window.addEvent('domready', function() {
  var items = $$("#nav > li");
  for (var i=0; i<items.length; i++)
  {
    items[i].onmouseover=function()
    {
      el = $(this);
      next = $(el.getNext('li'));
      if (next != null)
      {
        next.getFirst('a').addClass('nobg');
      }
    }
    items[i].onmouseout=function()
    {
      el = $(this);
      next = $(el.getNext('li'));
      if (next != null)
      {
        next.getFirst('a').removeClass('nobg');
      }
    }
  }
})