.link_a {  color: #666666; font-weight: bold; text-decoration: none}
.link_a:hover {  font-weight: bold; color: #cc0000; text-decoration: underline}
.link_b {  color: #cc0000; font-weight: bold; text-decoration: none}
.link_b:hover {  font-weight: bold; color: #cc0000; text-decoration: underline}