This right col is first in the source and is floated right. The left col (second in source) is floated left in the same wrapper.
This page is an XHTML test. It is served with an application/xhtml+xml mime type, to all except IE (IE6 switches to quirks mode, because of ?xml declaration).
This left col is left floated and also negatively margined to the left, so it is pulled out of its container.