function showbanner() {
  m = 0, x = 0, y = 0;
  ad  = new Array();
  adv = new Array();
  hit = new Array();

  hit[0] = 1; adv[0] = '<a href="http://click-count.info/?m=adn_sk03" target="_blank"><img src="http://www.worldadult-videos.info/adn/160_340_01.jpg" /></a>';
  hit[1] = 1; adv[1] = '<a href="http://click-count.info/?m=adn_os03" target="_blank"><img src="http://www.worldadult-videos.info/adn/160_340_02.jpg" /></a>';
  hit[2] = 1; adv[2] = '<a href="http://click-count.info/?m=adn_sr03" target="_blank"><img src="http://www.worldadult-videos.info/adn/160_340_03.jpg" /></a>';

  for(i=0; i<=hit.length - 1; i++) {
    m += hit[i];
  }
  n = Math.floor(Math.random() * m);
  n++;
  for(i=0; i<=hit.length - 1; i++) {
    x = y;
    y += hit[i];
    if(x<n && n<=y) ad = adv[i];
  }
  document.write(ad);
}