var message = "Functie uitgeschakeld!";
function clickIE() { if (document.all) { alert(message); return false; } }
function clickNS(e) { if (document.layers || (document.getElementById && !document.all)) { if (e.which == 2 || e.which == 3) { alert(message); return false; } } }
if (document.layers) { document.captureEvents(Event.MOUSEDOWN); document.onmousedown = clickNS; }
else { document.onmouseup = clickNS; document.oncontextmenu = clickIE; }
document.oncontextmenu = new Function("return false")
document.ondragstart = new Function("return false")
document.onselectstart = new Function("return false")