function showLayer(a)
{
  var a = document.getElementById(a);
  a.className = "ShowLayer";

  return true;
}

function hideLayer(x)
{
  var x = document.getElementById(x);
  x.className = "HideLayer";

  return true;
}

function showLayer3(a)
{
  var a = document.getElementById(a);
  a.className = "ShowLayer3";

  return true;
}

function showLayer4(a)
{
  var a = document.getElementById(a);
  a.className = "ShowLayer4";

  return true;
}

function showLayer5(a)
{
  var a = document.getElementById(a);
  a.className = "ShowLayer5";

  return true;
}

function showLayer6(a)
{
  var a = document.getElementById(a);
  a.className = "ShowLayer6";

  return true;
}