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

document.onclick = jsddm_close;