Bootstrap3模态垂直居中

1     <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
2         <div class="modal-dialog modal-lg">
3             <div class="modal-content"></div><!-- /.modal-content -->
4         </div><!-- /.modal -->
5     </div>

1         function openDialog() {
2             var modal = $('#myModal').modal({ keyboard: false, backdrop: 'static'/*,remote: 'Detail?r=' + Math.random()*/ })
3             modal.find('.modal-content').load('Detail', { R: Math.random() });
4         }


 1         $(function () {
 2             function centerModals() {
 3                 $('#myModal').each(function (i) {
 4                     var $clone = $(this).clone().css('display', 'block').appendTo('body');
 5                     var top = Math.round(($clone.height() - $clone.find('.modal-content').height()) / 2);
 6                     top = top > 0 ? top : 0;
 7                     $clone.remove();
 8                     $(this).find('.modal-content').css("margin-top", top);
 9                 });
10             }
11             if ($('#myModal').size() > 0) {
12                 //$('#myModal').on('shown.bs.modal', centerModals);
13                 //$(window).on('resize', centerModals);
14                 setInterval(centerModals, 200);
15             }
16         });