function submenu(w) {
	subout();
	document.getElementById('sub-'+w).style.display="block";	
}

function subout() {
	document.getElementById('sub-waarom').style.display="none";	
	document.getElementById('sub-hoe').style.display="none";	
	document.getElementById('sub-wie').style.display="none";	
}

function subout2() {
	//subout();	
}