Hi all. I am working on modifying a node form to allow a user to progressively select down through a taxonomy tree, and when they have a final term selected, update the advanced view arguments for a view-backed nodereference field. I am using AHAH, so that as the user selects a term, the next set of potential sub terms will show, in a somewhat similar fashion to how Taxonomy Select works. However, the new select form elements I pull in via AHAH also have ['#ahah'] attributes themselves. As far as I can tell, the AHAH code doesn't seem to trigger for elements that were themselves brought into the form via AHAH. According to http://drupal.org/node/337941, you can get an array from drupal_add_js(NULL, NULL, 'header'); which you can in turn pass on to drupal_json() in order to attach the AHAH behaviours to elements pulled in via AHAH. However, I have tried this with no results. I would appreciate it very much if someone could take a look, and hopefully tell me where I've gone wrong, or what I have to do to get AHAH to work on the elements I am pulling in. You can view a copy of the module as it current stands at http://drupalbin.com/16170. Thanks, Brian