Lorem:
Ipsum:
Dolor:
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi lectus nibh, tincidunt a, interdum sit amet, consequat vel, lorem. Maecenas semper, est in blandit feugiat, elit dolor blandit urna, quis tristique erat nisl vel lectus. Quisque ultricies porttitor neque. Praesent risus. Ut vitae lectus sed quam tempor facilisis. Nam magna lectus, consectetuer a, bibendum in, sagittis in, quam. Sed elementum. Proin tellus metus, volutpat ut, interdum vitae, iaculis quis, massa.

Lorem  
Ipsum

Quisque suscipit, lectus at nonummy pharetra, odio orci scelerisque lorem, vel elementum dui felis vel felis. Vestibulum id justo. Sed convallis, libero a elementum pulvinar, velit purus consectetuer purus, in ullamcorper lectus tortor at odio. Ut venenatis congue risus. In nulla sem, tristique eu, viverra fringilla, accumsan in, wisi. Sed commodo. Aliquam scelerisque eros sit amet enim bibendum porttitor.



tested in:
Mozilla Firefox 0.8
Safari 1.0
MSIE 6
If the browser does not support the core DOM script used, it will gracefully fail by laying out each tab pane under each other, so it will still be useable.

Because the tabs are anchor elements, the user may use the keyboard to navigate the tabs, instead of the mouse. You could also add accesskey attributes to them.