ecco qui :

codice:
<table border="0" width="100%" style="border-style: ridge; border-width: 1">
  <tr>
    <td width="100%" style="border-style: dashed; border-width: 1"></td>
  </tr>
  <tr>
    <td width="100%" style="border-style: dashed; border-width: 1"></td>
  </tr>
  <tr>
    <td width="100%" style="border-style: dashed; border-width: 1"></td>
  </tr>
  <tr>
    <td width="100%" style="border-style: dashed; border-width: 1"></td>
  </tr>
</table>
ciao