Hello again Archangel!

I wanted to thank you again for helping me out earlier. My newest question will probably be a piece of cake for you. It doesn't have anything to do with programing. I've noticed that I have no trouble viewing any of the applets I make. Yet when I have some of my friends check it out to help me debug, a few of them just get a grey box. Is ther something from Sun that I need to have them download and install so that the applets will work for them? Thanks.