Class asp and ajax work

I'm in need a few general ajax functions using class asp. Below are the details for each of them. 1. I have two drop list values currently that are dynamically driven from a database table. What I would like to have completed is to load the first droplist and bassed on what's selected in the first droplist the second droplist will be updated based on the value from the first droplist. I need this to be an ajax call because I don't want the whole page to reload. 2. The next item is to update the value of a record when a image is clicked. I'd also like for the image to change as well when the value is updated. I have a list of records in a table format and i'd like to click on the image to update the status of the record with out haveing the whole page reloading. For example, I will have an image and when clicked it will update the status of a record in the db and the image for that record in the list will be updated as well. If the user clicks on it again the status will be changed back.