var g_menu_timeout = 500;
var g_menu_timer = 0;
var g_menu_item = 0;

function menu_open(){
  menu_cancel_timer();
  menu_close();
  g_menu_item = $(this).find('ul').eq(0).css('visibility', 'visible');
}

function menu_close(){
  if(g_menu_item){
    g_menu_item.css('visibility', 'hidden');
  }
}

function menu_timer(){
  g_menu_timer = window.setTimeout(menu_close, g_menu_timeout);
}

function menu_cancel_timer(){
  if(g_menu_timer){
    window.clearTimeout(g_menu_timer);
    g_menu_timer = null;
  }
}

$(document).ready
(
 function(){
   $('#menucontainer > li').bind('mouseover', menu_open);
   $('#menucontainer > li').bind('mouseout',  menu_timer);
 }
 );

document.onclick = menu_close;