Java problem

Paul C

Whenever I use Firefox to view any Java enabled sites it says I need to install the Java pluggin, so I use the Firefox update but it says their is no Java update available, my machine is bang upto date with Apple software updates and I'm running 10.3.9, I have tried to download Java but I just got a load of files that I'm told to place in the /library/Internet Pluggin folder but that dosen't make any difference.

Help guys. :(