function toggleLinks(id, caller) {
  var links = $(id);
  if(links.className == "hidden") {
    caller.src = "/AcuStaf/Images/open_arrow.png";
    links.className = "";
  }
  else {
    caller.src = "/AcuStaf/Images/closed_arrow.png";
    links.className = "hidden";
  }
}