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;