function timeimgsphoto(numb) {
  thetimer = setTimeout("imgturnphoto('" +numb+ "')", 4000);
}

function imgturnphoto(numb) {
  if (document.images) {
    illustro1 = new Image();
    illustro1.src = "image/photo1.jpg";
    illustro2 = new Image();
    illustro2.src = "image/photo2.jpg";
    illustro3 = new Image();
    illustro3.src = "image/photo3.jpg";
    illustro4 = new Image();
    illustro4.src = "image/photo4.jpg";
    illustro5 = new Image();
    illustro5.src = "image/photo5.jpg";
    illustro6 = new Image();
    illustro6.src = "image/photo6.jpg";
    illustro7 = new Image();
    illustro7.src = "image/photo7.jpg";
    illustro8 = new Image();
    illustro8.src = "image/photo8.jpg";
  }
  if (document.images) {
    if (numb == "8") {
      document["illustro"].src = eval("illustro8.src");
      timeimgsphoto('1');
    }
    else {
      document["illustro"].src = eval("illustro" + numb + ".src");
      timeimgsphoto(numb = ++numb);
    }
  }
}