.back1 {  background-attachment: fixed; background-image: url(back1.jpg); background-repeat: repeat-y; background-position: center top}
.back2 {  background-attachment: scroll; background-image: url(back.jpg); background-repeat: no-repeat; background-position: center bottom}
.12n18px {  font-size: 12px; line-height: 18px}
.12b {  font-size: 12px; font-weight: bold}