if (document.layers) {
  document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=clickHandler;
function clickHandler(myEvent) {
  if (((document.all) && (event.button == 2)) || ((document.layers) && (myEvent.which == 3))) {
	alert('Scans property of Cheques in the Mail, Inc. \n Unauthorized duplication is prohibited!!!');
    return false;
  }
}