Open in your browser:
http://edom.github.io/haskell-intro/haskell-intro.html
You can replace haskell-intro.html with other file paths in this repository.
I assume you are using Ubuntu 12.04.
Run this (assuming that TCP port 8000 on your localhost is unused):
python -m SimpleHTTPServer 8000
Then, open http://localhost:8000/haskell-intro.html.