function WallElement(&$wall, $attributes = array())
 {
     $this->_wall =& $wall;
     $this->preferred_markup = TagUtil::getWallMarkUp($this->_wall->getCapa('preferred_markup'));
     foreach ($attributes as $name => $value) {
         if (isset($this->{$name})) {
             if (strtolower($value) == 'false') {
                 $value = false;
             } else {
                 if (strtolower($value) == 'true') {
                     $value = true;
                     #                } else if (is_numeric($value)) {
                     #                    $value = (int)$value;
                 }
             }
             $this->{$name} = $value;
         }
     }
 }