function switchLayer(layerName) {

if(oldLayer==""){
	n=document.getElementById(layerName);
	n.style.visibility = "visible";
	oldLayer=layerName;
	}
    else
    {
	n=document.getElementById(layerName);
	n.style.visibility = "visible";

	o=document.getElementById(oldLayer);
	o.style.visibility = "hidden";
	oldLayer=layerName;
	}
}

function Sniffer(compatCode) {

if (navigator.appName == "Netscape" && (parseInt(navigator.appVersion)) < 5)
	{
		location.href=compatCode       
	}
}

function Sniffer1(compatCode) {
var browFlag=""
if (navigator.appName == "Netscape" && (parseInt(navigator.appVersion)) < 5)
	{
	browFlag="old"
   	}
if (browFlag!="old")
	{
		location.href=compatCode       
	}
}