window.addEvent('domready', function() {
  var currentToggler = $pick(Cookie.read('currentToggler'), 0),
  togglers = $$('.acc_toggler'),
  accordion = new Fx.Accordion(togglers, $$('.acc_element'), {
    opacity: 0,
    display: currentToggler,
    onActive: function(toggler) {
      Cookie.write('currentToggler', togglers.indexOf(toggler));
      toggler.setStyle('color', '#FFCC00'); 
    },
    onBackground: function(toggler) { toggler.setStyle('color', 'White'); }
  });
});