两行代码实现的QQ窗口抖动效果

两行JavaScript代码的QQ窗口抖动效果

<img  id="win" style='position:relative' src="https://img.aspxhome.com/file/UploadPic/20089/6/200896124734762.jpg"><br /><br /><button onclick="zd()">振动</button><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>