public function manageAttributes($tagName, array $attributes)
{
$valid = $this->_item->isValid();
$attributes['class'] = Opf_Design::getClass($this->getComponentName() . '.field', $valid);
if ($attributes['class'] === null) {
$attributes['class'] = Opf_Design::getClass('field', $valid);
}
return $attributes;
}
