InfoPath Dev

I'm trying to create a Table of Contents on my InfoPath 2007 form. When the form is opened, the form is already populated with a list of users. Ideally, the user will be able to click on a letter at the top of the form, and the form will scroll down to that letter, but staying on the same form. Here's a rough draft of what my form looks like:

A  B  C  D  E  F  G  H  I  J  K  L

A

Abate, Jim

Able, Ken

B

Bable, Mike

Bubble, Joe

C

Citron, Paul

Curry, Jack

Is it possible to do what I want using the hyperlink function? Or do I need to write managed code? Or perhaps something else?

Use buttons in tables with conditional formatting for the rows (to hide them).