var slide=0

function Billboard() {
   var banner = document.getElementById('banner');
   if (banner != null) {
      banner.src = "http://www.parkwaybaptist.net/church/banner/" + sign[slide++ % sign.length];
      if ("Microsoft Internet Explorer" == navigator.appName) {
         banner.filters(0).Apply();
         banner.style.visibility = "visible";
         banner.filters(0).Play();
      }
      setTimeout('Billboard()', 9000)
   }
}