code: function (name, value, cursor, single) {
        if (value) {
          if (! htracr.ui.urls[name]) {
            ui.urls[name] = {};
          }
          if (single === true) {
            ui.urls[name][value] = cursor;
          } else {
            if (! ui.urls[name][value]) {
              ui.urls[name][value] = [];
            }
            ui.urls[name][value].push(cursor);
          }
        }
      }
docs: save the cursor location for a named value