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

function ldmd_open() {
	ldmd_canceltimer();
	ldmd_close();
	ddmenuitem = $(this).find('ul').css('visibility', 'visible');
	ddmenuitem = $(this).find('ul').css({"z-index": "4"});
}

function ldmd_close() {
	if(ddmenuitem) {
		ddmenuitem.css('visibility', 'hidden');
		ddmenuitem.css({"z-index": "0"});
	}
}

function ldmd_timer() {
	closetimer = window.setTimeout(ldmd_close, timeout);
}

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

$(document).ready(function() {
	$('.menu-top > li').bind('mouseover', ldmd_open)
	$('.menu-top > li').bind('mouseout',  ldmd_timer)
});

document.onclick = ldmd_close;