a:link, a:visited {
 text-decoration: none;
}
a:active, a:hover {
 text-decoration: none;
}

tr {
 text-align: center;
}

div#navt, div#navb {
 margin-top: 1em;
 margin-bottom: 1em;
}
div#navt a, div#navb a {
 text-decoration: none;
}