jQuery实现360浏览器桌面切换式幻灯片效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>360效果幻灯片</title>
  <script src="jquery-1.7.2.min.js" type="text/javascript"></script>
  <script type="text/javascript" >
    function changeDesktopBg(index) {
      $("#desktopList").animate({"margin-left": -(index*1000)+"px", "speed": 2000});
    }
  </script>
  <style type="text/css" >
    body { margin:0; padding: 0;}
    #desktop ul { padding:0; border-bottom-style:none; width:5000px; list-style:none; }
    #desktop li { padding:0; float:left;}
    .desktop_li_img { width:1000px; height:600px;}
    #desktop { width:1000px; overflow:hidden; height:600px;}
    #controller ul { width:250px; list-style:none;}
    #controller li { width:40px; float:left; padding:0; text-align:center; margin-left:5px; }
    .controller_li_block { background:#F2F2F2; height:10px; line-height:10px; border:2px solid gray; cursor:pointer;}
  </style>
</head>
<body>
<center>
  <div id="desktop">
    <ul id="desktopList">
      <li><img src="img/1.jpg" class="desktop_li_img" alt="屏1" /></li>
      <li><img src="img/2.jpg" class="desktop_li_img" alt="屏1" /></li>
      <li><img src="img/3.jpg" class="desktop_li_img" alt="屏1" /></li>
      <li><img src="img/4.jpg" class="desktop_li_img" alt="屏1" /></li>
      <li><img src="img/5.jpg" class="desktop_li_img" alt="屏1" /></li>
    </ul>
  </div>
  <div id="controller">
    <ul >
      <li><div class="controller_li_block" onclick="changeDesktopBg(0)">1</div></li>
      <li><div class="controller_li_block" onclick="changeDesktopBg(1)">2</div></li>
      <li><div class="controller_li_block" onclick="changeDesktopBg(2)">3</div></li>
      <li><div class="controller_li_block" onclick="changeDesktopBg(3)">4</div></li>
      <li><div class="controller_li_block" onclick="changeDesktopBg(4)">5</div></li>
    </ul>
  </div>
</center>
</body>
</html>