public function toString($destroy = true)
 {
     if (!isset($this->attributes['checked'])) {
         foreach ($this->object_name as $obj_name) {
             if (empty($obj_name)) {
                 continue;
             }
             zbx_add_post_js('visibility_status_changeds(false, ' . zbx_jsvalue($obj_name) . ', ' . zbx_jsvalue($this->replace_to) . ');');
         }
     }
     return parent::toString($destroy);
 }