<style type="text/css">
<!--
#header {
 height: 100%;
 width: 400px;
 margin: 0px;
 padding: 0px;
 border: 1px solid #dddddd;
 font-family: "宋体";
 font-size: 12px;
}
#menu {
 margin: 0px;
 padding: 0px;
 list-style-type: none;
}
#menu li {
 display: block;
 height: 26px;
 width: 50px;
 text-align: center;
 line-height:25px;
 float: left;
 margin: 0px;
 padding-top: 0.2em;
 padding-right: 0px;
 padding-bottom: 0.2em;
 padding-left: 0px;
 cursor: hand;
}
.sec1 { background-color: #FFFF00;background-image: url(imger/067.gif);}
.sec2 { background-color: #ff0000;background-image: url(imger/066.gif);}
.block { display: block;}
.unblock { display: none;}
-->
</style>
<script language=javascript>
function secBoard(n)
{
 for(i=0;i<menu.childNodes.length;i++)
 menu.childNodes[i].className="sec1";
 menu.childNodes[n].className="sec2";
 
 for(i=0;i<main.childNodes.length;i++)
 main.childNodes[i].style.display="none";
 main.childNodes[n].style.display="block";
 
}
</script>
<div id="header">
                <table width="100%" border="0" cellspacing="0" cellpadding="0">
                      <tr>
                        <td height="26" valign="bottom" background="imger/020.gif"> 
                          <div id="menu">
                            <li onMouseOver="secBoard(0)" class="sec1"><font color="#666666">111111</font></li>
                            <li onMouseOver="secBoard(1)" class="sec2"><font color="#666666">222222</font></li>
                            <li onMouseOver="secBoard(2)" class="sec2"><font color="#666666">333333</font></li>
                            <li onMouseOver="secBoard(3)" class="sec2"><font color="#666666">444444</font></li>
                            <li onMouseOver="secBoard(4)" class="sec2"><font color="#666666">555555</font></li>
                          </div></td>
                    </tr>
                  </table>
  <!--内容显示区域-->
  <div id="main">
    <div class="block">1</div>
    <div class="unblock">2</div>
    <div class="unblock">3</div>
    <div class="unblock">4</div>
    <div class="unblock">5</div>
  </div>
  <!--内容显示区域-->
</div>