User-agent: Googlebot
Disallow: /?

User-agent: Slurp
Disallow: /?key=
Disallow: /?aff=

User-agent: msnbot
Disallow: /?key=
Disallow: /?aff=

User-agent: *
Disallow: /css/
Disallow: /images/ 
Disallow: /js/