[SPV]

function loadOK() {
  document.images.myimage.src = this.src;
  setTimeout('updateImage()',5000);
}

function loadERROR() {
  alert('Error update image from '+this.src);
}

function updateImage() {
  var tempImage = new Image;
  tempImage.onload = loadOK;
  tempImage.onerror = loadERROR;
  tempImage.src = 'http://...';
}