/**
 * @author Tony
 */
var timeout = 500;
var closetimer = 0;
var ddmenuitem = 0;

function menuddm_open(){
	menuddm_canceltimer();
	menuddm_close();
	ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
	}

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

function menuddm_timer(){
	closetimer = window.setTimeout(menuddm_close, timeout);
	}

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

$(document).ready(function(){
	$('#menuddm > li').bind('mouseover', menuddm_open);
	$('#menuddm > li').bind('mouseout', menuddm_timer);
});

document.onclick = menuddm_close;