With positioning, you can place images exactly where you want them, even behind
text and other images. On this page we have the background image which has the
squares that you see behind those words. However, the green image is between
the text and the background of the page. This is done using CSS and HTML. This
works best with MSIE. Netscape 4.x shows the green imgae in a different place
because it doesn't apply the CSS. If you're using Netscape 6+, you won't see
the green image.