function refreshimage()
{
	document.getElementById('im').src='img.php?txt=' + document.getElementById('txttext').value + '&font=' + document.getElementById('txtFont').value + '&col=' + document.getElementById('color').value;
	document.getElementById('price').innerHTML = CalculatePrice() + ' Euro';
	document.getElementById('pricetag').value = CalculatePrice() + ' Euro';
}
	
function CalculatePrice()
{
	var width = document.getElementById('size').value;
	var aantal = document.getElementById('aantal').value;

	if (width < 10) {
		width = 10;
		document.getElementById('size').value = 10;
	}

	if (aantal < 1) {
                aantal = 1;
                document.getElementById('aantal').value = 1;
        }

	height = width/5;


	var price = ((5+(0.0065*width*height))*(1+(aantal-1)*0.3));


	return price.toFixed(2);
}