.back1 {  background-attachment: fixed; background-color: #000000; background-image: url(bk_r1_c1.jpg); background-repeat: no-repeat}
.back2 {  background-attachment: fixed; background-color: #FFFFFF; background-image: url(bk_r2_c1.jpg); background-repeat: no-repeat}
.back3 {  background-attachment: fixed; background-color: #FFFFFF; background-image: url(bk_r4_c3.jpg); background-repeat: no-repeat; background-position: right bottom}
.back4 {  background-color: #000000; background-attachment: fixed; background-image: url(bk_r5_c1.jpg); background-repeat: no-repeat; background-position: right top}
.mbk1 {  background-attachment: fixed; background-image: url(mbk1.jpg); background-repeat: repeat-y; background-color: #FFFFFF}