1. <div class="middle">
2. <p>text here</p>
3. </div>
4. <!-- jQuery -->
5. <script src="js/jquery-2.2.4.min.js"></script>
6. <!-- Bootstrap -->
7. <script src="js/bootstrap.min.js"></script>
9. <script>
10. $(function(){
11. $( ".middle" ).addClass( "selected" );
12. });
13. </script>

But the addclass is not working. Any ideas?