Protex adlı üyeden alıntı: mesajı görüntüle
Buyur:

<html>
<body>
    <h1>Hesapla</h1>
    <form name="frm-pin" method="post" action="a.php">
        <input type="hidden" name="mode" value="PinRequest" />
        <label class="w3-text-green"><b>maliyet</b></label>
        <input name="maliyet" onchange="calculateAmount(this.value)" required value="" />
                <br>
                        <label><b>perakende</b></label>
                <input  name="tot_amount1" id="tot_amount1" type="text" readonly><br>
        <label><b>web</b></label>
        <input name="tot_amount2" id="tot_amount2" type="text" readonly>
 
        <script>
            function calculateAmount(val) {
                var tot_price2 = val * 2;
                                var tot_prica1 = val * 3;
                var divobj = document.getElementById('tot_amount1');
                                var divobj2 = document.getElementById('tot_amount2');
                divobj.value = tot_price2;
                                divobj2.value = tot_prica1;
            }
          
        </script>
        <body>
</html>
Sen adamın ham maddesisin )