html проблема

<table width="100%" border="0" cellspacing="0" cellpadding="0">

  <tr>

    <td>

    <table width="100%" border="0" cellspacing="0" cellpadding="0">

  <tr>

    <td width="600px"><div class="header"></div></td>

    <td><div class="headerr">

    <form action="" method="post">

    <div id="block">

    <center>

    <table style="margin-top:4px;" width="240px" border="0" cellspacing="0" cellpadding="0">

    <tr>

    <td width="24%" align="center"><span class="style1">Логин:</span></td>

    <td width="76%"><input style="border:1px #dae8bc solid; color:#999999;" name="login" type="text"></td>

    </tr>

    <tr>

    <td width="24%" align="center"><span class="style1">Пароль:</span></td>

    <td width="76%"><input style="border:1px #dae8bc solid; margin-top:2px; color:#999999;" name="pass" type="password"></td>

    </tr>

    </table>

    </center>



    </div>

    </form>

    </div></td>

  </tr>

</table>

    </td>

  </tr>

  <tr>

    <td>&nbsp;</td>

  </tr>

  <tr>

    <td>&nbsp;</td>

  </tr>

</table>

в Експлоре и Мозиле нормально отображается.

В опере