a.a1:link { color: #660000; text-decoration: underline; }
a.a1:visited { color: #660000; text-decoration: underline; }
a.a1:hover { color: #660000; text-decoration: none; }
a.a1:active { color: #660000; text-decoration: underline; }

a.a2:link { color: #330000; text-decoration: underline; }
a.a2:visited { color: #330000; text-decoration: underline; }
a.a2:hover { color: #330000; text-decoration: none; }
a.a2:active { color: #330000; text-decoration: underline; }

a.a3:link { color: #006666; text-decoration: underline; }
a.a3:visited { color: #006666; text-decoration: underline; }
a.a3:hover { color: #006666; text-decoration: none; }
a.a3:active { color: #006666; text-decoration: underline; }

a.a4:link { color: #990000; text-decoration: underline; }
a.a4:visited { color: #990000; text-decoration: underline; }
a.a4:hover { color: #990000; text-decoration: none; }
a.a4:active { color: #990000; text-decoration: underline; }