var timeout = 500;
    var closetimer = 0;
    var ddmenuitem = 0;

    function jsddm_open() {
        jsddm_canceltimer();
        jsddm_close();
        ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
    }

    function jsddm_close()
    { if (ddmenuitem) ddmenuitem.css('visibility', 'hidden'); }

    function jsddm_timer()
    { closetimer = window.setTimeout(jsddm_close, timeout); }

    function jsddm_canceltimer() {
        if (closetimer) {
            window.clearTimeout(closetimer);
            closetimer = null;
        }
    }

    $(document).ready(function () {
        $('#jsddm > li').bind('mouseover', jsddm_open);
        $('#jsddm > li').bind('mouseout', jsddm_timer);
    });

    document.onclick = jsddm_close;