#menu { height: 29px; }
#menu li a span.fondo_principal { display: block; width: 90px; height: 29px; background: transparent url(../images/pestania.gif) left top no-repeat;}
#menu li a span.fondo_dcha { display: block; width: 20px; height: 29px;  background: transparent url(../images/pestania_der.gif) right top no-repeat;}


#menu li a span.fondo_dcha { display: block; width: 90px; height: 20px;  padding: 7px 0; background: transparent url(../images/pestania_der.gif) right top no-repeat; overflow: hidden;}
#menu li.menu_dcha a span.fondo_dcha { display: block; width: 90px; height: 29px; padding: 9px 0 0 0; background: transparent url(../images/pestania2_der.gif) right top no-repeat; overflow: hidden;}

#linea_gris_menu { clear: both; }