Hello,

I'm not really too sure that you can do this.

Some other solutions you can do is doing some counter measures to protect the image you want to display w/out using some sort of authentication method.

Such as hotlinking and using a transparent .gif image to cover up the image your displaying--that way they can't right click and save.

Also if someone views your source to grab the SRC of the image, you may need to do some config on your server to handle images as documents , that way they can't copy the SRC, put it in the browser, then click save as.

Heres a good article that I read on this topic.

http://xoops.tedmasterweb.com/modules/articles/print.php?id=5

Thank you, perleager