Class, I’ve put an example of a stretchable background image on the server, in a folder called ‘background-stretch.’ Additionally, you may find this link useful in how to code a stretching background, and what the different options do:
http://alistapart.com/article/supersize-that-background-please
The server also has an example of using Smooth Scroll. Here’s the URL I referenced when setting up that example, which walks you through the process from Step 1:
http://www.dwuser.com/education/content/quick-guide-adding-smooth-scrolling-to-your-webpages/