.navigation_bar {  font-family: "Arial", "Helvetica", "sans-serif"; font-size: 10px; font-weight: normal; color: #FFFFFF; text-decoration: none}
.navigation_bar:hover {  font-family: "Arial", "Helvetica", "sans-serif"; font-size: 10px; color: #FFFFFF; text-decoration: underline; background-color: #333333}