var imgObjets2a = new Image(252,144);
var imgObjets2b = new Image(252,144);
var imgObjets2c = new Image(252,144);

imgObjets2a.src = "Objets2a.jpg"
imgObjets2b.src = "Objets2b.jpg"
imgObjets2c.src = "Objets2c.jpg"

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