How its work

I had explained Checkall checkbox using jQuery. In this we are going to explain how to do check all check boxs in same fieldset.Simple checks/unchecks all checkboxes with jQuery.

<fieldset>
<div><input type="checkbox" class="checkall"> Check all</div>
<div><input type="checkbox"> Checkbox</div>
<div><input type="checkbox"> Checkbox</div>
<div><input type="checkbox"> Checkbox</div>
<div><input type="checkbox"> Checkbox</div>
<div><input type="checkbox"> Checkbox</div>
<div><input type="checkbox"> Checkbox</div>
</fieldset>

$(function () {
$('.checkall').on('click', function () {
$(this).closest('fieldset').find(':checkbox').prop('checked', this.checked);
});
});

Demo: