gistfile1.js

$$('.home_theater #carousel').each(function(element) {
    var EFFECT_OPTIONS = {
      duration: 0.75,
      position: 'parallel',
      transition: S2.FX.Transitions.easeFromTo
    };

    var slides = element.select('.slide'),
        index = 0;

    element.observe('click', handleClick);

    function handleClick(e) {
      var el = e.findElement('.arrow');
      if (el) {
        e.stop();
        return moveToDirection(el.hasClassName('next') ? -1 : 1);
      }
      el = e.findElement('.toggle');
      if (el) {
        e.stop();
        return toggleHotspots(el);
      }
    }

    function moveToDirection(direction) {
      var nextIndex = (slides.length + index + direction) % slides.length,
          nextSlide = slides[nextIndex],
          position = 1000 * direction;

      slides[index].morph('left:' + position + 'px', EFFECT_OPTIONS);
      nextSlide.style.display = 'block';
      nextSlide.style.left = -position + 'px';
      nextSlide.morph('left:0', EFFECT_OPTIONS);
      index = nextIndex;
    }

    function toggleHotspots(button) {
      var hotspots = button.up('.slide').down('.hotspots');
      button.toggleClassName('on');
      hotspots[button.hasClassName('on') ? 'appear' : 'fade']();
    }
  });