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');

 varm_top = ( $(window).height() - $modal_dialog.height() )/2;

 $modal_dialog.css({'margin': m_top +'px auto'});

}