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

function ambush_open(){
	ambush_canceltimer();
	ambush_close();
	ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
}

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

function ambush_timer(){
	closetimer = window.setTimeout(ambush_close, timeout);
}

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

$(document).ready(function(){
	$('#ambush > li').bind('mouseover', ambush_open);
	$('#ambush > li').bind('mouseout',  ambush_timer);
});

document.onclick = ambush_close;