function expandFirst() {
      document.getElementById(expandFirst.arguments[0]).style.display = "block";
      for (var i=1; i<expandFirst.arguments.length; i++) {
        document.getElementById(expandFirst.arguments[i]).style.display = "none";
      }
    }
function expandCollapse() {
  for (var i=0; i<expandCollapse.arguments.length; i++) {
    var element = document.getElementById(expandCollapse.arguments[i]);
    element.style.display = (element.style.display == "none") ? "block" : "none";
  }
}