That will only stop computer newbs from lifting your work. Most right-click disablers don't work, cause if you hold down the left click mouse and then right click while holding down left click, it overrides the disable right click script, most of them, some this doesnt work. Also, all you have to do is select all the text and go to edit>copy and then just paste in notepad or whatever.
If I were you, I would protect images by putting a watermark on them, if they are your original work. And if you want to protect your text, use one of those copy protection sites where you can search for other sites that are using your text verbatim.