JS validation to include callbacks using AJAX and posting all current form fields (http://docs.jquery.com/Ajax/serialize).

Comments

robloach’s picture

In a lot of cases, we wouldn't need to call the server for validation:
http://bassistance.de/jquery-plugins/jquery-plugin-validation/

attiks’s picture

I maintain http://drupal.org/project/clientside_validation which does exactly this, if I have time (or money) I all support for it