function showImage(thumbnail)
{
  try
  {
    var elem;
    div = document.getElementById('LargeImageHolder');
    img = document.getElementById('LargeImage');
    if (div != null)
    {
      div.style.display = "block";
    }
    if ((img != null) && (thumbnail != null))
    {
      img.setAttribute("src", thumbnail.getAttribute("src").replace(/.jpg/i,'-large.jpg'));
    }
  }
  catch(error)
  {
    alert(error);
  }
}

function closeImage()
{
  try
  {
    var div;
    div = document.getElementById('LargeImageHolder');
    if (div != null)
    {
      div.style.display = "none";
    }    
  }
  catch(error)
  {
    alert(error);
  }
}