Tyr had the solution all along, however, what you'll need to do is save over the original image itself, usually as a gif or high-resolution PNG, using his method. I've seen this done before, however the large loophole is that the watermark/highlight will not show up on firefox. However, the image will still carry the watermark, unbeknowst to the rippers, so when they open it in *enter vector program here*, it can be seen in the index.

According to my knowledge, this is the most surefire way to protect your images.

ugh... the endless debate...

any image is takable.
show me one that is protected and i can show you how to get it.
these days, if someone really wants to get an image, they will.
every prevention has at least one way around it.
the only way to keep your image is to not post it on the internet.

visible watermarks are a deterrent, but not a prevention.

Not really i mean if you can't right click on something theres no way to get it

Not really i mean if you can't right click on something theres no way to get it
sure there is.
Print Screen and Screen Capture are two easy ways around non-right click.