Insert id="SomeName" to tr tag of table using JavaScript

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Hello Friends,

I am very new for JavaScript(So, this may be a very dumb question for experts)and facing a scenario where I need to insert id="table_tbody_tr1" to the very first tr tag of the table using a Javascript function.

In short, I have following code:

HTML

<div id="div_ScriptHolder">
    <table id="tbl_ScriptHolder" style="width: 100%;">
        <tbody>
            <tr>
                <td id="table_tbody_tr1_td1">
                    ROW 1 COL 1
                </td>
                <td id="table_tbody_tr1_td2">
                    ROW 1 COL 2
                </td>
                <td id="table_tbody_tr1_td3">
                    ROW 1 COL 3
                </td>
            </tr>
            <tr>
                <td id="table_tbody_tr2_td1">
                    ROW 2 COL 1
                </td>
                <td id="table_tbody_tr2_td2">
                    ROW 2 COL 2
                </td>
                <td id="table_tbody_tr2_td3">
                    ROW 2 COL 3
                </td>
            </tr>
            <tr>
                <td id="table_tbody_tr3_td1">
                    ROW 3 COL 1
                </td>
                <td id="table_tbody_tr3_td2">
                    ROW 3 COL 2
                </td>
                <td id="table_tbody_tr3_td3">
                    ROW 3 COL 3
                </td>

            </tr>
        </tbody>
    </table>
</div>

and I want this code to look like following (only change in the 4rth line from top). I need to achieve this using JavaScript function say for ex

JavaScript

function insertId(strTableId, strTrId) {
   // Which code I should place here..?
}

HTML

<div id="div_ScriptHolder">
    <table id="tbl_ScriptHolder" style="width: 100%;">
        <tbody>
            <tr id="table_tbody_tr1">
                <td id="table_tbody_tr1_td1">
                    ROW 1 COL 1
                </td>
                <td id="table_tbody_tr1_td2">
                    ROW 1 COL 2
                </td>
                <td id="table_tbody_tr1_td3">
                    ROW 1 COL 3
                </td>
            </tr>
            <tr>
                <td id="table_tbody_tr2_td1">
                    ROW 2 COL 1
                </td>
                <td id="table_tbody_tr2_td2">
                    ROW 2 COL 2
                </td>
                <td id="table_tbody_tr2_td3">
                    ROW 2 COL 3
                </td>
            </tr>
            <tr>
                <td id="table_tbody_tr3_td1">
                    ROW 3 COL 1
                </td>
                <td id="table_tbody_tr3_td2">
                    ROW 3 COL 2
                </td>
                <td id="table_tbody_tr3_td3">
                    ROW 3 COL 3
                </td>

            </tr>
        </tbody>
    </table>
</div>

Please help me. Your answers are very much appreciated in advance.

Thanks.

gnachiket

Posted 18-Jun-12 0:54am

Nachiket G

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Vitaly Obukhov · Answer 1 · 2012-06-18T01:32:00

Solution 1

JavaScript

function insertId(strTableId, strTrId) {
    document.getElementById(strTableId).
    getElementsByTagName('tr')[0].
    setAttribute('id', strTrId);
};

Posted 18-Jun-12 1:32am

Vitaly Obukhov