bootstarp modal框居中显示的实现代码

this.$element.css({   paddingLeft: !this.bodyIsOverflowing && modalIsOverflowing ? this.scrollbarWidth : '',   paddingRight: this.bodyIsOverflowing && !modalIsOverflowing ? this.scrollbarWidth : ''})

 // 是弹出框居中  var $modal_dialog = $(this.$element[0]).find('.modal-dialog');  var m_top = ( $(window).height() - $modal_dialog.height() )/2;  $modal_dialog.css({'margin': m_top + 'px auto'}); }