菜单下拉列表打开/隐藏的JavaScript代码

<table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#0063a0">
      <tr>
       <td valign="top" bgcolor="#ffffff">
        <a onClick="Javascript:if (d9.style.display=='none'){d9.style.display='';}else {d9.style.display='none';}">
         <table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" bordercolor="#f5f5f5">
          <tr>
           <td height="29" background="../img/admin_photo.gif" bgcolor="#0063a0"><span class="STYLE6">&nbsp;&nbsp;首页推荐管理</span></td>
          </tr>
         </table>
        </a>
        <div id="d9" style="BORDER-RIGHT:#ffcc99 1px; BORDER-TOP:#ffcc99 1px; DISPLAY:none; BORDER-LEFT:#ffcc99 1px; BORDER-BOTTOM:#ffcc99 1px">
         <table width="100%" border="1" align="center" cellpadding="1" cellspacing="0" bordercolor="#f5f5f5">
          <tr>
           <td height="22" class="STYLE3">&nbsp;<a href="Add_Commend.aspx" target="mainFrame">加入推荐</a></td>
          </tr>
          <tr>
           <td height="22" class="STYLE3">&nbsp;<a href="commend_money.aspx" target="mainFrame">推荐参数设置</a></td>
          </tr>
          <tr>
           <td height="22" class="STYLE3">&nbsp;<a href="Show_Vip.aspx" target="mainFrame">已通过审核VIP会员</a></td>
          </tr>
         </table>
        </div>
       </td>
      </tr>
     </table>

红色部分为产生效果的主要代码!
http://hi.baidu.com/zck98530/blog/item/83ff0ff3deb435cb0b46e014.html