<!--
var current="lay1"
if(document.all&&!document.getElementById)document.getElementById=new Function("id","return document.all(id)")
var d1=!!document.getElementById
var n4=!!document.layers
function show(id){
hide()
changevis(id,true)
current=id
}
function hide(){
if(current!=null){
changevis(current,false)
current=null
}
}
function changevis(id,visible){
if(d1)
document.getElementById(id).style.visibility=(visible?"visible":"hidden")
else
if(n4)
document.layers[id].visibility=(visible?"show":"hide")
}
-->