function showResourceList(listName) {

  var curLists = new Array ('disciplinesList','levelsList');
  for (var i=0; i<curLists.length; i++) {
    document.getElementById(curLists[i]+"Link").className = "tanArrow";
    var list = document.getElementById(curLists[i]).className = "hiddenTRList";
    }

  document.getElementById(listName+"Link").className = "redArrow";
  document.getElementById(listName).className = "showTRList";
  return;
  }