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

function navddm_open()
{	navddm_canceltimer();
	navddm_close();
	ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');}

function navddm_close()
{	if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}

function navddm_timer()
{	closetimer = window.setTimeout(navddm_close, timeout);}

function navddm_canceltimer()
{	if(closetimer)
	{	window.clearTimeout(closetimer);
		closetimer = null;}}

$(document).ready(function()
{	$('#navddm > li').bind('mouseover', navddm_open);
	$('#navddm > li').bind('mouseout',  navddm_timer);});

//document.onclick = navddm_close;