function toggle( targetId )
{
  if (document.getElementById)
  {
    var target  = document.getElementById( targetId );

    if (target.style.display == "")
    {
      target.style.display = "none"
    }
    else
    {
      target.style.display = ""
    }
  }
}

function show( targetId )
{
  if (document.getElementById)
  {
    var target  = document.getElementById( targetId );

    target.style.display = ""
  }
}

function hide( targetId )
{
  if (document.getElementById)
  {
    var target  = document.getElementById( targetId );

    target.style.display = "none"
  }
}