/ 把dnsConf中的值填充到表单中
    function showConf(idx) {
      const conf = dnsConf[idx] ?? {};
      for (const name in conf) {
        if (SKIPPED_NAMES.includes(name)) {
          continue;
        }

        const $e = document.querySelector(`[name=${name}]`);
        // 判断对应input的类型
        switch ($e.getAttribute("type")) {
          case "checkbox":
            $e.checked = conf[name];
            break;
          case "radio":
            document.querySelector(`[name=${nam