Javascript - Can't run Javscript files - main.js, jquery.min.js etc...

Javascript - Can't run Javscript files - main.js, jquery.min.js etc...

Hi,

I put the following code in my site and it disappears:

<!-- Scripts -->
            <script src="assets/js/jquery.min.js"></script>
            <script src="assets/js/skel.min.js"></script>
            <script src="assets/js/util.js"></script>
            <!--[if lte IE 8]><script src="assets/js/ie/respond.min.js"></script><![endif]-->
            <script src="assets/js/main.js"></script>


I put the files where they are supposed to go and the code does not work. Why is it not possible? I built a scroll menu and a HTML5 responsive site.

I would like to load the Javascript but it is not letting me and I don't understand why.