$(function(){
	var timeout = 500;
	var closetimer = 0;
	var ddmenuitem = 0;
	function Dropdown_open(){
		Dropdown_canceltimer();
		Dropdown_close();
		ddmenuitem=$(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;
		}
	}
	$(function(){
		$('#Dropdown > li').bind('mouseover', Dropdown_open);
		$('#Dropdown > li').bind('mouseout',  Dropdown_timer);
	});
	document.onclick=Dropdown_close;
});