function showLinks(group) {
  document.getElementById("health").style.display = "none";
  document.getElementById("fitness").style.display = "none";
  document.getElementById("general").style.display = "none";
  document.getElementById(group).style.display = "block";
  document.getElementById("healthL").className = "linkOff";
  document.getElementById("fitnessL").className = "linkOff";
  document.getElementById("generalL").className = "linkOff";
  document.getElementById(group+"L").className = "linkOn";
}