var isIE = (window.ActiveXObject);	
 
 var browserType;

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

//alert(browserType);

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

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