User-agent: Googlebot
Disallow: /*.gif$
Disallow: /*.jpg$
Disallow: /*.png$

User-agent: Googlebot-Mobile
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: Mediapartners-Google
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: Adsbot-Google
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: Googlebot-Image 
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: ia_archiver
Disallow: 

User-agent: ia_archiver/1.6
Disallow: 

User-agent: msnbot-media
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: msnbot
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$

User-agent: slurp
Disallow: /.gif$
Disallow: /.jpg$

User-agent: EmailCollector
Disallow: /

User-agent: *
Disallow: /.gif$
Disallow: /.jpg$
Disallow: /.png$