var animQty = 0;
var anims = new Array();
var inc = 0;

function newAnim () {

  animNb = anims.length;
  anims[animNb] = new Array();
  for(var iImg = 0; iImg < arguments.length; iImg++) {
    anims[animNb][iImg] = new Image();
    anims[animNb][iImg].src = arguments[iImg];
  }
  document.write('<img name="anim'+ animNb +'" src="'+ arguments[0] +'" alt="anim'+ animNb +'" />');
}

function animates () {
  inc++;
  for(var iAnim = 0; iAnim < anims.length; iAnim++) {
    document["anim"+ iAnim].src = anims[iAnim][inc%anims[iAnim].length].src;
  }
}

setInterval(' animates();', 3000);

/** example **/
// <script>
//   newAnim("path_images1.jpg", "path_images2.jpg", "path_images3.jpg", ...);
// </script>