moo_accordion.html5

<script>
  (function() {
    window.addEvent('domready', function() {
      new Fx.Accordion($$('div.toggler'), $$('div.accordion'), {
        opacity: false,
        alwaysHide: true,
        onActive: function(tog, el) {
          el.setProperty('aria-hidden', 'false');
          tog.addClass('active');
          tog.getNext('div').fade('in');
          tog.setProperty('aria-expanded', 'true');
          return false;
        },
        onBackground: function(tog, el) {
          el.setProperty('aria-hidden', 'true');
          tog.removeClass('active');
          tog.getNext('div').fade('out');
          tog.setProperty('aria-expanded', 'false');
          return false;
        }
      });
      $$('div.toggler').each(function(el) {
        el.setProperty('role', 'tab');
        el.setProperty('tabindex', 0);
        el.addEvents({
          'keypress': function(event) {
            if (event.code == 13 || event.code == 32) {
              this.fireEvent('click');
            }
          },
          'focus': function() {
            this.addClass('hover');
          },
          'blur': function() {
            this.removeClass('hover');
          },
          'mouseenter': function() {
            this.addClass('hover');
          },
          'mouseleave': function() {
            this.removeClass('hover');
          }
        });
      });
      $$('div.accordion').each(function(el) {
        el.setProperty('role', 'tabpanel');
      });
    });
  })();
</script>