Yup. This is heavily inspired by DHTML behaviors, like most of the componenty stuff today on the Web.
IE team did some great trailblazing work back in the day! :)
IE team did some great trailblazing work back in the day! :)
Keep in mind that at the time it was all based on the Trident rendering engine introduced in IE4. The system requirements at the time were Win95 and 16MB of RAM. You write different code for that vs. a modern desktop today.