if (document.layers){
window.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP)
window.onmousedown=rightclick;
window.onmouseup=rightclick;
function rightclick(e) {
if (e.which == 3) {
// Put right mouse code here
alert('Rechte Maustaste gesperrt !!!  ');
return false; 
}
else {
return true; 
}
}
}
if (document.all){
function click() {
if (event.button==2) {
alert('Funktion nicht verfügbar !!!  ')
}
if (event.button==3) {
alert('Funktion nicht verfügbar !!!  ')}
}
document.onmousedown=click
}
function DoFalse(e)
{
 if((window.event && window.event.ctrlKey == true) || 
    (e && e.modifiers == 2))
 {
  alert('Nicht möglich!'); return false;
 }
}

if(document.layers)
{
 document.captureEvents(Event.KEYPRESS);
 document.onKeyPress = DoFalse;
}