function getFoldername(thisAnchor, oldFoldername) {

  if (oldFoldername == null) {
    oldFoldername = "";
  }
  var newFoldername = prompt ("Enter New Foldername",oldFoldername);
  if (newFoldername == null || newFoldername == "") {
    return false;
  }
  else {
    thisAnchor.href = thisAnchor.href.replace("&retURL=","&newfoldername=" + newFoldername + "&retURL=");
    return true;
  }
}