Scott, that was it! I have to admit I was a little dubious. I'm setting the value in jquery with $(myselector).val(newvalue), and thought, "There's no jquery .default_value" ... so that the note was referring, of course, to the form setting. What I don't understand is (a) why the value was in form-myfield-#post-myfield when I used #value (so -something- knew about it) and (b) how setting the value differently on its way to the client can make a difference when it's being reset on the client side with .val() The only thing I can think of is that when #value is used it's being marked as read-only in some way, and even though #post contains the new value, it's being reset to the original at some point. Thanks again, Jeff On 04/24/2011 07:28 PM, Scott Reynen wrote:
Are you perhaps setting your value on the hidden field with #value rather than #default_value? There's a note about that here:
http://api.drupal.org/api/drupal/developer--topics--forms_api_reference.html...
"Note that if you plan to use JavaScript to change your hidden element's value, you will need to use the #default_value property rather than #value."