.achtergrondlinks {
	background-attachment: fixed;
	background-image: url(../images/a_achter_links.gif);
	background-repeat: no-repeat;
	background-position: right top;
}
.achtergrondrechts {
	background-attachment: fixed;
	background-image: url(../images/a_achter_rechts.gif);
	background-repeat: no-repeat;
	background-position: left top;
}
.achtermenu {
	background-attachment: fixed;
	background-image: url(../images/a_achter_menu.gif);
	background-repeat: no-repeat;
	background-position: left top;
}
.achtergrondinhoud {
	background-attachment: fixed;
	background-image: url(../images/a_achter_inhoud.gif);
	background-repeat: no-repeat;
	background-position: left top;
}