public function postComment()
{
global $smarty;
session_start();
if ($_SESSION['validate_code'] == strtolower(Tools::getRequest('validate_code'))) {
$comment = new CMSComment();
$comment->copyFromPost();
if ($comment->add()) {
$this->_success = '添加评论成功，请等待管理员审核哟！';
} else {
$this->_errors = $comment->_errors;
}
} else {
$this->_errors[] = '验证码错误！';
}
}
