I have an iMac OSX version10.3. How would I go about enabling java?
You'll find a lot of things aren't supported with 10.3 at this point, but Java shouldn't be one of them. Still, you should try getting up to at least 10.5 if you can.
Having said that, I'd try out these instructions:
The download link still works and it just might work for you. I don't have a 10.3 machine to test on, so let me know!
It can get expensive to upgrade a little expensive to upgrade, but definitly worth it. He should be able to upgrade, unless he does not have a DVD drive. You have to use XPF in that case.
I keep some older OS X machines around for testboxes, and I am too cheap to upgrade them :-)
OS X has Java installed and enabled by default. Have your tried to update the machine, Apple has had alot of trouble with Java. The are few update available for OS X 10.3 that fix some Java issue.