window.addEvent('domready', function() { var num = 0; var myAccordion = new Accordion($('accordion'), 'h2.toggle', 'div.box', { opacity: true, display: 0, onActive: function(toggler, element){ toggler.set('class', ''); }, onBackground: function(toggler, element){ toggler.set('class', 'unselected'); } }); });