<ul>
  <li><img src="images/1.jpg"></li>
  <li><img src="images/2.jpg"></li>
  <li><img src="images/3.jpg"></li>
  <li><img src="images/4.jpg"></li>
</ul>

<style type="text/css">
  ul,li {
    display: block;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  ul {
    width: 800px;
    height: 210px;
    border: 1px solid #333;
    margin: 100px auto;
    padding: 0 5px;
  }
  li {
    position: relative;
    float: left;
    width: 190px;
    height: 190px;
    margin: 10px 5px;
  }
  img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
  }
</style>

<script type="text/javascript">
  $(function(){
    $('img').hover(function(){
      $(this).animate({
        'top' : '-10px'
      },'normal');
    },function(){
      $(this).animate({
        'top' : '0px'
      },'normal');      
    });
  })
</script>