function right(e) {
     if (navigator.appName == 'Netscape' && 
     (e.which == 3 || e.which == 2)){
     alert("Bitte die linke Maustaste benutzen!!!");
     return false;
	 }
     else if (navigator.appName == 'Microsoft Internet Explorer' && 
     (event.button == 2 || event.button == 3)) {
     alert("Bitte die linke Maustaste benutzen!!!");
     return false;
     }
     return true;
     }
     document.onmousedown=right;
     if (document.layers) window.captureEvents(Event.MOUSEDOWN);
     window.onmousedown=right;