Вопрос Дополнительное поле в форме регистрации

ALTER TABLE `jos_users` ADD `city` VARCHAR( 250 ) NOT NULL ;

<tr>
         <td height="40">
                <label id="citymsg" for="city">
                        <?php echo JText::_( 'City' ); ?>:
                </label>
         </td>
         <td>
                <input type="text" id="city" name="city" size="40" 

value="<?php echo $this->user->get( 'city' );?>" class="inputbox required validate-city" maxlength="25" /> *
         </td>
 </tr>

<tr>
  <td class="key">
    <label for="city">
            <?php echo JText::_( 'City' ); ?>
        </label>
    </td>
   <td>
     <input type="text" name="city" id="city" class="inputbox" size="40" 

value="<?php echo $this->user->get('city'); ?>" autocomplete="off" />
    </td>
                                </tr>

var $username          = null;

var $city              = null;

               if (trim( $this->city ) == ) {
                        $this->setError( JText::_( 'Please enter a city.') );
                        return false;
                }

$user =& JFactory::getUser();
 echo $user->city;