distro_switch.html

<div id="distro-switch" class="btn-group btn-group-justified" data-toggle="buttons">
  {% for distro in site.distros %}
    <label id="{{ distro }}-option" class="distro-button btn btn-xs {% if page.available_distros[distro] %}btn-primary{% else %}btn-default{% endif %}" href="#{{ distro }}" data="{{ distro }}">
      <input type="radio" name="options" id="{{ distro }}-radio" autocomplete="off"> {{ distro }}
    </label>
  {% endfor %}

  <!-- Older distros -->
  <div class="btn-group dropdown">
    <label type="button" class="btn btn-xs dropdown-toggle {% if page.n_available_older_distros > 0 %}btn-primary{% else %}btn-default{% endif %}" data-toggle="dropdown" id="older-distro-button">
        <input type="radio" name="options" autocomplete="off">
      <span id="older-label">Older</span>
      <span class="caret"></span>
    </label>
    <ul class="dropdown-menu" role="menu">
      {% for distro in site.old_distros %}
        <li data="{{ distro }}" id="{{ distro }}-option" class="{% unless page.available_older_distros[distro] %}disabled{% endunless %} older-distro-option"  href="#{{ distro }}">
          <a href="#{{ distro }}" data="{{ distro }}" id="{{ distro }}-button">{{ distro }}</a>
        </li>
      {% endfor %}
    </ul>
  </div>
</div>