var loaded = 0;

function layeron(){
loaded = 1;
}

function LOFF(layName){
if(loaded == 1){
if(document.layers) document.layers[layName].visibility='hide';
if(document.all) document.all(layName).style.visibility="hidden";
if(!document.all && document.getElementById) document.getElementById(layName).style.visibility="hidden";
}
}

function LON(layName){
if(loaded == 1){
if(document.layers) document.layers[layName].visibility='show';
if(document.all) document.all(layName).style.visibility="visible";
if(!document.all && document.getElementById) document.getElementById(layName).style.visibility="visible";
}
}