yige.org 试一个

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $(".btn1").click(function(){
  $("p").animate({top:"100px"});
  });
  $(".btn2").click(function(){
  $("p").animate({top:"0px"});
  });
});
</script>
</head>
<body>
<button class="btn1">Animate</button>
<button class="btn2">Reset</button>
<div style="position:relative">
<p style="background-color:yellow;width:100px;position:absolute">This is a paragraph.</p>
</div>
</body>
</html>

结果:

编辑上面的代码，点击查看结果。

yige.org - 试一个