how to make a checkboxes(3) checked at one click using jquery

Question

Here i have bunch of checkboxes,

say, if i clicked on any checkbox, i want make checked next two checkboxes also (i.e, beside two)

<table border="1" cellspacing="0" width="450">
    <tr>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
    </tr>
    <tr>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
    </tr>
    <tr>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
    </tr>
    <tr>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
    </tr>
    <tr>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
        <td><input type="checkbox" /></td>
    </tr>
</table>

Fiddle

could anyone help me out,

Thanks in advance.

Answer 1

try with nextAll() and eq to select next two.

$('input:checkbox').change(function(){
  var obj=$(this).parent().nextAll(':eq(0),:eq(1)'); //eq(0) and (1) is the index of next two checkbox
  obj.find(':checkbox').prop('checked',this.checked)
});

fiddle here

this uncheck the checkbox if unchecked..

Answer 2

$(":checkbox").click(function () {
    $(this).parent().nextAll("td").slice(0, 2).find(":checkbox").prop('checked', true);
});

JSFIDDLE