想写一个自动提交的软件 但是按钮没反应求解
<form id="login" name="aa" action="/abc/Login/login.do" method="post">
   <table width="780" border="0" align="center" cellpadding="0" cellspacing="0" background="/wlyxpb/images/dl_3.jpg">
    <tr>
     <td width="780" height="139">
     </td>
    </tr>
   </table>
   <table width="780" border="0" align="center" cellpadding="0" cellspacing="0" background="/abc/images/dl_5.jpg">
    <tr>
     <td width="780" height="72">
     </td>
    </tr>
   </table>
   <table width="780" border="0" align="center" cellpadding="0" cellspacing="0">
    <tr>
     <td width="440" height="179" background="/abc/images/dl_6.jpg">
     </td>
     <td width="282" valign="top" bgcolor="#FFFFFF">
      <table width="282" border="0" cellspacing="0" cellpadding="0" background="/abc/images/dl_7.jpg">
       <tr>
        <td width="282" height="45">
        </td>
       </tr>
      </table>
      <table width="230" border="0" align="center" cellpadding="0" cellspacing="0">
       <tr>
        <td width="65" height="46" class="denglu">
         用 户 名
        </td>
        <td colspan="2">
         <input type="text" name="userName" value="" id="userName" style="width:120px"/>
        </td>
       </tr>
       <tr>
        <td height="46" class="denglu">
         密 码
        </td>
        <td colspan="2">
         <input type="password" name="passWord" id="passWord" style="width:120px"/>
        </td>
       </tr>
       <tr>
        <td width="65" height="35">
         
        </td>
        <td width="100" align="center">
         <span class="denglu">记住密码</span>
        &nbs