DIV.body{
	background-image: url(/_image/background.jpg);
	background-repeat: repeat-y;
	margin:0px 0px 0px 0px;
	padding:0px 17px;

	/* 画面中央に表示*/
	width:794px; 
	position:absolute;
	left:50%; 
	margin-left:-397px;
}