#top1 {
	background-image: url("../img/header_wielervereniging.png");
}
#top2 {
	background-image: url("../img/top2_wielervereniging.png");
}
#nav li:hover, #nav li.link_active
{
	background: url('../img/topmenu_over_wielervereniging.png');	
}