Center Layout

I want a layout (3W pattern) witdh:500px height:400px centered in the browser window. I cannot find a way to center a layout like this. I do not want fullscreen. Is this possible?

Layout can be initialized in a certain div:


So, all you need is to center a div (you can try to use margin: 0 auto for this).

Yeah, thanks, I was including a style sheet by accident that was messing things up.