Javascript filename peculiarity

[spamfiend]

Can anyone perhaps confirm the below:

I did a website that uses some javascript mouseovers, which I'd used before and just basically copied and pasted blocks of text. I uploaded the website onto his windows server and started fretting when things didnt work. When I tried it on my linux server it worked perfectly.

I was stumped cos javascript is supposed to run on the end users browser so the server shouldnt have anything to do with it. After days of "running into a brick wall" I noticed that the filename extension of my javascript file was .jss and all website references was .js

So I changed the filename and all the pages to point to a .js file and it worked.

My question is thus: On a Windows server is the extension of the filename for javascript files important? and can someone else check it out?

THanks