static JS js_uploadLiveValues() {
  ret jsRequiringJQuery([[
    function uploadLiveValues() {
      var entries = [];
      $("[data-source][data-update-every]").each(function() {
        entries.push({
          "data-source": $(this).attr("data-source"),
          "data-update-every": $(this).attr("data-update-every"),
          "value": $(this).html()
        });
      });
      var json = {"liveValues": entries};
      wsSend(JSON.stringify(json));
    }
  ]]);
}