protected function _afterSave(Mage_Core_Model_Abstract $object)
{
$detail = array(
'title' => $object->getTitle(),
'detail' => $object->getDetail(),
'nickname' => $object->getNickname(),
'email' => $object->getEmail(), // 新增的email字段
);

$fieldset->addField('email', 'text', array( // 添加一个field
'label' => Mage::helper('review')->__('email'),
'required' => true,
'email' => 'email'
));