private function Add_Comment()
 {
     // 		echo 'http://'.$_SERVER["HTTP_HOST"].$_SERVER["SCRIPT_NAME"].'?'.$_SERVER["QUERY_STRING"];
     // 		echo '<br/>';
     // 		echo PREV_URL;
     global $templates;
     if (isset($_POST['send'])) {
         $url = 'http://' . $_SERVER["HTTP_HOST"] . $_SERVER["SCRIPT_NAME"] . '?' . $_SERVER["QUERY_STRING"];
         if ($url == PREV_URL) {
             if (!Validate::Check_Equals($_SESSION['code'], $_POST['code'])) {
                 Tool::alertBack('验证码不正确,请重新输入');
             }
             if (Validate::Check_Null($_POST['content'])) {
                 Tool::alertBack('内容不能为空');
             }
         } else {
             if (!Validate::Check_Equals($_SESSION['code'], $_POST['code'])) {
                 Tool::alertClose('验证码不正确,请重新输入');
             }
             if (Validate::Check_Null($_POST['content'])) {
                 Tool::alertClose('内容不能为空');
             }
         }
         if (isset($_COOKIE['user'])) {
             $this->model->username = $_COOKIE['user'];
         } else {
             $this->model->username = '******';
         }
         $this->model->cid = $_GET['cid'];
         $this->model->manner = $_POST['manner'];
         $this->model->content = $_POST['content'];
         $templates->assgin('cid', $this->model->cid);
         if ($this->model->Add_Comment()) {
             //添加评论成功后,开始更新content中的评论数
             $content = new ContentModel();
             $content->cid = $_GET['cid'];
             $content->Detail_Comment();
             Tool::alertLocation('评论成功', 'feedback.php?cid=' . $this->model->cid);
         } else {
             Tool::alertLocation('评论失败', 'feedback.php?cid=' . $this->model->cid);
         }
     }
 }