Na wat kerfuffle op Unraveled over het al dan niet stelen van CSS staat plots dit in de source code van de desbetreffende pagina op Freshly Squeezed Software:

/*
  These CSS tabs were developed with the help of the sites listed below. You are free
  to steal them without giving any credit whatsoever. Enjoy!

  Other useful tab sites:
  http://kalsey.com/tools/csstabs/
  http://diveintomark.org/public/tabs-example.html
  http://clagnut.com/sandbox/csstabs/?writingtext=csstabs
  http://www.homelesspixel.de/tabs/tabs.html
  http://www.simplebits.com/bits/css_tabs.html
*/

Ooooooh! [handbag]