<!-- 
var message="De rechtermuisknop is uitgeschakeld!"; 
function click(e) { 
if (document.all) { 
if (event.button == 2) { 
alert(message); 
return false; 
} 
} 
if (document.layers) { 
if (e.which == 3) { 
alert(message); 
return false; 
} 
} 
} 

if (document.layers) { 
document.captureEvents(Event.MOUSEDOWN); 
} 
document.onmousedown=click; 
// -->