// JavaScript Document

var browserType;

if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
   browserType= "gecko"
}

function hide() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("png")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("png")');
  else
     document.poppedLayer =   
        eval('document.layers["png"]');
  document.poppedLayer.style.visibility = "hidden";
}

function show() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("png")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("png")');
  else
     document.poppedLayer = 
         eval('document.layers["png"]');
  document.poppedLayer.style.visibility = "visible";
}