There are several products around that promise to protect content from being copied, like http://www.antssoft.com/htmlprotector/ for example. I know that these techniques are not foolproof, but I would still like to implement them on a CMS that I am developing.
Rather than buy such a product however - which may well have practical or licence limitations - I would prefer to implement such copy protection directly. How do I do that though? There seems to be more than JS involved.