$(function() {
$('#top_img').crossSlide({
  sleep: 2,  //sec
  fade: 1    //sec
}, [
  { src: 'images_1/top_img_090211_1.jpg' },
  { src: 'images_1/top_img_090211_2.png' },
  { src: 'images_1/top_img_090211_3.jpg' },
  { src: 'images_1/top_img_090211_4.jpg' }
]);
});