.back_top {
	background-attachment: scroll;
	background-image: url(pics/back_top.jpg);
	background-repeat: no-repeat;
}
.back_mitte {
	background-attachment: scroll;
	background-image: url(pics/back_mitte.jpg);
	background-repeat: no-repeat;
}
.back_top_eng {

	background-attachment: scroll;
	background-image: url(pics/back_top_eng.jpg);
	background-repeat: no-repeat;
}