var Meldung = "Copyright Anke Rohn\nund Peter Maas";

var Version = parseInt(navigator.appVersion);
var Netscape = navigator.appName.indexOf("Netscape");
var IE = navigator.appName.indexOf("Internet Explorer");

if (Netscape == -1)
  Netscape = false;
 else
  Netscape = true;

if (IE == -1)
  IE = false;
 else
  IE = true;


function Mausknopf(dummy)
  {
    if (Netscape && dummy.which > 1)
      {
        alert(Meldung);
        return false;
      }
     else
      if (IE && (event.button > 1))
        {
          alert(Meldung);
          return false;
        }
  }

document.onmousedown = Mausknopf;

if (document.layers)
  window.captureEvents(Event.MOUSEDOWN);

if (Netscape && Version < 5)
  window.onmousedown = Mausknopf;