function QueryString() {
    var qs = window.location.search.substring(1);

    var idx = -1, oldIdx, name, value, ret = new Object();

    for (; ; ) {

        oldIdx = idx + 1;

        idx = qs.indexOf('=', idx);

        if (idx == -1) break;

        name = qs.substring(oldIdx, idx);

        oldIdx = idx + 1;

        idx = qs.indexOf('&', idx + 1);

        if (idx == -1) {
            value = qs.substring(oldIdx);
            ret[name] = value;
            break;
        }
        else {
            value = qs.substring(oldIdx, idx);
            ret[name] = value;
        }
    }

    return ret;
}