document.observe("dom:loaded", function() {

 	$$('#menu > ul > li > ul').invoke('hide');

  $$('#menu > ul > li').each(function(node) {
    var ul = node.getElementsBySelector('ul').first();
    if (ul != undefined) {
      node.onmouseover = node.onmouseout = function() {
        Element.toggle(ul);
      }
    }
  });

});