window.addEvent('domready', function() {
        if(Browser.Engine.trident){ // <-- si es IE
            var cont = $('container');
            cont.setStyle('left', 0);
            cont.setStyle('top', cont.getStyle('top').toInt() + 10);
        }

        var fx = new Fx();
        $$('ul#topmenu li').each(function(item){
            var aux = item.getElement('ul');
            if(aux != null){
                var orig_width = aux.getStyle('width');
                var orig_height = aux.getStyle('height');
                aux.setStyles({'display': 'none', 'opacity': 0, 'z-index': 1000 });
                if(Browser.Engine.trident){ // <-- si es IE
                        aux.setStyles({'width': orig_width, 'height': orig_height});
                }

                item.addEvents({
                    'mouseenter': function(){
                        aux.setStyle('display', 'block');
                        aux.fade(1);
                     },

                    'mouseleave': function(){
                        aux.fade(0);
                        aux.setStyles({'display': 'none'});
                    }
                });
            }
        });
});