Navigation Top

Add class (navbar-fixed-top) to class (navbar) and

Add class (init-content-top) to class (init-content) to use top navigation like this:

<html lang="en">
  <body>
    <div class="init-wrapper">
      <nav class="navbar navbar-default navbar-fixed-top init-top-header">
        <!-- Top bar -->
      </nav>
      <div class="init-left-sidebar">
        <!-- Left sidebar -->
      </div>
      <div class="init-content init-content-top">
        <!-- Main content -->
      </div>
      <div class="init-right-sidebar">
        <!-- Right sidebar -->
      </div>
    </div> 
  </body>
</html>