var state = 'none';

function showdiv(who) {

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