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

function jsddm_open() {
  jsddm_canceltimer();
  jsddm_close();
  ddmenuitem = $(this).find('ul').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').mouseover(jsddm_open);
  $('#jsddm > li').mouseout(jsddm_timer);
});

document.onclick = jsddm_close;