one thing i see is that you have <BODY> content in the <HEAD> - all visible elements should be in the <BODY> - only metadata belongs in the <HEAD> - i dont know if that is the problem; but i would change that, regardless
secondly, the web-labels link is pointing to a directory, not a file - the web-labels are actually in a file named index.html - i would put it in a file named javascript.html or web-labels.html - i would just put that file in the root dir; but if you must have an entire directory for that one file, then make the link like: 'javascript/web-labels.html'
