Here is a great little script for rotating banners throughout your website. The code in the text box below
can be copied and pasted into a simple text editor and saved, as is, as banner.js. Within this code you will notice that it
is set up with three banners, each linked to a different url. You can have as many ads in this simple rotator as you wish,
just add them following the same format as the ones shown. Also, ensure you change the var ad_count number from 3 to however
many ads you have in the rotation.