a.nav:link { color: red; text-decoration: none }
a.nav:active { color: red; text-decoration: none }
a.nav:visited { color: red; text-decoration: none }
a.nav:hover { color: green; text-decoration: underline }

a.nav1:link { color: green; text-decoration: none }
a.nav1:active { color: yellow; text-decoration: none }
a.nav1:visited { color: green; text-decoration: none }
a.nav1:hover { color: brown; text-decoration: underline }