Hi. I am looking for a tutorial for that script that displays a list below a text box with suggested matches as you type stuff in. For example, if you go to search here on WHT, and type something in the User box. It displays members that partially match what you have typed in so far. I am not sure what this is called. Thanks.

It is called auto-complete or auto-suggest. It uses AJAX to fetch data from the database and display to the user as possible suggestions.

Follow this link: http://www.pengoworks.com/workshop/jquery/autocomplete.htm

Alternatively you can google for "AJAX auto complete"