Refresh images

 <script>
  setInterval(function() {
    var images = document.getElementsByTagName('img');
    for(var i = 0; i < images.length; i++) {
      var image = images[i];
      var source = image.src;
      if( source.indexOf('?') != -1 ) {
        source = source.substring(0, source.indexOf('?'));
      }
      image.src = source + '?' + Math.floor(Math.random()*1000000);
    }
  }, 60000);
 </script>