function enlarge_image(url, imageid, caption)
{
  show_full_image(url, imageid);
  set_image_caption(imageid, unescape(caption));
}

function set_image_caption(imageid, caption)
{
  myImage = document.getElementById(imageid);
  
  if (myImage)
  {
    myImage.setAttribute("alt", caption);
    myImage.setAttribute("title", caption);
  }
}