left 菜单只在只在left菜单下跳转

left 菜单只在只在left菜单下跳转 我想的是在右边的菜单进行跳转 可就是不好使 怎么解决啊右面的叫mainFrame   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Slashdot's Menu</title>
<link rel="stylesheet" type="text/css" href="sdmenu/sdmenu.css" />
<script type="text/javascript" src="sdmenu/sdmenu.js">
</script>
<script type="text/javascript">
// <![CDATA[
var myMenu;
window.onload = function() {
myMenu = new SDMenu("mainFrame");
myMenu.init();
};
// ]]>
</script>
  </head>
  <body>  <?php 
if($_SESSION["lv"]=="root" && $info[0]=1){
?>
    <div style="float:left" id="mainFrame" class="sdmenu">
      <div>
        <span>管理控制面板</span>
        <a href="public/password.php">修改密码</a>
        <a href="gg.php">修改公告r</a>
      </div>
      <div>
        <span>用户管理</span>
        <a href="root/user_add.php">新增开户</a>
        <a href="root/user.php">管理用户</a>
        <a href="root/user_del.php">删除用户</a>
      </div>
      <div class="collapsed">
        <span>Partners</span>
        <a href="http://www.javascriptkit.com">JavaScript Kit</a>
        <a href="http://www.cssdrive.com">CSS Drive</a>
        <a href="http://www.codingforums.com">CodingForums</a>
        <a href="http://www.dynamicdrive.com/style/">CSS Examples</a>
      </div>
      <div>
        <span>Test Current</span>
        <a href="?foo=bar">Current or not</a>
        <a href="./">Current or not</a>
        <a href="index.html">Current or not</a>
        <a href="index.html?query">Current or not</a>
      </div>    </div>
<?php }?>
  </body>
</html>