Where from these files can be downloaded.
Please post download links
Have you googled them? Most JS libraries have their own site with download links. E.g. http://prototypejs.org/
Can you please post download links of these files separately?
I searched with file names…but not able to find those.
You are better off not downloading those files and just link to them at a common hosted location instead.
Sometimes, when you are given a download link ( such as with jQuery), you get taken to a big page of code. You are expected to copy the code on that page and paste it into your own file (which you can name anything you like).