function PoliczRate(koszyk) 
{
window.open('https://www.zagiel.com.pl/kalkulator/index_smart.php?action=getklientdet_si_rata&shopNo=16402696&goodsValue='+koszyk, 'Policz_rate',
'width=630,height=500,directories=no,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no');
}