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;