var timeout    = 500;
var closetimer = 100;
var ddmenuitem;

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

document.onclick = jsddm_close;