效果展示 首先！在你的</head>标签前面加上 
<link rel="stylesheet" type="text/css" href="//api.ecylt.com/css/huli.css">
然后在你的</body>前面加上 
<img id="follow-img" src="//api.ecylt.com/images/huli.gif"/>
<script src="//api.ecylt.com/js/huli.js"></script>
大功告成！尽情享受吧~