Hi all, I wanted to send an httpRequest for each change in taxonomy multiselect fields (when editing cck nodes). I tried to add a ['#ahah'] param to all my taxonomy form entries, it works, but the WHOLE form is sent each time a select change. I expected to send only the form entry concerned. Is this "normal" or is there another way to do this with ahah ? (D6, cck 6.x-2.0-rc6) At the end, I found a solution without ahah, writing an external js file instead of ahah params in drupal $form, but I'm curious about ahah use. My code : // in my hook form_alter foreach ($form['taxonomy'] as $vid => $taxonomy_entry) { if ($taxonomy_entry['#type'] == 'select') { $form['taxonomy'][$vid]['#ahah'] = array( 'path' => 'eduforge/taxonomy_change/' .$vid, 'event' => 'change', 'wrapper' => 'eduforge_taxonomy_change_output', 'method' => 'replace', 'effect' => 'fade', ); } } // in hook menu $items['eduforge/taxonomy_change/%'] = array ( 'page callback' => 'eduforge_taxonomy_change', 'page arguments' => array (2), 'type' => MENU_CALLBACK, /// ... ); function eduforge_taxonomy_change($vid) { // here, $_POST contains the whole form // some code drupal_json(array('status' => TRUE, 'data' => $returned_datas)); } Thanks for advices Daniel