These two languages are managed through settings called “active scripting”., whereas for java it is different in other browsers.
But if you are too lazy to put forward your step to jot down your own code, all you can do is go to the sites where the authors have put their scripts to be downloaded.
There are numbers of such websites which provides free downloads which states that authors do not have any issue if anyone is using their script.
Whereas you can also find several tutorials in different formats which teaches you how to write your own code.
You have to be careful of getting a new updated version which will serve proper use for your purpose.
If we talk about the older versions still existing which might be of no use for now, we have to understand that it takes time to make those scripts.
The scripts also have to be flexible which can be used in majority of the browsers with ease.
There are scripts which are outdated but still works in many aspects.
Many sites do not write their own scripts, rather they are dependent on someone to write them and upload them on their site.
And that’s why we can still see outdated scripts now. However, they can be still used for various purposes.