function showWatermark(image)
{
  if (image == '')
  {
    return false;
  }
  
  var e = $('watermarkHover');
  e.style.backgroundImage = "url('" + image + "')";
  Effect.Appear('watermarkHover', { duration: 0.5 });
}

function hideWatermark()
{
  var e = $('watermarkHover');
  e.style.display = 'none';
}