AS3 - Dynamically moving map

I’m working on a project that requires a small map to follow the user down the page as they scroll through listings. Although I’ve seen this done with Javascript, I can’t seem to find an example of this done in a Flash app.

Here’s an example using Javascript:
http://www.yelp.com/search?find_loc=Downtown%2C+Los+Angeles%2C+CA&cflt=restaurants

If anyone has any suggestions on how to dynamically move an element based on the position of the browser’s scrollbars it would be much appreciated.