With the release of Internet Explorer 5 and also Netscape 6.1, the no-right-click scripters have a new event to strike fear into the hearts of Internet users everywhere: document.oncontextmenu.
Whereas traditional right-click scripts captured document.onmousedown and .onmouseup, which can be circumvented by holding down clever combinations of mouse buttons to confuse the browser, or by pressing the Windows key, this event is specifically tailored to control the context menu.
document.oncontextmenu = new Function('return false');
Luckily, most no-right-click scripts as yet have yet to be updated to support the new browsers and are therefore able to be circumvented. Thank goodness for antiquated reference materials...