Autocompletion key value

Hi Guys,

I guess someone has done this before…

I need to use autocompletion to look up a list of values (think car
brands)
However, in the model I save the id of the brand, not the description.
(its not an option to lookup the id using the description after submit)

Has anyone done something like this?

I guess something with a hidden field or something could do the trick…

thanks in advance

Mikkel