Event.observe(window, 'load', loadAccordions, false);
    function loadAccordions() {
        var bottomAccordion = new accordion('vertical_container');
        var nestedVerticalAccordion = new accordion('vertical_container', {
          classNames : {
                toggle : 'vertical_accordion_toggle',
                toggleActive : 'vertical_accordion_toggle_active',
                content : 'vertical_accordion_content'
            }
        });
        bottomAccordion.activate($$('#vertical_container .accordion_toggle')[0]);
    }