Подключение калькулятора js

<script type="text/javascript" src="js/calc.js"></script>

function price_format(o) {
    return Number(o).toFixed(1);
}
 
    function recalc()
    {
    document.getElementById('fieldRes').innerHTML = price_format(parseFloat(document.getElementById('field1').value) * parseFloat(document.getElementById('field2').value));
    }
 
<tr>
<td style="padding-right:10px;">Продукт</td><BR>
<td>
<select name="b" id="field2" onchange="recalc()" style="width:150">
<option value="0" selected="selected">Выбрать...</option>
<option value="5">первый</option>
<option value="6">второй</option>
<option value="7">еще дин</option>
 
</select>
</td>
</tr>
 
    <tr>
<BR><BR><td style="padding-right:10px;">Количество:</td>
    <BR><input type=text id="field1" onKeyUp=recalc() value=0> кк<BR>
<BR>
    <td style="padding-right:10px;">Сумма к оплате:</td><BR>
    <td width=30%><span id="fieldRes">0</span></td>
<td style="padding-right:10px;">руб.</td>
    </tr>
    </table>

<script language="javascript" type="text/javascript">
    // You can place JavaScript like this
function price_format(o) {
    return Number(o).toFixed(1);
}
 
    function recalc()
    {
    document.getElementById('fieldRes').innerHTML = price_format(parseFloat(document.getElementById('field1').value) * parseFloat(document.getElementById('field2').value));
    }

<script type="text/javascript" src="js/calc.js"></script>
<tr>
<td style="padding-right:10px;">продукт:</td><BR>
<td>
<select name="b" id="field2" onchange="recalc()" style="width:150">
<option value="0" selected="selected">Выбрать...</option>
<option value="5">первый</option>
<option value="6">второй</option>
<option value="7">еще однии</option>
 
</select>
</td>
</tr>
 
    <tr>
<BR><BR><td style="padding-right:10px;">Количество:</td>
    <BR><input type=text id="field1" onKeyUp=recalc() value=0> кк<BR>
<BR>
    <td style="padding-right:10px;">Сумма к оплате:</td><BR>
    <td width=30%><span id="fieldRes">0</span></td>
<td style="padding-right:10px;">руб.</td>
    </tr>
    </table>

<script language="javascript" type="text/javascript">
    // You can place JavaScript like this
function price_format(o) {
    return Number(o).toFixed(1);
}
 
    function recalc()
    {
    document.getElementById('fieldRes').innerHTML = price_format(parseFloat(document.getElementById('field1').value) * parseFloat(document.getElementById('field2').value));
    }