function _priceCalc(price) {
	return price.replace(',', '.');
}

function _priceView(price) {
	return price.toFixed(2).replace('.', ',');
}

function calculate(field, price, val, token) {
	var f = document.getElementById(field);
	// dummy entry
	f = null;
	if (f) {
		data = '';
		if (val > 0)
			data = val + ' Stk.<br/>' + _priceView(val * _priceCalc(price)) + ' ' + token;

		f.innerHTML = data;
	}
}