docs/_includes/navbar.html

<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
  <div class="container">
    <div class="row">
      <div class="col-md-1 af-mobile-nav-bar">
	<a href="{{ site.baseurl }}index.html" title="Home">
	  <img class="hidden-xs hidden-sm img-responsive"
	       src="{{ site.baseurl }}img/logo.png" alt="Apache Flink Logo">
	</a>	
	<div class="row visible-xs">
	  <div class="col-xs-3">
	    <a href="{{ site.baseurl }}index.html" title="Home">  
	      <img class="hidden-x hidden-sm img-responsive"
		   src="{{ site.baseurl }}img/logo.png" alt="Apache Flink Logo">
	    </a>	
	  </div>
	  <div class="col-xs-5"></div>
	  <div class="col-xs-4">
	    <div class="af-mobile-btn">
	      <span class="glyphicon glyphicon-plus"></span>
	    </div>
	  </div>
	</div>
      </div>
      <!-- Navigation -->
      <div class="col-md-11">
	<div class="collapse navbar-collapse" id="navbar-collapse-1">
	  <ul class="nav navbar-nav">

	    <li>
	      <a href="index.html" class="{% if page.url contains 'index.html' %}active{% endif %}">Documentation</a>
	    </li>

	    <li>
	      <a href="api/java/index.html">Javadoc</a>
	    </li>

	    <li>
	      <a href="api/scala/index.html#org.apache.flink.api.scala.package">Scaladoc</a>
	    </li>

	  </ul>
	</div>
      </div>
    </div>
  </div>
</nav>