(function () {
  document.addEventListener('DOMContentLoaded', function () {
    var btn = document.getElementById('btnOpenBatchTool');
    if (!btn) return;
    btn.addEventListener('click', function (e) {
      e.preventDefault();
      try {
        window.open(
          'batch_tool.html',
          'calendar_batch_' + Date.now(),
          'width=1280,height=900,resizable=yes,scrollbars=yes'
        );
      } catch (err) {
        // 兜底：普通链接也能打开
        document.location.href = 'batch_tool.html';
      }
    });
  });
})();