function right(e) {
if (navigator.appName == 'Netscape' &&
(e.which == 3 || e.which == 2))
return false;
else if (navigator.appName == 'Microsoft Internet Explorer' &&
(event.button == 2 || event.button == 3)) {
alert("Sorry, you cannot right click the browser.");
return false;
}
return true;
} 

// un comment these lines to make this work: interactive66.com  
//document.onmousedown=right;
//document.onmouseup=right;
//if (document.layers) window.captureEvents(Event.MOUSEDOWN);
//if (document.layers) window.captureEvents(Event.MOUSEUP);
//window.onmousedown=right;
//window.onmouseup=right;