function show_hidden(id) { 

var layer_ref = "hd_" + id;

state = check_state(id);

if (state == 'block') { 
state = 'none'; 
} 
else { 
state = 'block'; 
} 
if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "document.all." + layer_ref + ".style.display = state"); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
document.layers[layer_ref].display = state; 
} 
if (document.getElementById &&!document.all) { 
hza = document.getElementById(layer_ref); 
hza.style.display = state; 
} 
} 

function get_object(layer_ref) {

var obj;

if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "obj = document.all." + layer_ref); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
obj = document.layers[layer_ref]; 
} 
if (document.getElementById &&!document.all) { 
obj = document.getElementById(layer_ref); 
} 

return obj;
}

function check_state(id){
var layer_ref = "hd_" + id;
var st;

if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "st = document.all." + layer_ref + ".style.display"); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
st = document.layers[layer_ref].display; 
} 
if (document.getElementById &&!document.all) { 
hza = document.getElementById(layer_ref); 
st = hza.style.display; 
} 

return st;


}