This is a div contained within the container div. It is only 70 pixels wide and is floated to the right. If you view this page in Firefox or Opera, you'll see how it should correctly be displayed. If you view it in IE, you'll see something very different.
This is the container div. It is 200 pixels wide and is centered on the page.
This is yet another div. It's also 200 pixels wide, is centered, and has a 20 pixel margin on top.