รบกวนขอสอบถามการทำเพิ่มแถวเพื่อ insert multiple record ครับ

<script type="text/javascript" src="js/jquery.js"></script> //Jquery
<script>
$(function(){
	$("#add").on('click' , function(){
		var textbox = '<div><input type="text" name="textbox[]" /></div>';
		$("#textbox").append(textbox);
	})
	
});
</script>
<button type="button" id="add">Add</button>
<div id="textbox">

</div>

<script type="text/javascript" src="js/jquery.js"></script>
<script>
$(function(){
	$("#add").on('change' , function(){
		var value = $(this).val();
		var textbox = '';
		var i;
		for (i = 0; i < value; i++) {
    		textbox += '<div><input type="text" name="textbox[]" /></div>';
		}
		$("#textbox").html(textbox);
	})
	
});
</script>
<select id="add">
	<option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
</select>
<div id="textbox">

</div>