Easiest “check all” ever with jQuery

jQuery Check All

/* HTML */

<fieldset>
	// these will be affected by check all
	<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>
</fieldset>
<fieldset>
	// these won't be affected by check all; different fieldset
	<div><input type="checkbox"> Checkbox</div>
	<div><input type="checkbox"> Checkbox</div>
	<div><input type="checkbox"> Checkbox</div>
</fieldset>

/* jQuery */

$(function () {
	$('.checkall').click(function () {
		$(this).parents('fieldset:eq(0)').find(':checkbox').attr('checked', this.checked);
	});
});