var visibleVar="null";
//var layerRef="document.all";
//var styleSwitch=".style";
//var visibleVar="visible";

function init(){
if (navigator.appName == "Netscape") {
layerRef="document.layers";
styleSwitch="";
visibleVar="show";
}else{
layerRef="document.all";
styleSwitch=".style";
visibleVar="visible";
}
}

function showLayer(layerName){
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
}
function hideLayer(layerName){
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
}