<div id="containerr">
  <div id="header"></div>
  <div id="mainContent">
  <table>
   <td>
    <tr>   
    <div id="sidebar" style="border:1px solid gray; ">
     <form id="form1" runat="server">
     <div> 
     <asp:TreeView ID="tree" runat="server">
     </asp:TreeView> 
     </div>
    </form> 
   </div> 
 <td style="width: 10pt"><div class="navPoint" id="switchPoint" onclick="switchSysBar()"      style="background:#666666;width:12px; background:url(images/01.gif);cursor:pointer" >3</div>   
  </td>
  <td style="WIDTH: 100%">
  <div id="content">
  <div style="z-index:9;width:100%;height:530px; border-top:1px solid gray"id="container"></div>
  </div>
  </td>
  </td>
 </tr>
</table>  
  </div>
  </div>

body{background:#ecefff repeat top left;}
table{ margin:20px auto;}
.NiuNiutree{width:220px; height:500px; overflow:auto;}
.navPoint{COLOR:#666;CURSOR:hand;FONT-FAMILY:Webdings; FONT-SIZE:9pt}