var SlideIn = {
  start: function () {
    var delay = 200;
    $$('.thumb').each(function (el) { 
      el.setStyles({
        'position': 'relative',
        'top': el.getParent().offsetTop - el.offsetTop,
        'left': el.getParent().offsetLeft - el.offsetLeft,
        'opacity': 0
      });
      var fx = el.effects({transition:Fx.Transitions.Back.easeOut});
      fx.start.delay(delay, fx, {
        'opacity': 1,
        'top': 0,
        'left': 0
      });
      delay += 200;
    });
  }
};
 
window.addEvent('load', SlideIn.start);
new Asset.css('style.css');