I was asked through email a while back how to disable right click in a blog or site to protect uploaded pictures. I found a code at DynamicDrive.com by Renigade, which does just that. It’s easy peasy to implement. Just copy and paste the following code immediately below thecode of your template.
Please note that content in your site or blog can still be copied, even with the code, through highlighting the text and hitting CTRL+C in one’s keyboard. While this code against right clicking will not stop a determined and knowledgeable plagiarist, it does discourage the casual copier. Best thing to do is to watermark your images with your site or blog logo/URL, so that people know where they came from.