/* Hide sub unordered lists */

/*$$('#dropdown ul').each(function(node){

    Element.hide(node);

});*/

window.onload = function(){
    /* A function that toggles the visibility of nested ul's */

    // For every li

    $$('#dropdown li').each(function(node){

        // if there's a ul

        var ul = $A(node.getElementsByTagName('ul')).first();

        if(ul != null){

            // toggle it’s visibility on these events

            node.onmouseover = function(){

                Element.show(ul);

            }

            node.onmouseout = function(){

                Element.hide(ul);

            }

        }

    });

}