yige.org 试一个

<html>
<head>
<style type="text/css">
p
{ 
border: thin dotted #FF0000;
}
</style>
<script type="text/javascript">
function changePadding()
{
document.getElementById("p1").style.paddingRight="2cm";
}
</script>
</head>
<body>

<input type="button" onclick="changePadding()"
value="Change right padding" />

<p id="p1">This is a paragraph. This is a paragraph.
This is a paragraph. This is a paragraph.
This is a paragraph. This is a paragraph.</p>

</body>
</html>

结果:

编辑上面的代码，点击查看结果。

yige.org - 试一个