User-agent: *
Disallow: .jpg$
Disallow: .jpeg$
Disallow: .gif$
Disallow: .png$
Disallow: .bmp$
Disallow: .mp3$
Disallow: .mp4$
Disallow: .avi$
Disallow: .wmv$
Disallow: .wav$
Disallow: .flv$