I know I've seen this somewhere before but for the life of me I can't find it. Take a look at this page:

http://www.katycommunity.com/kisd.php

Now - what I need to do is have the data on the right update depending on what selection they make from the dropdown list on the left. I don't want to have to reload the page with each change so I'm thinking this is a javascript thing.

Does anyone have any sample code?