Yes, I admit that with HTML / JS etc. you'd need to create code for every browser, and I don't know enough about most of them (other than Netscape, IE and Opera) to say if it's possible or not. But if you used Java to display your images then it would be browser-independant anyway, and with a bit of trickery you can prevent anything, including screen-grabs. Not that my stuff is worth the effort. Now, I'm just off to a porn site to do some security research... ;)