User-agent: Googlebot
Disallow: /nav0_home.html
Disallow: /nav1_home.html
Disallow: /nav2_home.html
Disallow: /nav3_home.html
Disallow: /nav0_nav.html
Disallow: /nav1_nav.html
Disallow: /nav2_nav.html
Disallow: /nav3_nav.html
Disallow: /nav0.html
Disallow: /nav1.html
Disallow: /nav2.html
Disallow: /nav3.html

User-agent: *
Disallow: /nav*