Imitation Tencent QQ window jitter effect code implemented by javascript_Page background

<img id="win" style="max-width:90%" src="http://www.jb51.net/upload/20080907101743898.jpg" alt="Imitation Tencent QQ window jitter effect code implemented by javascript_Page background" > <button onclick="zd()">Vibration</button> <a href="http://www.jb51.net/"> </a>Welcome to Script Home, www.jb51.net
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

]<script> function zd(u){ var a=['top','left'],b=0; u=setInterval(function(){ document.getElementById('win').style[a[b%2]]=(b++)%4<2?0:4; if(b>15){clearInterval(u);b=0} },32) } </script>