nextPage = () => new Promise((resolve => {
  $('[data-role=next]').click();
  $(document).one("ajaxComplete", () => {
    resolve()
  })
}));

findElements = () => $("#J-detail-container tr[rid]").filter((i, e) => e.children[2].innerText.match(/常州/) && e.children[1].innerText.match(/大娘水饺/));
goOnline = () => findElements().each((i, e) => $(e).find('.J_online').click());
goOffline = () => findElements().each((i, e) => $(e).find(".J_offline").click());