[development] groking ajax callbacks

[Earl Miles]

Augustin (Beginner) wrote:
>     url: Drupal.settings.book.formCallback +'/'+ $('#'+ 
> Drupal.settings.book.formId +' input[name=form_build_id]').val() 
> +'/'+ $('#edit-book-bid').val(),

The part that you're not seeing is that there are 'settings' that are 
set via inline javascript and there's a Drupal-side API to make this easy:

drupal_add_js($some_array, 'setting');

So if: $some_array = array('book' => array('formCallback' => 'book/js'));

That covers the first part of it.

The it pulls the formId out of the settings and uses jQuery to find the 
form_build_id input in that form and take it's value, and after that 
you've got the book id from #edit-book-bid.

Search book.module for drupal_add_js and look for the 'setting' call. I 
think it'll be more clear after that.