bootstrap模态框居中

API网址：http://www.runoob.com/bootstrap/bootstrap-button-plugin.html
           http://v3.bootcss.com/css/

实现模态框居中：

function centerModals() {$('.modal').each(function(i) {var $clone = $(this).clone().css('display', 'block').appendTo('body');var top = Math.round(($clone.height() - $clone.find('.modal-content').height()) / 2);top = top > 0 ? top : 0;$clone.remove();$(this).find('.modal-content').css("margin-top", top);});}$('.modal').on('show.bs.modal', centerModals);$(window).on('resize', centerModals);