Notice the large white area on the right. This page was built back in the "old days" for a screen with of 640 pixels, but is viewed on a screen set at 800 pixels wide.
Imagine what it would look like on a screen set at 1024 pixels wide!
This page is viewed on a "narrow" monitor
This is the same page viewed on the same monitor, but with a different resolution setting, it looks wider!
For More Information on Cascading Style Sheets be sure to check out the Interactive Media Center tutorial
Additional information about Cascading Style Sheets can be found at: