例在<head>与</head>之间的CSS代码：css
<style type="text/css">
.style1 { font-size: 12px; background: url(image/buttonbg1.gif); border: 0px; width: 60px; height: 22px}
.style2 { font-size: 12px; font-weight: bold; background: url(image/buttonbg2.gif); border: 0px 0; width: 60px; height: 22px}
</style>this
按钮 代码以下：url
<input type="submit" name="Submit2" value="" οnmοuseοver="this.className='style1'" οnmοuseοut="this.className='style3'" class="style1">spa