a.nav_link_unselected {
  /*  */
  text-decoration: none;
  color:white;
  padding: 4px;
  background-color: black;
  font: 7.5pt Arial, Helvetica, sans-serif;
  font-weight: bold;
}

a.nav_link_selected, a.nav_link_unselected:hover {
  text-decoration: none;
  color:white;
  padding: 4px;
  background-color: black;
  font: 7.5pt Arial, Helvetica, sans-serif;
  font-weight: bold;
  background-color: #AA0000;
}

ul.nav li {
  float: left;
}