how to implement three combo boxes

hi friends,
how to implement three combo boxes(Country,State,city)that filters each other when changed,Country filters State and city and state filters city.
plz help me
sailaja

re: how to implement three combo boxes

You will probably want to use Ajax. For instance, you could fill the country list from a database, and add an onchange to the box. The onchange would call a controller method to select states for that country and fill the state list. The state box would then work the same way to filter the city. Something like this maybe.