Context Menu Override
A quickie ... if you should want or need to override the context menu that appears on right-click of a Web page, just do this:
<body oncontextmenu="return false;">
I've done this on the present page - go ahead and right-click. Nothing happens.
I've seen some references where it was claimed to be a way to prevent users from printing out a page, stealing the graphics, prevent the user from navigating backward, etc. But that's just a jerk-hurdle.