Ajax update input fields using data from database

Does anyone have any information or links to tutorials on how to have a select list update other fields in a form using ajax?

Example. I have list of customers stored in a database. I would like to have a drop down containing a list of customers on a form, that when selected, would update several input fields on a form with the customer details from the database.

Any ideas?

Thanks!

Use the Rails observe_field function (http://api.rubyonrails.org/ classes/ActionView/Helpers/PrototypeHelper.html#M000966):-

Here is an example of it in use (http://www.railshosting.org/ #live_searching), obviously they are using it for a different purpose but the underlying logic is the same:-

1. Observe field changing 2. Make AJAX request 3. Update page element

Regards, Jabbslad