Codes and tips for disabling right mouse button clicks have been many on this forum. This little review is to let you know just how useless such codes are.
The right click function on your mouse displays features that are available in the top menu on all browsers. I am sure you have by now already worked it out.
The right click can be disabled but all of those options are still freely available in the top menu.
In the case of protecting your pictures. They cannot be saved from the top menu but the 'View Source' or 'View Page Source' option can be selected.
By viewing the source code of your page users can find out the web address where picture is located, type that address into their browser and yup.. you guessed it... the picture will appear in a new browser window which does not include the disable right click code thereby allowing the person to right click and save the pic.
Throw your disable right click code in the bin, it really is just adding to the file size of your pages.