I would never say it was a fool-proof way. But most of the people who steal images are either not very knowledgable or else not motivated enough to bother trying to find alternate ways to get images.  BTW, you can also use JS to disable the "view source" command, which adds another level of difficulty to the issue at hand.  I don't bother with JS at all, because I'm perfectly happy with my pages as it is, but my sister gets really upset when some kid (usually an aoler) steals her pictures and puts them on their own website without any reference and without asking permission.  For most of these kids, it's enough to protect the page with JavaScript.  But like I said, nothing can protect from a truly determined site-theif except to not put the pictures online at all.


Jennifer