This is the SWEET CSS Button Technique in action! Notice that there is no load time, and if you look at the code, it's very very simple HTML:
<a href="#" class="button"></a>
NOTE: This Entry is being used by this blog post: http://websitedesign.ashtonsanders.com/2007/04/css-button-one-sweet-css-button.html
Please link to the blog post, not this page.