function right(e) {
	var msg = "Boton derecho no permitido...";
		if (navigator.appName == 'Netscape' && e.which == 3) {
			alert(msg);  // Delete this line to disable but not alert user
			return false;
		}
		else if (navigator.appName == 'Microsoft Internet Explorer' && event.button==2) {
			alert(msg); // Delete this line to disable but not alert user
			return false;
		}
	return true;
}
document.onmousedown = right;