[otrs] Adding filters in the AgentTicketQueue

Hello dear List, Today, the AgentTicketQueue allows to sort tickets by various columns (Age, Ticket Number, State, ...) - I've added some more columns for our own needs (Customer Language for instance). I wonder if it's possible to add the option to "Filter" the tickets depending the value in those columns, to show for instance only the "Open" tickets or only the tickets in German (or a combination of the two). I'm envisioning filters à la Excel, with a simple drop-down using <SELECT> + some Javascript to trigger the filtering. Has anyone done this so far? Olivier