hey jenn29,
As far as I can tell, this is done in javascript and is pretty easy to get around regardless. There is a faq file in the Javascript Forum FAQ's section ( faq216-220 ) that contains the code needed to disable right click. Keep in mind anyone can access your files through Saving your webpage or through their browser Cache files and there is nothing you can do about it. However, Check the faq if you want to disable the right click. Hope this helps.
Tim