.head_bg {  background-attachment: fixed; background-image: url(images/head_mid.gif); background-repeat: repeat-x; background-position: center top}
.bottom_bg {  background-attachment: fixed; background-image: url(images/bottom_bg.gif); background-repeat: repeat; background-position: center top}
.pc_bg {  background-attachment: fixed; background-image: url(images/pc_bg.jpg); background-repeat: repeat-y; background-position: right top}
.right_bg {  background-attachment: fixed; background-image: url(images/head_right.gif); background-repeat: no-repeat; background-position: right top}
.bottom_mid {  background-attachment: scroll; background-image: url(images/bottom_bg_mid.gif); background-repeat: repeat-x; background-position: center top}
.pc_bg_left {  background-attachment: fixed; background-image: url(images/pc_bg2.jpg); background-repeat: repeat-y; background-position: left top}