W3School TIY
编辑您的代码：
<html> <head> <script type="text/javascript"> function shakeleft() { document.getElementById('image').style.position="relative" document.getElementById('image').style.left="3" timer=setTimeout("shakeright()",10) } function shakeright() { document.getElementById('image').style.left="0" timer=setTimeout("shakeleft()",10) } function stoptimer() { clearTimeout(timer) } </script> </head> <body> <b>请把鼠标移动到图像上，会看到它在摇动：）</b><br /> <img id="image" src="../i/eg_smile.gif" onmouseover="shakeleft()" onmouseout="stoptimer()" /> </body> </html>
查看结果: