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

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

User-agent: ia_archiver
Disallow: /