window.addEvent('domready',function(){
    $$('#menu ul li').each(function(li){
        var sub     = li.getElement('div');
        var link    = li.getElement('a');
        
        if(sub){
            li.addEvents({
                'mouseenter': function(){
                    link.setStyles({
                        'background': 'transparent url(/images/menu_bkg_hover.png) top left repeat-x',
                        'z-index': 100000000
                    });
                    sub.setStyles({
                        'display': 'block',
                        'zindex': 300000
                    });
                    this.setStyles({
                        'zindex': 300000
                    });
                },
                'mouseleave': function(){
                    link.setStyles({
                        'background' : ''
                    });
                    sub.setStyle('display', 'none');
                }
            });
        }
    });
});