jsp 页面限制页码显示

         var page_num  = 2;//当前页面       var max_show_page = 10;//最多显示分页页数       var max_page = 20;//总页面数       //从第几页开始显示分页信息var start_page = (page_num - Math.ceil(max_show_page / 2));if (start_page < 1) {    start_page = 1;}//分页信息显示到第几页var end_page = page_num + max_show_page/2;if (end_page > max_page) {    end_page = max_page + 1;}       for(var i=start_page;i < end_page;i++){        //页码显示的代码       }