.bj1 {
	background-attachment: fixed;
	background-image: url(gsjj/tu2.jpg);
	background-repeat: repeat-x;
	background-position: left top;
}
.bj2 {
	background-attachment: fixed;
	background-image: url(gsjj/tu3.gif);
	background-repeat: repeat-y;
	background-position: left top;
}
.bj3 {
	background-attachment: fixed;
	background-image: url(gsjj/crcm.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}
.bj4 {
	background-attachment: fixed;
	background-image: url(gsjj/tu4.gif);
	background-repeat: repeat-x;
	background-position: left top;
}