var timeout     = 500;
var closetimer	= 0;
var actmenuitem  = 0;

function menu_open()
{
    menu_canceltimer();
    menu_close();
    actmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
}

function menu_close()
{
    if(actmenuitem) actmenuitem.css('visibility', 'hidden');
}

function menu_timer()
{
    closetimer = window.setTimeout(menu_close, timeout);
}

function menu_canceltimer()
{
    if(closetimer)

    {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}

$(document).ready(function()
{
    $('#menu > li').bind('mouseover', menu_open);
    $('#menu > li').bind('mouseout',  menu_timer);
});

document.onclick = menu_close;