<div id="container" class="variable-sizes">
  {% assign page_position = page.page_position %}
  {% for element in site.elements limit:20 offset:page.page_position %}
    {% include element-partial.html %}
  {% endfor %}
</div>

<script src="../{{ site.jquery_js }}"></script>
<script src="../{{ site.isotope_js }}"></script>
<script>
  $(function(){
    
    var $container = $('#container');
    
    $container.isotope({
      itemSelector : '.element',
      layoutMode : 'fitRows'
    });
    
  });
</script>