<script type="text/javascript">
document.getElementById('myLink').style.position="relative"
document.getElementById('myLink').style.left="3"
timer=setTimeout("shakeright()",10)
document.getElementById('myLink').style.left="0"
timer=setTimeout("shakeleft()",10)
<a id="myLink" href="//www.w3xue.com/"
onmouseover="shakeleft()" onmouseout="stoptimer()">请把鼠标移动到链接上</a>