/* disabilita il tasto destro del mouse */
document.oncontextmenu = nocontextmenu; 
document.onmousedown = norightclick; 
if (window.Event) 
document.captureEvents(Event.MOUSEUP); 

function norightclick(e) 
{ if (window.Event) 
{ if (e.which == 2 || e.which == 3) 
{ return false; } 
} 
else 
{ if (event.button == 2 || event.button == 3) 
{ event.cancelBubble = true 
event.returnValue = false; 
return false; 
} 
} 
} 
function nocontextmenu() 
{ event.cancelBubble = true 
event.returnValue = false; 
return false; 
}