ns4 = (document.layers) ? true:false 
ie4 = (document.all) ? true:false 
ng5 = (document.getElementById) ? true:false 

function menuShow(name) {
   if (ng5)
  		document.getElementById(name).style.visibility = "visible"
   else if (ns4)
	   document.name.visibility = "show" 
   else if (ie4)
	   name.style.visibility ="visible"
}
function menuHide(name) {
   if (ng5)
  		document.getElementById(name).style.visibility = "hidden"
   else if (ns4)
	   document.name.visibility = "hide" 
   else if (ie4)
	   name.style.visibility ="hidden"
}