function rollover(img)
{
  var s = new String(img.src);
  img.src = s.replace('_uit', '_aan');
  //alert(s.replace('_uit', '_aan'));
}

function rolloff(img)
{
  var s = new String(img.src);
  img.src = s.replace('_aan', '_uit');
  //alert(s.replace('_aan', '_uit'));
}

function nav(url)
{
  document.location = url;
}


function right(e)
{
  if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2)) return false;
  if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3))
  {
    alert("Sorry deze is tegen het kopiëren beveiligd !");
    return false;
  }
  return true;
}

window.onload = function()
  {
      document.body.onmousedown=right;
      document.body.onmouseup=right;
      if (document.layers) window.captureEvents(Event.MOUSEDOWN);
      if (document.layers) window.captureEvents(Event.MOUSEUP);
      window.onmousedown=right;
      window.onmouseup=right;
  }