.back1 {
	background-attachment: scroll;
	background-image: url(../images/back1.gif);
	background-repeat: repeat-x;
	background-position: left top;
}
.back2 {
	background-attachment: scroll;
	background-image: url(../images/back2.gif);
	background-repeat: no-repeat;
	background-position: center top;
}
.back3 {
	background-attachment: scroll;
	background-image: url(../images/mainback.gif);
	background-repeat: no-repeat;
	background-position: center top;
}