a.navegacao:link{display:block; height:30px; padding-top:6px; background-color:#C0C0C0; font-family:Verdana; font-size:10pt; color:#303030; font-weight:bold; text-decoration: none}
a.navegacao:visited{display:block; height:30px; padding-top:6px; background-color:#C0C0C0; font-family:Verdana; font-size:10pt; color:#303030; font-weight:bold; text-decoration: none}
a.navegacao:hover{display:block; height:30px; padding-top:6px; background-color:#808080; font-family:Verdana; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}
a.navegacao:active{display:block; height:30px; padding-top:6px; background-color:#808080; font-family:Verdana; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}

a.navegacao_activa:link{display:block; width:98px; height:28px; padding-top:5px; font-family:Verdana; background-image: url('imagens/fundo_links_navegacao.jpg'); background-repeat: no-repeat; background-position: left top; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}
a.navegacao_activa:visited{display:block; width:98px; height:28px; padding-top:5px; font-family:Verdana; background-image: url('imagens/fundo_links_navegacao.jpg'); background-repeat: no-repeat; background-position: left top; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}
a.navegacao_activa:hover{display:block; width:98px; height:28px; padding-top:5px; font-family:Verdana; background-image: url('imagens/fundo_links_navegacao.jpg'); background-repeat: no-repeat; background-position: left top; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}
a.navegacao_activa:active{display:block; width:98px; height:28px; padding-top:5px; font-family:Verdana; background-image: url('imagens/fundo_links_navegacao.jpg'); background-repeat: no-repeat; background-position: left top; font-size:10pt; color:#FFFFFF; font-weight:bold; text-decoration: none}