var visibleVar="null"; 
function init(){

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

eval(layerRef+'["animate"]'+styleSwitch+'.visibility="visible"');
eval(layerRef+'["slog"]'+styleSwitch+'.visibility="visible"');
} 


function showLayer(layerName){
eval(layerRef+'["Menu1"]'+styleSwitch+'.visibility="hidden"');
eval(layerRef+'["Menu2"]'+styleSwitch+'.visibility="hidden"');
eval(layerRef+'["Menu3"]'+styleSwitch+'.visibility="hidden"');
eval(layerRef+'["Menu4"]'+styleSwitch+'.visibility="hidden"');
eval(layerRef+'["Menu5"]'+styleSwitch+'.visibility="hidden"');

eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
} 

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