     <option value='barebones'>Barebones</option>
          <option value='bootstrap3'>Bootstrap 3</option>
          <option value='bootstrap4'>Bootstrap 4</option>
          <option value='bootstrap5'>Bootstrap 5</option>
          <option value='html'>HTML</option>
          <option value='spectre'>Spectre</option>
        </select>
      </div>
      <div>
        <label for="iconlib_switcher">iconlib</label>
        <select id="iconlib_switcher" name="iconlib" class="form-control browser-default">
    