this one i know
you can hyperlink a graphic in html by using the following code:
<a href="http://www.yourdomain.com" target="blank"><img src="http://www.yourdomain.com/(imagelocation)"></a>
if it's a banner your hyper linking then you'll need an image host, like imageshack.us. They generate a lot of different codes for you. I use the one for the direct link, which is the last one at the bottom of all the codes they give.
If it's text your hyperlinking, you can do it like this:
<a href="http://www.whereveryouwantthistoredirectto.com" target = "_top">The text you want to appear gets typed here.</a>