Well here's a really simple script that you can use to block all access to the context menu (not just from the right mouse button but from the keyboard as well) and really annoy your visitors. The script is even simpler than most of the ones that only block the mouse button and works in about as many browsers as those scripts do. Here's the entire script for you.
Adding just that small piece of code to the body tag of your web page is more effective at blocking your visitor's access to the context menu than the many no right click scripts that you can find elsewhere on the web because it blocks access from both the mouse button and the keyboard options described above.
Of course the script doesn't work in all web browsers (eg Opera ignores it - but then Opera ignores all of the no right click scripts as well). It also does nothing to prevent your visitors from accessing the page source using the View Source option from their browser menu, from saving the web page and viewing the source of the saved copy in their favourite editor, or from using a View Source Bookmarklet.
Also, when the context menu has been disabled like this it can be easily re-enabled by typing javascript:void oncontextmenu(null) into the address bar of the browser.
