There isn't a single image on that site that can't be copied. I saved the first one I saw in the gallery in about 10 seconds. It simple is not possible to prevent someone from taking any image that in on the internet.

Disabling right click is going to anger/annoy more of your users then it will prevent users whom are trying to steal images. If you don't mind losing visitors there are several posts on the forum with the code you need, as well as the code on sites like dynamicdrive.com

The best defense you have against your images being stolen is to put a watermark on them so people know they came from your site. Even then watermarks can be removed if not placed properly or someone has enough skill to remove the watermark and repair the image.

Simply put, if you don't want an image stolen don't put it on the internet

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