function revolveImageFirst(rev_images,img_id,time) {
  var Timer = setTimeout(function () {revolveImage(rev_images,1,img_id,time)},time);
}
function revolveImage(rev_images,pos,img_id,time) {
  if (document.getElementById(img_id)) {
    rev_img = document.getElementById(img_id);
    
    rev_img.src = rev_images[pos];
    if (rev_images.length-1>pos) pos++;
    else pos = 0;
  }
  var Timer = setTimeout(function () {revolveImage(rev_images,pos,img_id,time)},time);
}