var curPict = 0;
function pictNavL(maxNo) {
   curPict--;
   if (curPict < 0)
      curPict = maxNo - 1;
   pictChange();
}
function pictNavR(maxNo) {
   curPict++;
   if (curPict >= maxNo)
      curPict = 0;
   pictChange();
}
function pictChange() {
   for (idx = 0; idx < document.images.length; idx++) {
      if (document.images(idx).type == "prodImg") {
          if (parseInt(document.images(idx).id) == curPict) {
             document.images(idx).style.visibility = "visible";
             document.all("ProdPicTag").innerText = document.images(idx).name;}
          else {
             document.images(idx).style.visibility = "hidden";}
      }
   }
}