function MK_swapImage(target,src) { 

 var NN4_layerPath;
 if (arguments.length > 2 && document.layers) {
  NN4_layerPath = "";
  for (i=2; i<arguments.length; i++) NN4_layerPath += 'document.layers["' + arguments[i] + '"].';
  eval(NN4_layerPath + 'document.images["' + target + '"]').src = src;
  return;
 }
 document.images[target].src = src;
}