protect all pics of message board with javascript

[ptbyjason]

I know there is a way to add javascript to a website so that it protects the images you have on there (visitor cannot right click and save the image). Is there anyway to add it to a site so that you can protect the pictures that people post. There might also be a way that you can use it to protect buttons, logos, avatars, etc...... But I am mainly interested in protecting posted pics.