php - add to reg: username can't be a BTC address

pool/page_reg.php

@@ -34,8 +34,8 @@ function doregres($data, $u)
 <tr><td>&nbsp;</td>
  <td class=dl><input type=submit name=Register value=Register></td></tr>
 <tr><td colspan=2 class=dc><br><font size=-1><span class=st1>*</span>
- All fields are required</font></td></tr>
+ All fields are required<br>Your Username can't be a BTC address</font></td></tr>
-<tr><td colspan=2 class=dc><br>". passrequires() . "</font></td></tr>
+<tr><td colspan=2 class=dc><br>". passrequires() . "</td></tr>
 </table>
 </form>";