<link id=mm href="01.css" rel="stylesheet" type="text/css">
<body>
<input type=button value=02 onclick="document.all.mm.href='02.css'">
<input type=button value=03 onclick="document.all.mm.href='03.css'">
</body>
<body>
<input type=button value=02 onclick="document.all.mm.href='02.css'">
<input type=button value=03 onclick="document.all.mm.href='03.css'">
</body>
<input type="button" value="换样式" onclick="document.all.myCss.href='/ctkj/test/02.css';">