body {
  
   background: url("Achtergrond_onze_site.jpg");
                       
   
   html,body {
	margin: 0;
	width: 100%;
	height: 100%;

}
#background {
	width: 100%;
	height: 100%;
}
#all {
	position: absolute; 
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	overflow: auto;
}