function PoliczRate(koszyk) { 
  window.open('https://www.zagiel.com.pl/kalkulator/index_smart.php?action=getklientdet_si_rata&shopNo=11721625&goodsValue='+koszyk, 'Policz_rate', 'width=630,height=500,directories=no,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no');
}

function ukryj () {
    var newsletterLayer = document.getElementById("newsletterLayer");
    newsletterLayer.style.display = 'none';
}