How to restrict the user from copy the image in webpage?

I know there is a way, but trust me it isn't easy... I look and see if I can find that page again for you.

I am not sure how to answer your question. I am sure there is a way though! I know I publish a lot using adobe and there are settings that restrict what a viewer can do. However, I would suggest that you put a copyright notice up. That way if someone does use your material you are covered legally. They may still do it, but not legally.