How do I create an AJAX filter for a view?
Edit the view, and add a filter to the page:


Drupal 6: Third column, section is called Filters
Drupal 7: First column, section is called Filter Criteria

When you configure the filter, you want to expose it:


Drupal 6: Click the Expose button in the top right of the configure area
Drupal 7: Check Expose this filter to visitors, to allow them to change it

Enable AJAX:


Drupal 6: Use AJAX is under Basic settings in the first column
Drupal 7: Use AJAX is under Advanced &rarr; Other in the third column



When the view is saved, there will now be a form that'll allow users to filter the view dynamically via AJAX.