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("Mouse destro disabilitato")
	return false;
	}
}
 document.onmousedown=right;