var imgNudes4a = new Image(252,144);
var imgNudes4b = new Image(252,144);
var imgNudes4c = new Image(252,144);

imgNudes4a.src = "Nudes4a.jpg"
imgNudes4b.src = "Nudes4b.jpg"
imgNudes4c.src = "Nudes4c.jpg"

function show(imgPainting){
  //copy the value to the display image
  document.imgNudes.src = imgPainting.src;
}