So 19130697

by Tushar Gupta

HTML

<table>
    <tr>
        <td>
            <input type="text" name="data1" value="abc" />
        </td>
        <td>
            <button type="button" onClick="addRow(this)">Add</button>
        </td>
    </tr>
</table>

JavaScript

var txtbox = '<td><input type="text"/></td>';

function addRow(btn) {
    $(btn).closest('tr').append(txtbox);
}