.sfondo_linea_down {  background-image:  url(sfondi/linea_vert_down.gif); background-repeat: no-repeat}
.sfondo_linea_up {  background-image: url(sfondi/linea_vert_up.gif); background-repeat: repeat-y}
.sfondo_colonna {  background-repeat: repeat-y; background-image:  url(images/linea_vert.gif)}