many checkbox

<?php
$smena_plan = ($_POST['smena_plan'] == 'true') ? 'checked' : NULL ;
$smena_fact = ($_POST['smena_fact'] == 'true') ? 'checked' : NULL ;
?>

<label ><input type="checkbox" id="c_smena_plan" <?= $smena_plan ?>/> Смена(план)</label>
<label ><input type="checkbox" id="c_smena_fact" <?= $smena_fact ?>/> Смена(факт)</label>
<form name="upsert" id ="myForm" method="POST">		
<input id="smena_plan" name="smena_plan" type="hidden" value="<?= $smena_plan ?>">
<input id="smena_fact" name="smena_fact" type="hidden" value="<?= $smena_fact?>">
</form>
<script>
$(document).ready(function () {   
$("input:checkbox").change(function () {
$('#smena_plan').val($("#c_smena_plan").prop("checked"));
$('#smena_fact').val($("#c_smena_fact").prop("checked"));
$('#myForm').submit();
});
});
</script>