Add a value to drop-down (select) in Ruby on Rails?
===

I'm looking for a nice solution to add a value to a drop-down (select) menu.

I was thinking of some kind of a '+' link which will show a text field on click and then you type in a value, save it ajax-style and somehow reload the opitions for the drop-down menu. That kinda seems like quite a bit of work.

Any suggestions or ideas?