How to validate dose not entry duplicate value in second column textbox group by first column textbox.

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how to validate dose not entry duplicate value in second column textbox group by first column textbox.
It Should be result like below.

<pre lang="HTML">
    <table rules="all" class="table table-bordered">
        <tbody>
            <tr>
                <td>
                    <span>1</span><input name="SerialNo1" type="text" value="5">
                </td>
                <td><input name="SerialNo_1" type="text" value="1"></td>
            </tr>
            <tr>
                <td>
                    <span>2</span><input name="SerialNo2" type="text" value="5">
                </td>
                <td><input name="SerialNo_2" type="text" value="2"></td>
            </tr>
            <tr>
                <td>
                    <span>3</span><input name="SerialNo3" type="text" value="5">
                </td>
                <td><input name="SerialNo_3" type="text" value="3"></td>
            </tr>
            <tr>
                <td>
                    <span>4</span><input name="SerialNo4" type="text" value="9">
                </td>
                <td><input name="SerialNo_4" type="text" value="1"></td>
            </tr>
            <tr>
                <td>
                    <span>5</span><input name="SerialNo5" type="text" value="9">
                </td>
                <td><input name="SerialNo_5" type="text" value="2"></td>
            </tr>
            <tr>
                <td>
                    <span>6</span><input name="SerialNo6" type="text" value="10">
                </td>
                <td><input name="SerialNo_6" type="text" value="1"></td>
            </tr>
        </tbody>
    </table>

Please guide me

What I have tried:

I don't have any idea. How to get result.

Posted 9-Nov-17 15:09pm

SHANKAR KUAMR

Updated 9-Nov-17 15:42pm

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Karthik_Mahalingam · Answer 1 · 2017-11-09T15:42:00

try

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head>
<body>
    <table>
        <tbody>
            <tr>
                <td>
                    <span>1</span><input name="SerialNo1" type="text" value="5">
                </td>
                <td><input name="SerialNo_1" type="text" value="1"></td>
            </tr>
        </tbody>
    </table>
    <script>
        var left = document.getElementsByName('SerialNo1')[0];
        var right = document.getElementsByName('SerialNo_1')[0];
        left.addEventListener('blur', checkEqual);
        right.addEventListener('blur', checkEqual);
        function checkEqual(e) {
            if (left.value == right.value) {
                alert('both value should not be same,Please enter different value!');
                e.target.value = '';
                e.target.focus();
                return
            }
        }
    </script>
</body>
</html>

Demo: Plunker[^]