<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <nav class="navbar navbar-default" role="navigation"> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li><a href="#">Separated link</a></li> <li class="divider"></li> <li><a href="#">One more separated link</a></li> </ul> </li> </div><!-- /.navbar-collapse --> </nav> </div> </div>

.caret-up { width: 0; height: 0; border-left: 4px solid rgba(0, 0, 0, 0); border-right: 4px solid rgba(0, 0, 0, 0); border-bottom: 4px solid; display: inline-block; margin-left: 2px; vertical-align: middle; }

$(function(){ $(".dropdown").hover( function() { $('.dropdown-menu', this).stop( true, true ).fadeIn("fast"); $(this).toggleClass('open'); $('b', this).toggleClass("caret caret-up"); }, function() { $('.dropdown-menu', this).stop( true, true ).fadeOut("fast"); $(this).toggleClass('open'); $('b', this).toggleClass("caret caret-up"); }); });