Yes there are tons of javascript code you can use. But I really don't think you should waste your time with it. If someone wants your image bad enough they can always do a "PrintScreen" and import that into Photoshop and crop it. If you are interested just look around for some javascript code. The stuff I found before don't work in Mozilla though for blocking people. So I don't know if its really worth it for you to spend that time to do it. But that's for you to decide of course.
Thanks for the great info! Your right though, I'm not sure its worth going through all that trouple when people can do print-screen. However, I will be using the codes on a few pictures, just in case.
Indeed. I am just saying I would spend tons of time blocking people from doing it, but if you use that Javascript on that page then that would be a quick way to stop most people. Glad that thread helped!