.back {
	background-image: url(../images/back/back-top2.gif);
	background-repeat: repeat-y;
	margin-right: auto;
	margin-left: auto;
}
.back2 {  background-image: url(../images/back/top06.gif); background-repeat: no-repeat}
.back-kamoku {  background-image: url(../images/back/back_kamoku.gif); background-repeat: no-repeat}
.back-sen {  background-image: url(../images/back/back-sen1.gif); background-repeat: repeat-y}
.back_under {  background-image: url(../images/back/back_under.gif); background-repeat: no-repeat}
.back-kamoku2 { background-image: url(../images/waku/back-kadomaru3.gif); background-repeat: no-repeat }
.back-bluesen {  background-image: url(../images/sozai/sen-blue.gif); background-repeat: repeat-x}
.back-pinkwaku {  background-image: url(../content/img-dental_esthetic/2-h-back2.gif); background-repeat: repeat-y}
.back-green {  background-image: url(../content/img-periodontitis/2-back-green.gif); background-repeat: repeat-x}
.back-gray {  background-image: url(../images/waku/back-gray2.gif); background-repeat: repeat-y}
body {
	background-color: #D9D9D9;
	margin-top: 0px;
}