var imgFauna3a = new Image(252,144);
var imgFauna3b = new Image(252,144);
var imgFauna3c = new Image(252,144);

imgFauna3a.src = "Fauna3a.jpg"
imgFauna3b.src = "Fauna3b.jpg"
imgFauna3c.src = "Fauna3c.jpg"

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