[HTML] pobierz, plaintext 
    a) <input type="radio" name="shipping" id="s2" value="2" onfocus="change_cash('1 000', '1 023');" /><br />
    b) <input type="radio" name="shipping" id="s3" value="3" onfocus="change_cash('2 000', '2 046');" /><br />
    <strong id="netto">0 PLN</strong></span><br />(<span id="brutto">0 PLN</span>
 
    <script>
    function change_cash(netto, brutto){
    document.getElementById("netto").innerHTML = netto + " PLN";
    document.getElementById("brutto").innerHTML = brutto + " PLN";
    }
    </script>
[HTML] pobierz, plaintext