Javascript doesn't work after moving installation

I've installed CodeIgniter on a shared hosting without ssl certificate, which worked perfectly fine. Today I've moved the installation to the private_html directory. This works as one would expect, all files are loaded fine, and work as they should, but the javascript files don't seem to work. The files are correctly loaded, but they don't do anything (which I find very strange). Does anyone recognize the problem and know the solution?

Regards, Folkert