可以收缩和和伸展的表格（符合标准的网页特效）
<!-- http://www.knowsky.com/js -->
<!-- bbs http://www.knowsky.com/bbs-->
<!-- 完整的HTML代码如下 -->
<html>
<head>
</head>
<body>
<script LANGUAGE="JavaScript">
var screenad=screen.width-135;
document.write('<DIV ID="Layer_ad" STYLE="position:absolute; width:110; height:300; z-index:1; left: 18px; top: 140px"><a href=http://www.knowsky.com/ & target=_blank><img src="/img2/js050121_1.gif" border=0></a></DIV>');
document.write('<DIV ID="Layer_ad" STYLE="position:absolute; width:110; height:300; z-index:1; left: '+screenad+'px; top: 140px"><a href=http://js.knowsky.com/ & target=_blank><img src="/img2/js050121_2.gif" border=0></a></DIV>');
</script>
</body>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br>
<p><font color=red>//转载请注明出处:网页教学网。</font></p>