function r_click(i, choice, value_list, m) {
    // i : 行号
    // choice : [A,B]
    // value_list : 变化的列
    // m ：行数，用于loop
    // table_id: 用于寻找id_sp_table_id
    document.getElementById("demo").value = i + choice;
    let x;
    let j;
    let y;

    let sp; // sp，本页要输出的结果

    let index; // 点击A和B，sp是不同的
    if (choice === "A") {
        index = i;
    } else {
        index = i - 1;
    }

    // 取得正确的sp，写入sp_{{table_id}}
    let corner = false;

    if ((i === 1 & choice === "B") | (i === 21 & choice === "A"))
        corner = true;


    if (corner) {
        // 边缘行为，点击了A的最后一行，算作最后一行是sp
        sp = 10086;
    } else {
        sp = (value_list[index] + value_list[index - 1]) / 2;
        //sp = 1;
    }

    document.getElementById("id_sp").value = sp

    // 刷新radio选择状态
    for (j = 1; j <= i; j++) {
        x = document.getElementsByName("choice_" + j + "-a");
        x[0].checked = true;
        y = document.getElementsByName("choice_" + j + "-b");
        y[0].checked = false;
    }
    for (j = index + 1; j <= m; j++) {
        x = document.getElementsByName("choice_" + j + "-a");
        x[0].checked = false;
        y = document.getElementsByName("choice_" + j + "-b");
        y[0].checked = true;
    }

    // alert(corner)
    // let btn_next = document.getElementById("divnext");
    let ot = timer_counter;
    // alert(parseInt(ot));
    if (corner === true) {
        // alert("hello");
        real_next(false);
        myModal.show();
    }
    if (parseInt(ot) <= 0 && corner === false && document.getElementById("id_sp").value < 10000) {
        real_next(true);
    }

}

function real_next(is_real) {
    if (is_real) {
        let btn_fake_next = document.getElementById("id_fake_next");
        btn_fake_next.style.display = "none";

        let btn_next = document.getElementById("id_next");
        btn_next.style.display = "block";
    } else {

        let btn_next = document.getElementById("id_next");
        btn_next.style.display = "none";

        let btn_fake_next = document.getElementById("id_fake_next");
        btn_fake_next.style.display = "block";
    }
}