function __construct()
 {
     parent::__construct();
     $user = $this->input['user'] ? $this->input['user'] : hg_get_cookie('user');
     $pass = $this->input['pass'] ? $this->input['pass'] : hg_get_cookie('pass');
     $this->setUser($user, $pass);
 }

 function __destruct()
 {
     parent::__destruct();
 }

 function __destruct()
 {
     parent::__destruct();
     $this->db->close();
 }

 function __construct()
 {
     parent::__construct();
 }

 function __destruct()
 {
     parent::__destruct();
     unset($this->marklib);
 }

 //失误方法
 function unknow()
 {
     $this->errorOutput("你搜索得方法不存在");
 }