var timeout         = 500;
	var closetimer		= 0;
	var ddmenuitem      = 0;
	
	function dropdown_open()
	{	dropdown_canceltimer();
		dropdown_close();
		ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');}
	
	function dropdown_close()
	{	if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}
	
	function dropdown_timer()
	{	closetimer = window.setTimeout(dropdown_close, timeout);}
	
	function dropdown_canceltimer()
	{	if(closetimer)
		{	window.clearTimeout(closetimer);
			closetimer = null;}}
	
	$(document).ready(function()
	{	$('.menu > li').bind('mouseover', dropdown_open);
		$('.menu > li').bind('mouseout',  dropdown_timer);});
	
	document.onclick = dropdown_close;