<td><input class="form-control" type="text" name="newemail" value="" required></td>
</tr>
<tr>
- <td colspan="2"><input type="submit" name="addmail" value="<?=_I own or am authorised to control this email address?>"></td>
+ <td colspan="2"><input class="btn btn-primary" type="submit" name="addmail" value="<?=_I own or am authorised to control this email address?>"></td>
</tr>
</table>