.tupiankuang {
	background-position: 50%;
	border: 1px solid #000000;
}
.bkbj {
	background-image: url(images/middle.gif);
	background-repeat: repeat-y;
	background-position: right;
}
.bg {
	background-attachment: fixed;
	background-repeat: repeat-x;
	background-position: center top;
	background-image: url(image/header-2_09.gif);
}