Bootstrap Dropdowns

<div class="dropdown">
  <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
  <span class="caret"></span></button>
  <ul class="dropdown-menu">
    <li><a href="#">HTML</a></li>
    <li><a href="#">CSS</a></li>
<li class="divider"></li>
<li class="dropdown-header">Dropdown header 1</li>
    <li><a href="#">JavaScript</a></li>
<li class="disabled"><a href="#">CSS</a></li>
<li class="active"><a href="#">HTML</a></li>
<ul class="dropdown-menu dropdown-menu-right">
  </ul>
</div>