function showWhy ()
{
  hideAllMenus();
  var menu = document.getElementById("whyMenu");
  menu.style.display = "block";
}

function showDental ()
{
  hideAllMenus();
  var menu = document.getElementById("dentalMenu");
  menu.style.display = "block";
}

function showMedical ()
{
  hideAllMenus();
  var menu = document.getElementById("medicalMenu");
  menu.style.display = "block";
}

function showSupport ()
{
  hideAllMenus();
  var menu = document.getElementById("supportMenu");
  menu.style.display = "block";
}

function showVeterinary ()
{
  hideAllMenus();
  var menu = document.getElementById("veterinaryMenu");
  menu.style.display = "block";
}

function hideAllMenus()
{
  var menu = document.getElementById("dentalMenu");
  menu.style.display = "none";
  menu = document.getElementById("medicalMenu");
  menu.style.display = "none";
  menu = document.getElementById("supportMenu");
  menu.style.display = "none";
  menu = document.getElementById("whyMenu");
  menu.style.display = "none";
  menu = document.getElementById("veterinaryMenu");
  menu.style.display = "none";
}