var timeout         = 100;
var closetimer		= 0;
var ddmenuitem      = 0;

function ddnav_open()
{	ddnav_canceltimer();
	ddnav_close();
	ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');}

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

function ddnav_timer()
{	closetimer = window.setTimeout(ddnav_close, timeout);}

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

$(document).ready(function()
{	$('#ddnav > li').bind('mouseover', ddnav_open);
	$('#ddnav > li').bind('mouseout',  ddnav_timer);});

document.onclick = ddnav_close;