// Java Document

function showlayer(layerName)
{if (document.getElementById) // Netscape 6 and IE 5+
     {var targetElement = document.getElementById(layerName);
          targetElement.style.visibility = 'visible';}
}
function hidelayer(layerName)
{if (document.getElementById) 
    {var targetElement = document.getElementById(layerName);
         targetElement.style.visibility = 'hidden';}
}