function $(id) {
  return document.getElementById(id);
}

function hide(id) {
  $(id).className = "hidden";
}

function show(id) {
  $(id).className = "unhidden";
}

function showElement(showID,link) {
  show(showID);
  $(link).href = "javascript:hideElement('"+showID+"','"+link+"');";
  $(link).innerHTML = "Hide Summary";
}

function hideElement(hideID,link) {
  hide(hideID);
  $(link).href = "javascript:showElement('"+hideID+"','"+link+"');";
  $(link).innerHTML = "View Summary";
}