Scrollbar jumping on and off...

I am working on a site in Joomla. Most of the pages are just about at the perfect height to almost require a vertical scrollbar. So when clicking between them you get this page jump or flash because the scrollbar is called up then turned off.

Any way to fix this?

http://www.designbyryanboog.com/laukkonen/highmark-builders

Force every page to have a scrollbar. There's a number of possibilities. Here's one. (http://ryanfait.com/resources/forcing-vertical-scrollbars/)

Thank you!