function disableRightClick(e)

{

  var message = "Right click disabled";

  if(!document.rightClickDisabled) // initialize
  {
    if(document.layers) 
    {
      document.captureEvents(Event.MOUSEDOWN);
      document.onmousedown = disableRightClick;
    }

    else document.oncontextmenu = disableRightClick;

    return document.rightClickDisabled = true;
  }

  if(document.layers || (document.getElementById && !document.all))
  {
    if (e.which==2||e.which==3)
    {
     return false;
    }
  }
  else
  {
    return false;
  }
}

disableRightClick();

var key = new Array();
key['n'] = "Deze toetscombinatie is niet toegestaan";

function getKey(keyStroke) {
    isNetscape=(document.layers);
    eventChooser = (isNetscape) ? keyStroke.which : event.keyCode;
    which = String.fromCharCode(eventChooser).toLowerCase();

//     alert(eventChooser);

    for (var i in key)
         if (event.ctrlKey && which == i) {
              confirm(key[i]);
			  
              i=key.length+1;
         }
        

}
document.onkeydown = getKey;