var timeout    = 500;
var closetimer = 0;
var mainmenuitem = 0;
function menu_open(){
   menu_canceltimer();
   menu_close();
   mainmenuitem = $(this).find('ul').css('visibility', 'visible');
}
function menu_close(){
	if(mainmenuitem) mainmenuitem.css('visibility', 'hidden');
}
function menu_timer(){ 
	closetimer = window.setTimeout(menu_close, timeout);
}
function menu_canceltimer(){
	if(closetimer){
		window.clearTimeout(closetimer);
        closetimer = null;
     }
}
$(document).ready(function(){
   $('#jsddm > li').bind('mouseover', menu_open)
   $('#jsddm > li').bind('mouseout',  menu_timer)
});
document.onclick = menu_close;