[support] Font-resizer within content?

Hello, I'm working on a site for someone in Drupal 5.1, and they really want a font resizer on the page. I came across this page: http://www.champaign.org/help_and_how_to.html In the main content area, there's a gif that changes font size for just the content area. Any idea if this is possible in Drupal? Anybody found a good font resizer for Drupal? - jody