Here is a solid and secure, cross browser compatible three column layout. It can also be transformed into a two column layout on the fly by simply editing the body class and removing the unneeded column - big plus for content management systems!
- Supports absolute or percentage widths, sorry, no ems
- Search engine optimized with content (middle column) towards the top instead of the side columns
- Can float and clear floats in any column without breaking the layout
- Works in FF, Safari, IE 6, IE 7 and Opera