var message='No right Click please';
function click(e) {
 if (document.all) {
  if (event.button == 2) {
   alert(message);
return false;
 }}
 if (document.layers || navigator.appName=='Netscape') {
 if (e.which == 3) {
   alert(message);return false;
}}}
if (document.layers) {
 document.captureEvents(Event.MOUSEDOWN);
}
if (document.layers){
 document.captureEvents(Event.SHIFT_MASK);
}
document.onmousedown=click;