[CODE]<html>
<HEAD>
<TITLE>TEST</TITLE>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
<STYLE type=text/css>
body {font-size:12px;padding:1em 0.5em;margin:0;font-family:Arial, Helvetica, sans-serif;}
a:link {color:#0389DA;}
img {border:0;}
.bluelink {color:#0389DA;}
#header {background:#B0C9E1;border:1px solid #ccc;padding:5px 5px 5px 10px;}
#nav {background:#fff;border:0;border-left:1px solid #ccc;width:160;height:200px;z-index:999;position:absolute;}
#nav .menu {border:0;border-bottom:1px solid #ccc;border-right:1px solid #ccc;padding:10px 10px;height:30px;cursor:pointer;background:#eee;}
#nav .menu a {display:block}
#nav .active {border-right:0;background:#fff;}
#nav .active a {color:#000;text-decoration:none;}
#content {float:right;border:1px solid #ccc;border-top:0;padding:15px 10px 10px 11px;width:581px;height:400px;z-index:0;}
#footer {margin-top:2em;border-top:1px solid #ccc;padding:1em 0;color:#666;text-align:center;clear:both;}
#infotable p {margin:1em 0;}
</STYLE>
<SCRIPT language="javascript">
function changePreview(ff) {
divs = document.getElementById('nav').getElementsByTagName('DIV');
divs[ff].className="active menu"
eval("document.getElementById('infotable"+ff+"').style.display='block'");
for(a=0;a<divs.length;a++){
if(a==ff){continue;}
divs[a].className="menu"
eval("document.getElementById('infotable"+a+"').style.display='none'");
}
}
</SCRIPT>
</HEAD>
<BODY>
<CENTER>
<DIV style="WIDTH: 740px; TEXT-ALIGN: left;">
<DIV id="header"><B>TEST</B></DIV>
<!--菜单-->
<DIV id="nav">
<DIV class="active menu">
<A class="bluelink" onClick="changePreview(0)" href="#" >menu1</A></DIV>
<DIV class="menu">
<A class="bluelink" onClick="changePreview(1)" href="#" >menu2</A></DIV>
<DIV class="menu">
<A class="bluelink" onClick="changePreview(2)" href="#" >menu3</A></DIV>
<DIV class="menu">
<A class="bluelink" onClick="changePreview(3)" href="#" >menu4</A></DIV>
<DIV class="menu">
<A class="bluelink" onClick="changePreview(4)" href="#" >menu5</A></DIV>
<DIV class="menu">
<A class="bluelink" onClick="changePreview(5)" href="#" >menu6</A></DIV>
</DIV>
<!--内容-->
<DIV id="content">
<DIV id="infotable0">Content1</DIV>
<DIV id="infotable1" style="DISPLAY: none">Content2</DIV>
<DIV id="infotable2" style="DISPLAY: none">Content3</DIV>
<DIV id="infotable3" style="DISPLAY: none">Content4</DIV>
<DIV id="infotable4" style="DISPLAY: none">Content5</DIV>
<DIV id="infotable5" style="DISPLAY: none">Content6</DIV>
</DIV>
<!--页脚-->
<DIV id="footer"><A href="#">Link1</A> - <A href="#">Link2</A> - <A href="#">Link3</A> - <A href="#">Link4</A> - <A href="#">Link5</A><BR><BR><A href="#">Link6</A> - <A href="#">Link7</A> - <A href="#">Link8</A><BR><BR>Copyright Info<BR>
</DIV>
</CENTER>
</BODY>
</html>[/CODE]
改一改就行了