eternicode Datepicker and Bootstrap3 checkin checkout

Question

Edit: Got solution in answer.

Can some expert help me with the javascript code?

I have eternicode Datepicker working with bootstrap3 (it works when click to select a date) https://github.com/eternicode/bootstrap-datepicker/tree/bs3

But now I have two dates, Checkin and Checkout and I want to: When selecting checkout, it disables the days <= Checkin. When selecting checkin, if it is after checkout, change the checkout to +1 day after the checkin selected.

I have some html and javascript code but it doesn't work very well: When I select checkin, the checkout day is the Today day, and it must be selected checkin + 1day. When I select checkout, it only disables the days before the current day, only works if i select a day after the checkin day.

It seams that it is some problem with setValue of checkout.

The html code (inputs):

    <div class="form-group">
    <label for="DtChkIn">Data Checkin</label>
        <div class="input-group date" id="dp1">
        <span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>
        <input type="text" class="form-control input-sm" id="DtChkIn" placeholder="Data CheckIn" readonly="readonly">
        </div>
</div>
<div class="form-group">
    <label for="DtChkOut">Data Checkout</label>
        <div class="input-group date" id="dp2">
        <span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>
        <input type="text" class="form-control input-sm" id="DtChkOut" placeholder="Data CheckOut" readonly="readonly">
        </div>
</div>

And the javascript:

var nowTemp = new Date();
var now = new Date(nowTemp.getFullYear(), nowTemp.getMonth(), nowTemp.getDate(), 0, 0, 0, 0);

var checkin = $('#dp1').datepicker({
    language: "pt",
    format: "dd/mm/yyyy",
    beforeShowDay: function (date) {
        return date.valueOf() < now.valueOf() ? false : '';
    }
}).on('changeDate', function (ev) {
    if (ev.date.valueOf() > checkout.date.valueOf()) {
        var newDate = new Date(ev.date);
        newDate.setDate(newDate.getDate() + 1);

        checkout.setValue(newDate);
    }

    checkin.hide();
    $('#DtChkOut').focus();
}).data('datepicker');

var checkout = $('#dp2').datepicker({
    language: "pt",
    format: "dd/mm/yyyy",
    beforeShowDay: function (date) {
        return date.valueOf() <= checkin.date.valueOf() ? false : '';
    }
}).on('changeDate', function (ev) {
    checkout.hide();
}).data('datepicker');

Answer 1

SOLUTiON: The script that works with eternicode datepicker bs3 branch (checkin checkout)

var nowTemp = new Date();
var now = new Date(nowTemp.getFullYear(), nowTemp.getMonth(), nowTemp.getDate(), 0, 0, 0, 0);

var checkin = $('#dp1').datepicker({

    beforeShowDay: function (date) {
        return date.valueOf() >= now.valueOf();
    }
}).on('changeDate', function (ev) {
    if (ev.date.valueOf() > checkout.date.valueOf()) {
        var newDate = new Date(ev.date)
        newDate.setDate(newDate.getDate() + 1);
        checkout.setValue(newDate);
        checkout.setDate(newDate);
        checkout.update();
    }
    checkin.hide();
    $('#dp2')[0].focus();
}).data('datepicker');
var checkout = $('#dp2').datepicker({
    beforeShowDay: function (date) {
        return date.valueOf() > checkin.date.valueOf();
    }
}).on('changeDate', function (ev) {
    checkout.hide();
}).data('datepicker');

Notice the lines added to update checkin date before comparing to checkout date:

   checkout.setDate(newDate);
   checkout.update();