JamesR - 7:10 pm on Jan 6, 2004 (gmt 0)

Here are a couple of right click disable scripts:

[dynamicdrive.com...]
[learnxpress.com...]

This may frustrate your thieves enough to move on to someone else. Since they are stealing, they are usually lazy by nature and may not bother finding the image in your source.

You can also try digitally watermarking all your images to show ownership and then sending cease and desist letters to violaters. It is actually amazing how many webmasters don't know this is wrong or just don't think anyone will do anything about it.