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

function hideSpot() { 
if (ng5) document.getElementById('spot1').style.visibility = "hidden" 
else if (ns4) document.spot1.visibility = "hide" 
else if (ie4) spot1.style.visibility ="hidden" 

if (ng5) document.getElementById('spot2').style.visibility = "hidden" 
else if (ns4) document.spot2.visibility = "hide" 
else if (ie4) spot2.style.visibility ="hidden" 

if (ng5) document.getElementById('spot3').style.visibility = "hidden" 
else if (ns4) document.spot3.visibility = "hide" 
else if (ie4) spot3.style.visibility ="hidden" 
}

function showSpot(n) { 
hideSpot(); 
if (ng5) document.getElementById('spot' + n).style.visibility = "visible"; 
else if (ns4) document.layers["spot" + n].visibility = "show"; 
else if (ie4) document.all["spot" + n].style.visibility = "visible"; 
}