  return;
            } else if (!WebUploader.Uploader.support()) {
                alert('Web Uploader 不支持您的浏览器！');
                return;
            }

            // 实例化
            uploader = WebUploader.create({
                pick: {
                    id: '#filePicker',
                    label: "{:lang('Select file')}",
                    multiple: multi,
                },
                timeout: 0,
                formData: {
                    app: '{$app}',
      