//--------LAYERS-----------------------------------
var ie = (document.all)?1:0; // IE4
var ns4 = (document.layers)?1:0; // Netscape 4
var ie5 =(document.getElementById)?1:0; // DOM3 = IE5, NS6
function hide(layer) {

if (ns4){
document.layers[layer].visibility = "HIDE";
}

else if (ie5){
document.getElementById(layer).style.visibility = 'hidden'; 
}
 
else if (ie) {
document.all.layer.style.visibility = 'hidden';
}
}

function show(layer) {

if (ns4){
document.layers[layer].visibility = "SHOW";
}

else if (ie5){
document.getElementById(layer).style.visibility = 'visible'; 
}
  
else if (ie){
document.all.layer.style.visibility = 'visible';
}
}