Check it out: http://alistapart.com/articles/multicolumnlayouts
This site uses a combination of the techniques presented in the article. I have a red border on the container and a gray border on the body. By overlapping them, I get the effect of having a border around the rail.
So many times when people talk about web site accessibility and SEO, one of the main things mentioned is to make sure all of your images have an ‘alt tag’ to provide descriptive text for screen readers and search engines. Even Google says this in their Webmaster Help Center, in the Webmaster Guidelines and the How can I create a Google-friendly site sections. Of course what they mean is alt attribute. What I hope this site can do is clarify some of the confusion with web development, and maybe present some new ideas and techniques. Thoughts and ideas are welcomed.