prova così...
codice:
 <table height="100%">
      <tr> 
          <td bgcolor="#000000">
           Home
          </td>
      </tr>
      <tr> 
          <td bgcolor="#000000">
           Registrati
          </td>
      </tr>
      <tr> 
          <td bgcolor="#000000" height="100%">
            
       </td>
      </tr>

    
</table>