jQuery and Bootstrap cdn library, załączanie jquery i bootstrap
<!-- jquery.js -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js" type="text/javascript"></script>
<!-- bootstrap.js -->
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js" type="text/javascript"></script>