User-agent: baiduspider
Disallow: /serv/
Disallow: /ad/
Disallow: /cache/

User-agent: Googlebot
Disallow: /serv/
Disallow: /ad/
Disallow: /cache/

User-agent: Slurp
Disallow: /serv/
Disallow: /ad/
Disallow: /cache/

User-agent: MSNBot
Disallow: /serv/
Disallow: /ad/
Disallow: /cache/