var video_thumbs_play_interval;
var video_thumbs_img_id;
var video_thumbs_orig_img;
var video_thumbs_img_dir;
var video_thumbs_img_index;

function video_thumbnails_play()
{
  video_thumbs_img_index++;
  
  if (video_thumbs_img_index > 8) video_thumbs_img_index = 1;
  
  $('#' + video_thumbs_img_id).attr('src', video_thumbs_img_dir + 'thumb-' + video_thumbs_img_index + '.png');
}

function video_start_thumbnails_play(img_item)
{
  video_thumbs_img_index = 0;
  video_thumbs_orig_img = $(img_item).attr('src');
  video_thumbs_img_id = $(img_item).attr('id');
  video_thumbs_img_dir = video_thumbs_orig_img.replace(new RegExp(/thumb-([0-9]*).png/), '');
  
  video_thumbs_play_interval = setInterval('video_thumbnails_play()', 800);
}

function video_stop_thumbnails_play()
{
  clearInterval(video_thumbs_play_interval);
  $('#' + video_thumbs_img_id).attr('src', video_thumbs_orig_img);
}