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

function jsddm_open() {	
	jsddm_canceltimer();
	jsddm_close();
	$ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
}

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

function jsddm_timer() {
	closetimer = window.setTimeout(jsddm_close, timeout);
}

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

$(document).ready(function() {	
	$("li.dropdown").bind('mouseover', jsddm_open);
	$("li.dropdown").bind('mouseout',  jsddm_timer);
});

document.onclick = jsddm_close;