sIFR or Scalable Inman Flash Replacement is a web design technique used on the Enovate Design website to provide the green headings at the top of each page. It’s an extremely useful technique in any web designer’s arsenal.
Contrary to popular belief some interesting research on page source order has concluded that screen reader and text browser users prefer to see a sites main navigation before the main content of the page:
There appears to be little evidence to support the view that screen reader users would prefer to have the content presented first, or find sites easier to use when this occurs.