I've been developing an AJAX module for a client that needs to run on both Drupal 5 and Drupal 4.7. Unfortunately, the jQuery 4.7 module uses the now well outdated 1.0.3 version of jQuery and I was finding a number of incompatibilities cropping up between the more recent Drupal 5 version and the older Drupal 4.7 version.
Here's a simple way to bring your Drupal 4.7 up to date with the current version of jQuery, and to allow for simple upgrades when new versions of the library are released.
This is part three of a series. If you haven't already, you might be interested in reading previous articles.
In this tutorial, we are going to implement the hook_form_alter() function to test for duplicate entries based on a form field.
I'll be using the nodetracker content type that we built in previous tutorials for demonstration purposes, but the general method is applicable to any form or content type within Drupal.
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We won't mind a bit.
