<!--
/*
Global "swap" holder
Use value, null, if no layer initially visible
*/
var currlayerId = null;
function toglayer(id)
{
if(currlayerId) setDisplay(currlayerId, "none");
if(id)setDisplay(id, "block");
currlayerId = id;
}
function setDisplay(id,value)
{
var elm = document.getElementById(id);
elm.style.display = value;
}
// -->