This is the advertisement bar. We have at the moment three blocks where we can put some content, the main area, the top navigation bar and the advertisement block. Each one will be as high as its content demands, but we have constrained their widths so the blocks for the left and right navigation bars won't be invaded by the content in these div elements. Let's put in place the "Tip of the day" box using the float property so the content in the main area will flow around as needed. We put a div with id "tipDay" inside the "main" div, set the float property to right and declare its width to some value (be sure to declare the width for all the elements with float set to a value other than none).