sS hCheckBoxMultiSelect_v2(O... _) {

  optPar bool verbose;

  ret hscript(replaceDollarVars([[

    var lastChecked;

    $(document).ready(function() {

      console.log("document ready");

      $("input[type=checkbox]").click(function(e) {

        var verbose = $verbose;

        var cls = this.className;

        if (verbose) console.log("cls=" + cls);

        if (!cls) return;

        if (!lastChecked || lastChecked.className != cls) {

          lastChecked = this;

          return;

        }

        var $chkboxes = $('input[type=checkbox].' + cls);

        if (e.shiftKey) {

          var start = $chkboxes.index(this);

          var end = $chkboxes.index(lastChecked);

          // change checkboxes, trigger their change event in case there are handlers installed

          $chkboxes.slice(Math.min(start, end), Math.max(start,end)+1).prop('checked', lastChecked.checked)

            .each(function(idx, chkbox) {

              chkbox.dispatchEvent(new Event('change'));

            });

        }

        lastChecked = this;

      });

    });

  ]], +verbose));

}