code: function(result) {
  
          if (!this.destroyed && this.open) {
  
              if (result !== undefined) {
                  this.returnValue = result;
              }
  
              this.__popup.hide().removeClass(this.className + '-show');
              this.__backdrop.hide();
              this.open = false;
              this.blur(); // 恢复焦点，照顾键盘操作的用户
              this.__dispatchEvent('close');
          }
  
          return this;
      }
docs: 关闭浮层