var verticalAccordion = new accordion('container', {
    resizeSpeed : 8,
    classNames : {
        toggle : 'accordion_toggle',
        toggleActive : 'accordion_toggle_active',
        content : 'accordion_content'
    },
    defaultSize : {
        height: null,
        width : null
    },
    direction : 'vertical',
    onEvent : 'click'
});



var verticalAccordions = $$('.accordion_toggle');
verticalAccordions.each(function(accordion) {
    $(accordion.next(0)).setStyle({
        height: '0px'
    });
});