function right(x) {
     if (navigator.appName == 'Netscape' && (x.which == 3 || x.which == 2))
        {
          alert("NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO ! NO ! NO !NO ! NO !...");
          return false;
        }
else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) 
        {
          alert("NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO !NO ! NO ! NO ! NO !NO ! NO !..");
          return false;
        }
return true;
}
document.onmousedown=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=right;