Yes there is. But….
The right click is disabled using javascript. If a visitor disables js they can still use right click.
You will need a different script for FF and IE.
A user can still use PrintScreen to grab your images.
In other words… it’s not worth the trouble. If you want to protect your images you are much better off using a watermark on them.
Having said that if you still want to disable right click just do a google search for ‘disable right click’ and to add the script to your site go to Admin>extensions>template manager>ja_avian>edit HTML and add the script immediately before the </head> tag.