cfform autosuggest pass 2 values (locationname and locationid)

Hi chaps,

I've decided it's about time I started using cfform (3 mins in and I've already hit my first stumbling block!)

I want to have an autosuggest text input for users to choose a city. In my db I have locationnames and locationids.

eg

locationid   |   locationname

----------------------------------------

1                   London

2                   New York

3                   Paris

etc

The user will start to type the locationame - I want autosuggest to show locationanames that match, but when they submit the form I actually want the locationid to be passed..

How on earth do I do this with cfform?

Thanks very much for any help you can offer.

Nick