docs: function(options, select) {
                  if (options.length === 0) {
                      return this.nonSelectedText;
                  }
                  else {
                      var selected = '';
                      options.each(function () {
                          selected += $(this).text() + ', ';
                      });
                      return selected.substr(0, selected.length - 2);
                  }
              }