function map($field, $value, $fieldinfo) {
extract($fieldinfo);
$setting = string2array($setting);
$size = $setting['size'];
$errortips = $this->fields[$field]['errortips'];
$modelid = $this->fields[$field]['modelid'];
$tips = $value ? L('editmark','','map') : L('addmark','','map');
return '';
}