菜单示例，目前是3个，如果多个再修改JS文件

 <script language=JavaScript1.2>
function showsubmenu(sid) {

eval("submenu0.style.display=/"none/";");
eval("submenu1.style.display=/"none/";");
eval("submenu2.style.display=/"none/";");
 var whichEl = eval("submenu" + sid);
 var menuTitle = eval("menuTitle" + sid);
 if (whichEl.style.display == "none"){
  eval("submenu" + sid + ".style.display=/"/";");
  //if (sid != 0 & sid < 999) {
   //menuTitle.background="images/title_bg_hide.gif";
  //}
 }else{
  eval("submenu" + sid + ".style.display=/"none/";");
  //if (sid != 0 & sid < 999) {
   //menuTitle.background="images/title_bg_show.gif";
  //}
 }
}
</script>
 
   <table cellpadding=0 cellspacing=0 width=265 align=center class="kongkongkong" bgcolor="#F3FDFF">
      <tr>
        <td height=26 class=menu_title

onmouseover=this.className='menu_title2';

onmouseout=this.className='menu_title'; background=images/admin_left.jpg

id=menuTitle0 onClick="showsubmenu(0)" >

<div   class="bianbt" >
          菜单1

    </div>
   
   
     </td>
      </tr>
      <tr>
        <td style="display:" id='submenu0'> <div class=sec_menu

style="width:250">
            <table cellpadding=0 cellspacing=0 align=center width=250

style="POSITION: relative; TOP: 5px">
              <tr>
               <td height=120>
      
菜单1内容

</td>
              </tr>               
            </table>
          </div>
       </td>
      </tr>
    </table>

 

 

   <table cellpadding=0 cellspacing=0 width=265 align=center class="kongkongkong"  bgcolor="#F3FDFF">
      <tr>
        <td height=25 class=menu_title

onmouseover=this.className='menu_title2';

onmouseout=this.className='menu_title'; background=images/admin_left.jpg

id=menuTitle1 onClick="showsubmenu(1)">

<div    class="bianbt">
         菜单2    </div>
   
   
   
   
    </td>
      </tr>
      <tr>
        <td style="display:none" id='submenu1'> <div class=sec_menu

style="width:158">
            <table cellpadding=0 cellspacing=0 align=center width=100%

style="POSITION: relative; TOP: 5px" height="120">
              <tr>
               <td height=120 bgcolor="#F3FDFF">
      
      
      
      
      
  菜单2内容      
      
      
      
      
      
      
      
      
      </td>
              </tr>               
            </table>
          </div>
       </td>
      </tr>
    </table>

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 <table cellpadding=0 cellspacing=0 width=265 align=center class="kongkongkong" bgcolor="#F3FDFF">
      <tr>
        <td height=25 class=menu_title

onmouseover=this.className='menu_title2';

onmouseout=this.className='menu_title'; background=images/admin_left.jpg

id=menuTitle2 onClick="showsubmenu(2)">

 

          <div    class="bianbt">
     菜单3

    </div>
   
   
   
     </td>
      </tr>
      <tr>
        <td style="display:none" id='submenu2'> <div class=sec_menu

style="width:158">
            <table cellpadding=0 cellspacing=0 align=center width=100%

style="POSITION: relative; TOP: 5px">
              <tr>
               <td height=120>
      
      
      
      
  菜单3内容

 

 

 

 

</td>
              </tr>               
            </table>
          </div>
       </td>
      </tr>
    </table>