private function _init()
 {
     if (!isset($_GET['m']) || !is_numeric($_GET['m'])) {
         $this->_model->mid = 1;
     } else {
         $this->_model->mid = $_GET['m'];
     }
     $this->_tpl->assign('mid', $this->_model->mid);
     $getParam = $this->_model->getParam();
     $num = 0;
     foreach ($getParam as $key => $value) {
         if (!$value) {
             $getParam->{$key} = '参数' . ++$num;
         }
     }
     $this->_tpl->assign('getParam', $getParam);
     $_module = new MenuModel();
     $_module->mid = $this->_model->mid;
     $_module_name = $_module->getOneModule();
     if ($_module_name->module_name == '下载中心') {
         $this->_tpl->assign('download', true);
     }
 }