var timeout = 500;
var closeTimer = 0;
var menuItem = 0;

function menuOpen()
{
	menuCancelTimer();
	menuClose();
	menuItem = $(this).find('ul').css('visibility', 'visible');
}

function menuClose()
{
	if (menuItem)
		menuItem.css('visibility', 'hidden');
}

function menuTimer()
{
	closeTimer = window.setTimeout(menuClose, timeout);
}

function menuCancelTimer()
{
	if (closeTimer)
	{
		window.clearTimeout(closeTimer);
		closeTimer = null;
	}
}

$(document).ready(function()
{
	$('.categoryMenu > li').mouseover(menuOpen);
	$('.categoryMenu > li').mouseout(menuTimer);
});