javascript - 如何验证只读文本框以在 javascript 中接受小数点后两位数？

Question

<分区>

Answer 1

$('.my_val').keyup(function () {

    var total = 0,
        count_field = 0,
        average;

    $('.my_val').each(function () {
        var val = parseFloat($(this).val(), 10);
        if (!isNaN(val)) {
            count_field += 1;
            total += val;
        }
    });

    average = (total / count_field).toFixed(2);
    $('.output').val(average);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Input1 : <input class="my_val" type="number" size="5" name="input1"><br/>
Input2 : <input class="my_val" type="number" size="5" name="input2"><br/>
Input3 : <input class="my_val" type="number" size="5" name="input3"><br/>
Input4 : <input class="my_val" type="number" size="5" name="input4"><br/>
Input5 : <input class="my_val" type="number" size="5" name="input5"><br/><br/>
Result : <input class="output" type="number" size="5" name="input6" readonly>