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(){
	$('#nav > li').bind('mouseover', jsddm_open)
	$('#nav > li').bind('mouseout',  jsddm_timer)
	});
document.onclick = jsddm_close;