JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css">
<link rel="stylesheet" href="http://tarruda.github.com/bootstrap-datetimepicker/assets/css/bootstrap-datetimepicker.min.css">
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js"></script>
<script src="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.min.js"></script>
<script src="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.pt-BR.js"></script>
<table border="1" id="mytable"/>
    <tr>
        <th>Add</th>
        <th>Username</th>
        <th>EmailId</th>
        <th>Mobile No</th>
    </tr>
    <tr id="mytr0">
        <td class="cb">
            <input value="yes" name="mytr0" checked="" type="checkbox">
        </td>
        <td>Dave</td>
        <td>[email protected]</td>
        <td>5920 09825 09</td>
    </tr>
    <tr id="mytr1">
        <td class="cb">
            <input value="yes" name="mytr1" checked="" type="checkbox">
        </td>
        <td>Mary</td>
        <td>[email protected]</td>
        <td>5849 8903458</td>
    </tr>
    <tr id="mytr2">
        <td class="cb">
            <input value="yes" name="mytr2" checked="" type="checkbox">
        </td>
        <td>Jack</td>
        <td>[email protected]</td>
        <td>9034823048239</td>
    </tr>
    <tr id="mytr3">
        <td class="cb">
            <input value="yes" name="mytr3" checked="" type="checkbox">
        </td>
        <td>Stanley</td>
        <td>[email protected]</td>
        <td>2903490249032</td>
    </tr>

</table>

<input type="button" id="btn2" class="btn btn-lg btn-primary" value="Group">

JavaScript

var myData = [];
mytable.$('input[type="checkbox"]:checked').each(function(){
  myData.push($(this).parent().text());
});
alert(myData);