Div tags can have a relative position to other content, or an absolute position allowing
them to float over other elements. Both types of positioning are useful and we’ll cover
both in this class. In this exercise you’ll create a <div> that is “layered” over other content. The rest of
the page will layed out with relative postition divs and styled with CSS borders, padding, and background images. The hide/show effect
will be added in a later exercise.
