function calculateTotal() {

	var number = document.getElementById('aantalDvds').value;
	var total = number * 8;
	
	document.getElementById('aantalSom').innerHTML = number;
	document.getElementById('totaalSom').innerHTML = total;
	
}

function checkLid() {
	
	if (document.getElementById('lidzijn').checked){
	
	document.getElementById('overlayForm').style.display = "none";
	
	}
	
	else {
	
	document.getElementById('overlayForm').style.display = "block";
	
	}
	
}

function calculateTotal2() {

	var number = document.getElementById('aantalDvds').value;
	var total = number * 9;
	
	document.getElementById('aantalSom').innerHTML = number;
	document.getElementById('totaalSom').innerHTML = total;
	
}

function checkCode(value) {
	
if (document.getElementById('lidzijn').checked){
	
	document.getElementById('overlayForm').style.display = "none";
	
	}
	
	else {
	
	document.getElementById('overlayForm').style.display = "block";
	
	}
	
}