/* Underline links only when the mouse is hovering over them */
:link {
     text-decoration:none;
 }

:visited {
     text-decoration:none;
 }

:link:hover {
     text-decoration:underline;
     background-color: #CCCCCC;
}

:visited:hover {
     text-decoration:underline;
     background-color: #CCCCCC;

}