.back_rb {
	background-attachment: scroll;
	background-image: url(img/back_rb.jpg);
	background-repeat: no-repeat;
	background-position: right bottom;
}
.back_lt {

	background-attachment: fixed;
	background-image: url(img/back_lt.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}
body {
	background-attachment: fixed;
	background-image: url(img/body.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}