$(document).ready(function() {
   $('#test2').crossSlide({
      speed: 20,
      fade: 1
   }, [
      { src: 'images/1.jpg', dir: 'up'   },
      { src: 'images/2.jpg',   dir: 'down' },
      { src: 'images/3.jpg',  dir: 'up'   },
      { src: 'images/4.jpg', dir: 'down' }
   ]);
});