var message = "Sorry, you don't have permission to right-click.";


function click(e) {
if (document.all) {
if (event.button == 2) {
alert(message);
return false;
}
}
if (document.layers) {
if (e.which == 3) {
alert(message);
return false;
}
}
}
if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}

document.onmousedown=click;



function onKeyDown() {
  // current pressed key
  var pressedKey = String.fromCharCode(event.keyCode).toLowerCase();

  if (event.ctrlKey && (pressedKey == "c" || pressedKey == "v")) {
    // disable key press processing
    event.returnValue = false;
  }

} 


document.onkeydown=onKeyDown;