var nr = parseInt(Math.random()*3) + 1;
var src = "/nav/img/puzzel" + nr + ".jpg";
var preload = new Image;
preload.src = src;

function initPuzzel () {

  if (onLoadInitRotate == 1) {
     initRotate();
  }
  
  var puzzel = document.getElementById("puzzel");
  puzzel.src = src;
  
}

window.onload = initPuzzel;