Think of this as you would of NTSC television signals -- people with old black-and-white televisions can still watch the shows, but they wouldn't see all the pretty colours, and probably wouldn't have access to SAP or closed captioning. Progressive enhancement means that people using IE6 (or Lynx, for that matter) can still use the site, but they might not see the latest features.
Using JS to do the dirty work for something that is really no more than pleasant eye candy is somewhat reminiscent of some of the schemes I remember for embedding screen-edge encoding to control mechanical colour wheels to enable colour viewing on B&W tvs -- now, that's pointless.
Using JS to do the dirty work for something that is really no more than pleasant eye candy is somewhat reminiscent of some of the schemes I remember for embedding screen-edge encoding to control mechanical colour wheels to enable colour viewing on B&W tvs -- now, that's pointless.