if (document.images)
{
  var img = new Image;

  img.src = "images/usaf.gif";
  img.src = "images/usarmy.gif";
  img.src = "images/uscg.gif";
  img.src = "images/usmc.gif";
  img.src = "images/usnavy.gif";
  img.src = "images/formil.gif";
  img.src = "images/commcivair.gif";
  img.src = "images/jetteams.gif";
  img.src = "images/airshows.gif";
  img.src = "images/warbirds.gif";
  img.src = "images/fastattack.gif";

}

function swapimg(img, name)
{
  if (document.images)
    document.images[name].src=img;
}