Well, for maximum compatibility, you want to avoid every technology.

But right now it looks like you're using a flash app (SimpleViewer) to do your photo browsing in some of your galleries, which although not maximum compatible, it is actually good in a certain way: It discourages people from doing a right-click and SAVE IMAGE AS on your copyrighted work. Sure there are ways to gank the photos without that feature, but not everyone out there knows what to do after pressing the printscreen key.

Maybe there's a way to get the flash app to put a watermark on the images or a "copyright Cris Matthews" message in the corner of every image?

I notice the flash app is only active for some of the galleries, not all, and I would recommend doing them for all.