var DropdownMenu = new Class({	
	initialize: function(element) {

		$A($(element).childNodes).each(function(el) {

			if(el.nodeName.toLowerCase() == 'li') {

        $A(el.childNodes).each((function(el2) {
          
					if(el2.nodeName.toLowerCase() == 'ul') {
            $(el2);
            el2.fx = new Fx.Slide(el2, { 'duration': 500, 'mode': 'vertical' });
            el2.fx.hide();

            this.addEvent('click', (function(e) {
              this.fx.toggle();
						}).bind(el2));

            // kvuli IE aby spravne posilal eventy
            el2.setStyle('background', '#FFF');

						this.addEvent('mouseleave', (function(e) {
              this.fx.slideOut();
            }).bind(el2));
					}

				}).bind($(el)));

			}

		});

		return this;
	}
});

// nacteni
window.addEvent('domready', function(){
  new DropdownMenu($E('div#navbar-2 ul'));
});