Seriously.... here is my pet hate.
onmouseover="window.status='http://www.sponsorcode.com';return true" onmouseout="self.status='';return true"
A real URL in the status bar has a forward slash after the ".com" like this.....
onmouseover="window.status='http://www.sponsorcode.com/';return true" onmouseout="self.status='';return true"
Also, if you place this into the head of a page.....
<META HTTP-EQUIV="imagetoolbar" CONTENT="no">
those pesky IE image toolbars will not show up when someone mouses over your images.
Especially useful when doing a tour, when you don't want distractions appearing on screen.