oxen-observer/templates/include/block_page_controls.html

<div class="pages" class="center" style="text-align: center;">
  {% set top_page = (info.height - 1) // per_page %}
  {% if page > 0 %}
    <a href="/page/{{page - 1}}{{custom_per_page}}">
      <div class="PageButton">Prev</div>
    </a>
  {% else %}
    <div class="PageButton disabled">Prev</div>
  {% endif %}
  <div class="PageButton">
    Current Page: <a title="Return to current blocks" href="/{%if custom_per_page%}page/0{{custom_per_page}}{%endif%}">{{page}}</a>/<a href="/page/{{top_page}}{{custom_per_page}}">{{top_page}}</a>
  </div>

  {%if page < top_page%}
    <a href="/page/{{page + 1}}{{custom_per_page}}">
      <div class="PageButton">Next</div>
    </a>
  {% else %}
    <div class="PageButton disabled">Next</div>
  {% endif %}

  <div class="PaginationControl">
  {% set per_page_options = [5, 10, 20, 25, 50, 100] %}
  {% if not per_page in per_page_options %}
    {{ '' if per_page_options.append(per_page) }}
  {% endif %}
  Showing <select onchange="window.location.href = '/page/0/' + this.value">
    {% for p in per_page_options | sort %}<option{%if p == per_page%} selected="selected"{%endif%}>{{p}}</option>{% endfor %}
  </select> blocks/page
  </div>
</div>