var imgs1 = new Array("http://www.journalofprolotherapy.com/banner_ads/banner_ad_5_get_prolo.gif","http://www.journalofprolotherapy.com/banner_ads/banner_ad_3_benuts.gif","http://www.journalofprolotherapy.com/banner_ads/banner_ad_nancy_moore.jpg","http://www.journalofprolotherapy.com/banner_ads/banner_ad_donna_alderman.jpg","http://www.journalofprolotherapy.com/banner_ads/banner_ad_prolo_dvd.jpg");
var lnks1 = new Array("http://www.getprolo.com","http://www.benuts.com","http://www.natural-healing-health.com","http://www.familydoctorpress.com/","http://www.hacketthemwall.org");
var alt1 = new Array("Get Prolo","Benuts for Your Health!","The Cure for Chronic Pain","Free Yourself from Chronic Pain and Sports Injuries","The Hackett Hemwall Foundation");
var currentAd1 = 0;
var imgCt1 = 5;
function cycle1() {
  if (currentAd1 == imgCt1) {
    currentAd1 = 0;
  }
var banner1 = document.getElementById('adBanner1');
var link1 = document.getElementById('adLink1');
  banner1.src=imgs1[currentAd1]
  banner1.alt=alt1[currentAd1]
  document.getElementById('adLink1').href=lnks1[currentAd1]
  currentAd1++;
}
  window.setInterval("cycle1()",4000);