function showGalleryA()
{
  var a = document.getElementById("gallery-a");
  var b = document.getElementById("gallery-b");
  b.style.display = "none";
  a.style.display = "block";
}

function showGalleryB()
{
  var a = document.getElementById("gallery-a");
  var b = document.getElementById("gallery-b");
  a.style.display = "none";
  b.style.display = "block";
}

function doSetup()
{
  if (this == document.getElementById("objectgallery"))
    showGalleryA();
  else
    showGalleryB();
}