var browserType;

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

function showhide(menuid) {
  if (browserType == "gecko" )
     document.poppedLayer = eval('document.getElementById("'+menuid+'")');
  else if (browserType == "ie")
     document.poppedLayer = eval('document.getElementById("'+menuid+'")');
  else
     document.poppedLayer =  eval('document.layers["'+menuid+'"]');
 
  if (document.poppedLayer.style.display == 'none')  document.poppedLayer.style.display = "inline";
  else document.poppedLayer.style.display = "none";

}