window.cometicsStickyElements = new Cosmetics.StickyElements();

Event.observe(document, 'dom:loaded', function() {
  // Sticky ads  
  $$('.ad-area.sticky').each(function(el) {
    window.cometicsStickyElements.add(el, {
      observe: 'adsys:all-done',
      delay: 1500
    });
  });
});