/*
Global "swap" holder
Use value, null, if no layer initially visible
*/
var currLayerIdFoot = "foot0";

function togLayerFoot(id)
{
if(currLayerIdFoot) setDisplay(currLayerIdFoot, "none");
if(id)setDisplay(id, "block");
currLayerIdFoot = id;
}

function setDisplay(id,value)
{
var elmFoot = document.getElementById(id);
elmFoot.style.display = value;
}