@shellsharks A simple page explaining that all the JavaScript code is under such-and-such license would suffice. Machine-readable licenses would be neat, but I just need to know if all the JS on the site has a free software license. Sorry for the confusion.
If you're a trooper and really want to go the machine-readable licenses route, have a look at https://www.gnu.org/software/librejs/free-your-javascript.html
Thanks.