อยากถามเรื่องการบันทึกข้อมูลที่มี js เข้ามาเกี่ยวข้อง

<td><input type='text' name='Leave_total' id='Leave_total' size=' 5'  value='<?php echo$Leave1; ?>' style="width:70px;"  ></td>
<td><input type='text' name='Leave_Sum2' id='Leave_Sum2' size='5' value=""	style="width:70px;"></td>
			<td><input type='text' name='Leave_total3' id='Leave_total3' size='5'  	style="width:70px;" class="textbox"  > </td>
				<label><b></b></label>&nbsp<input type='hidden' name='Leave_total4' id='Leave_total4' size='5' value='' style='width:70px;' >

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(e) {
$('#Leave_Enddate').on('change',function(){
var Start=new Date($('#Leave_Strdate').val());
var End=new Date($(this).val());
var Diff=End-Start;
var Days=(Diff/1000/60/60/24)+1;
$('#Leave_Sum2').val(Days);
$('#Leave_Sum').val(Days);
$('#Leave_total3').val(parseInt($('#Leave_total').val())+parseInt(Days));
$('#Leave_total4').val(parseInt($('#Leave_total').val())+parseInt(Days));
});
});
</script>