memberlist by usergroup with dropdownbox

[Ike013]

I'm looking for a hack that changes the memberlist so that you have a dropdownbox with all (not hidden) usergroups and when you select one that it only shows the members that are part of that group.

Anyone seen it somewhere or knows how to create it?

I know for instance ipb uses this as a default in their memberlist

[Marco van Herwaarden]

What is a hidden usergroup?

[Ike013]

a usergroup that wouldn't be listed on any result of memberlist.php like the banned usergroup & it's members

[Ike013]

bumping, hoping someone has the time or the hack