function page_ctrl(data_obj) {
    //分页元素
    var obj_box = (data_obj.obj_box !== undefined) ? data_obj.obj_box : function() { return; };
    //总共数据条数
    var total_item = (data_obj.total_item !== undefined) ? parseInt(data_obj.total_item) : 0;
    //每页显示数据条数
    var per_num = (data_obj.per_num !== undefined) ? parseInt(data_obj.per_num) : 5;
    //当前页数
    var current_page = (data_obj.current_page !== undefined) ? parseInt(data_obj.current_page) : 1;
    //总页数
    var total_page = Math.ceil(total_item / per_num);
    // if (total_page < 2) { return; }
    //插入放数据的div
    $(obj_box).html('<div class="page_content"></div>');

    //插入放页码的div
    $(obj_box).html('<div class="page_ctrl"></div>');

    function page_even() {
        //只能传达数字
        var regPos = /^\d+$/;
        //如果当前页数不是数字
        if (regPos.test(current_page)) {
            current_page = current_page < 1 ? 1 : (current_page > total_page ? total_page : current_page);
        } else {
            current_page = 1;
        }
        //调用 回调函数
        data_obj.change_content(per_num, current_page);
        var inp_val = (current_page == total_page) ? 1 : current_page;
        //分页div前半部分
        var append_html = '<span class="page_total">共 ' + total_page + ' 页</span><button class="iconfont icon-xiangzuo prev_page"></button>';
        //页码数量
        for (var i = 0; i < total_page - 1; i++) {
            if (total_page > 8 && current_page > 6 && i < current_page - 3) {
                if (i < 2) {
                    append_html += '<button class="page_num">' + (i + 1) + '</button>';
                } else if (i == 2) {
                    append_html += '<span class="page_dot">...</span>';
                }
            } else if (total_page > 8 && current_page < total_page - 3 && i > current_page + 1) {
                if (current_page > 6 && i == current_page + 2) {
                    append_html += '<span class="page_dot">...</span>';
                } else if (current_page < 7) {
                    if (i < 8) {
                        append_html += '<button class="page_num">' + (i + 1) + '</button>';
                    } else if (i == 8) {
                        append_html += '<span class="page_dot">...</span>';
                    }
                }
            } else {
                if (i == current_page - 1) {
                    append_html += '<button class="page_num current_page">' + (i + 1) + '</button>';
                } else {
                    append_html += '<button class="page_num">' + (i + 1) + '</button>';
                }
            }
        }
        //生成最后一页
        if (current_page == total_page) {
            append_html += '<button class="page_num current_page">' + (i + 1) + '</button>';
        } else {
            append_html += '<button class="page_num">' + (i + 1) + '</button>';
        }
        //分页div后半部分
        append_html += '<button class="iconfont icon-xiangyou next_page"></button><span class="page_total">到第</span><input class="input_page_num" type="text" ><span class="page_text">页</span><button class="to_page_num">确定</button>';
        $(obj_box).children('.page_ctrl').append(append_html);
        //左右分页按钮监控
        if (current_page == 1) {
            $(obj_box + ' .page_ctrl .prev_page').attr('disabled', 'disabled').addClass('btn_dis');
        } else {
            $(obj_box + ' .page_ctrl .prev_page').removeAttr('disabled').removeClass('btn_dis');
        }
        if (current_page == total_page) {
            $(obj_box + ' .page_ctrl .next_page').attr('disabled', 'disabled').addClass('btn_dis');
        } else {
            $(obj_box + ' .page_ctrl .next_page').removeAttr('disabled').removeClass('btn_dis');
        }
    };
    page_even();
    //给按钮绑定点击事件
    $(obj_box + ' .page_ctrl').on('click', 'button', function() {
        var that = $(this);
        if (that.hasClass('prev_page')) {
            if (current_page != 1) {
                current_page--;
                that.parent('.page_ctrl').html('');
                page_even();
            }
        } else if (that.hasClass('next_page')) {
            if (current_page != total_page) {
                current_page++;
                that.parent('.page_ctrl').html('');
                page_even();
            }
        } else if (that.hasClass('page_num') && !that.hasClass('current_page')) {
            current_page = parseInt(that.html());
            that.parent('.page_ctrl').html('');
            page_even();
        } else if (that.hasClass('to_page_num')) {
            current_page = parseInt(that.siblings('.input_page_num').val());
            that.parent('.page_ctrl').html('');
            page_even();
        }
    });
}