tn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
      Launch demo modal
    </button>
  </div><!-- /example -->
{% highlight html %}
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div cl