javascript: drag & drop with forms

Hi there,

I want to use a drag and drop feature with some select boxes in a form.  I'd like Box A to be a select/list box with all the items available to a user.  The user can then drag and drop these items into Box B (a text box or select box, could probably process the data with either).

So for example, if Box A was a list of cities, like:

Toronto
Montreal
New York
Chicago
Miami
Boston
....

then Box B would be the cities the user wants to visit on their vacation, so the user can drag New York, Boston, and Chicago into Box B.

Thanks