Populating Textareas depending on listbox selection

Hi,
I am currently developing my company's Intranet, adding new pages and modifying existing, using ASP VBScript and client side Javascript. I have hit a problem as follows:-

I populate a listbox during page load, using a SQL Server stored procedure. This is no problem, but when a user selects from this listbox I need to populate some textareas with data held in the database, related to the users selection. I am trying to do this without any user intervention, i.e. they change the listbox and the textareas are populated with the relevant data. Can anyone help with how I can retrieve the related data after the user has made their selection and then how I can populate the textareas at this point. I have tried using the onChange handler within the text area definition, this works fine and calls the specified Javascript, from which I can write hardcoded data into the textareas, but I can't figure how to retrieve the data at this point then write this retrieved data to the textarea. Any help would be appreciated. Thanks.

ASP Design Tips - Dependent Listboxes
http://www.bullschmidt.com/devtip-d...ntlistboxes.asp