var mess="Questo è un sito di informazioni in forma dimostrativa e sperimentale";
document.onmousedown=right;
document.onmouseup=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (document.layers) window.captureEvents(Event.MOUSEUP);
window.onmousedown=right;
window.onmouseup=right;function right(e)
{
if (navigator.appName=='Netscape')
{
   if (e.which == 3 || e.which == 2)
	return false;
}
else
{
   if (event.button==2 || event.button==3)
	{
	alert (mess);
	return false;
	}
   if (event.button==1 && (event.shiftKey || event.shiftLeft ))
	{
	alert (mess);
	return false;
	}
}
}