To follow on from Auto-populating Select Boxes using jQuery & AJAX, I've had more than a few requests for how to do this for multiple select boxes. In response, I've written a jQuery plugin and have included a simple example of three select boxes populating each other driven by a MySQL database.

Update: due to popular demand, I've caved in, and written a plugin and demos with multiple-select boxes populating each other and driven from MySQL. View: Auto-populate multiple select boxes If you are familiar with using select boxes for categorisation and sub-categories, such as ebay does when selling an item, [...]