tempus dominus bootstrap 3 multiple date

by barbarina

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment-with-locales.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://rawgit.com/tempusdominus/bootstrap-3/master/build/css/tempusdominus-bootstrap-3.css">
<script src="https://rawgit.com/tempusdominus/bootstrap-3/master/build/js/tempusdominus-bootstrap-3.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="container">
<div id="righeData">
  <!--div class="row" id="row_1">
    <div class="col-sm-6" id="col_1">
      <div class="form-group" id="fg_1">
        <div class="input-group date" id="datetimepicker1" data-target-input="nearest">
          <input type="text" class="form-control datetimepicker-input" data-target="#datetimepicker1" />
          <span class="input-group-addon" data-target="#datetimepicker1" data-toggle="datetimepicker">
                        <span class="fa fa-calendar"></span>
          </span>
          
      <span class="input-group-btn">
      <button class="btn btn-primary" type="button" id="btn_1" data-nr='1'><span class="fa fa-plus"></span></button>
      </span>
        </div>
      </div>
    </div>
  </div-->
</div>
<div class="alert alert-danger" id="alertBastaRighe">
    <button type="button" class="close" data-dismiss="alert">x</button>
    <strong>Attenzione! </strong>
    Non si possono aggiungere altre date da confrontare
</div>
<div class="alert alert-danger" id="alertDataDoppia">
    <button type="button" class="close" data-dismiss="alert">x</button>
    <strong>Attenzione! </strong>
    Data gia' inserita
</div>
 <button type="button" class="btn btn-primary" id="btnOk">ok</button>
   ...

JavaScript

$(function() {
 	   
    $("#alertBastaRighe").hide();
    $("#alertDataDoppia").hide();
    
   var nRighe = 0;
   addRiga(nRighe);

   function addRiga(){
   	nRighe = nRighe+1;
    
     jQuery('<div/>', {
		  class: 'row',
      id: 'row_'+nRighe
		}).appendTo('#righeData');
   jQuery('<div/>', {
		  class: 'col-sm-6',
      id: 'col_'+nRighe
		}).appendTo('#row_'+nRighe);
    jQuery('<div/>', {
		  class: 'form-group',
      id: 'fg_'+nRighe
		}).appendTo('#col_'+nRighe);
    jQuery('<div/>', {
		  class: 'input-group date',
      id: 'datetimepicker'+nRighe,
      'data-target-input': 'nearest'
		}).appendTo('#fg_'+nRighe);
        
    jQuery('<input/>', {
		  class: 'form-control datetimepicker-input',
      type: 'text',
      'data-target': '#datetimepicker'+nRighe
		}).appendTo('#datetimepicker'+nRighe);
    jQuery('<span/>', {
		  class: 'input-group-addon',
      'data-target': '#datetimepicker'+nRighe,
      'data-toggle': 'datetimepicker',
      html: '<span class="fa fa-calendar"></span>'
		}).appendTo('#datetimepicker'+nRighe);
    jQuery('<span/>', {
		  class: 'input-group-btn',
      id: 'btnGrp_'+nRighe
		}).appendTo('#datetimepicker'+nRighe);
    jQuery('<button/>', {
		  class: 'btn btn-primary',
      type: 'button',
      id: 'btn_'+nRighe,
      'data-nr': nRighe,
      html: '<span class="fa fa-plus"></span>',
      disabled: true
		}).appendTo('#btnGrp_'+nRighe);
        
   
    $('#datetimepicker'+nRighe).datetimepicker({
   
     locale: 'it', 
     format: 'L',
     minDate: new Date(2014, 1 - 1, 1),
     maxDate: 'now'
   });
   
   $("#datetimepicker"+nRighe).on("change.datetimepicker", function (e) {
				    $('#btn_'+nRighe).prop('disabled', false);
            
    			 var da = $('.date');
        var questoId = $(this).attr('id');
  $.each(da, function(i, d){
				var v = $('#'+$(d).attr('id')+' > .datetimepicker-input').val();
        
        var altroId = $(d).attr('id');
        
        if(questoId!=altroId){
       ...