function reloadImage(img) {
  var src = img.src;
  var iframe = document.createElement('iframe');
  iframe.onload = function() {
    iframe.onload = function() {
      // clean up properly
      document.head.removeChild(iframe);
      iframe.onload = function() {};
      iframe = null;
      // reload
      img.src = src;
    };
    iframe.contentWindow.location.reload(true);
  };
  iframe.src = src;
  document.head.appendChild(iframe);
}