I have built a form using the Form API (Drupal 5). I'd like to add a way for users to select/create taxonomy terms in a free tag vocabulary, then associate them with one of the nodes that my form_submit function creates.

taxonomy_form() does produce a list box with the pre-existing vocabulary terms... but I'd like to have the text field (with javascript autocomplete) that is normally used for free tag taxonomies, and allow the creation of new terms on-the-fly.

Anyone know how to do this without eseentially re-creating the functionality in taxonomy.module?

Thanks!