Bootstrap and datepicker
HTML
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.1.0/css/bootstrap.min.css">
<link rel="stylesheet" href="http://eternicode.github.io/bootstrap-datepicker/bootstrap-datepicker/css/datepicker.css">
<script src="http://eternicode.github.io/bootstrap-datepicker/bootstrap-datepicker/js/bootstrap-datepicker.js"></script>
<a data-target="#myModal" role="button" class="btn" data-toggle="modal">Launch demo modal</a>
<div class="modal fade hide" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" data-remote="/mmfansler/aQ3Ge/show/">
<div class="modal-header">
Header
</div>
<div class="input-append date datepicker no-padding" data-date-format="dd-mm-yyyy">
<input class="input-medium" size="16" type="text"><span class="add-on"><i class="icon-th"></i></span>
</div>
<div class="modal-footer">
<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
<button class="btn btn-primary">Save changes</button>
</div>
</div>
<br><br><br>
<div class="input-append date datepicker no-padding" data-date-format="dd-mm-yyyy">
<input class="input-medium" size="16" type="text"><span class="add-on"><i class="icon-th"></i></span>
</div>
JavaScript
$(document).ready(function() {
$('.datepicker').datepicker({
language: "ja",
autoclose: true
});
});