Hi friend as yahoo geocities and googlepages closed You can check for list to upload these files here http://anshuldudeja.blogspot.com/2009/05/where-upload-js-files-free-javascript.html
google pages/ google docs/ geocities (yahoo), I would suggest you not to upload it on any free servers...
too old post raised again ) Well, if still the thread starter is in need of solution, you can upload your Javascript files directly in your template. I wrote a post long ago, Look it here, you will find whatever you need http://www.ialwayscapital.com/2009/05/alternatives-of-google-pages-file.html