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

function ddmenu_close()
{	if(ddmenuitem) ddmenuitem.css('display', 'none');}

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

$(document).ready(function(){

$(".dropdown").mouseover(function(){
        ddmenu_canceltimer();
	ddmenu_close();
        ddmenuitem = $(this).find('ul').eq(0).css('display', 'block');
	});

$(".dropdown").mouseout(function(){
        closetimer = window.setTimeout(ddmenu_close, timeout);
        });

});

document.onclick = ddmenu_close;