            return;
        }
        var script = scripts[x];
        loadScript(script, load(x++, y));
    }

    load(0, callback);

    var jsArray = {};
    function loadScript(a, b) {
        if (jsArray[a]) b && b();
        else {
            jsArray[a] = !0;
            var c = document.getElementsByTagName("body")[0],
                d = document.createElement("script");
            d.type = "text/javascript", d.src = a, d.onload = b, c.appendChild(d);
        }
    }
</script>