Table嵌套去掉子table的外边框

 <table align="center" style="border:none;cell-padding:0; cell-spacing:0;border-collapse:collapse;">

  <tr>

         <td colspan="10">

               <table border="1" bordercolor="#000000" cellpadding="0" cellspacing="0" style="border-collapse:collapse;border:1px solid #ffffff;">

                        .........

                </table>

        </td>

    </tr>

</table>