.sfondo_01 {  background-attachment: scroll; background-image: url(fondo_index_1.jpg); background-repeat: repeat-x; background-position: top}
.sfondo_02 {  background-attachment: scroll; background-image: url(fondo_testatina_1.jpg); background-repeat: repeat-x; background-position: top}
.fondo_ante {  background-attachment: scroll; background-image: url(fondo_antenuvola_01.gif); background-repeat: no-repeat; background-position: left top}