var id = 0;
var interval = 200; // 速さ
var interval2 = 1000;   // 解答枠登場まで
var st = 0;
var answer = 0;
var num = 10;   // 数字の個数
var idx = 0;
var ar = new Array();
function s(f){
    if(st == 0){    // これから開始
        interval = document.forms[0].speed.value;
        interval = Math.ceil(interval / 2);
        num = document.forms[0].cnt.value;
        col = document.forms[0].col.value;
        st = 1;
        idx = 0;
        f.b1.value = "答え合わせ";
        //f.b1.hidden = true;
        document.forms[0].ans.value = "";
        document.getElementById('a').style.visibility='hidden';
        document.getElementById('cond').style.visibility='hidden';
        document.getElementById('r').style.visibility='hidden';
        document.getElementById('r2').style.visibility='hidden';
        document.getElementById('d_b1').style.visibility='hidden';
        //f.b1.style.visibility='hidden';
        //f.b1.disebled = true;
        switch (eval(col)) {
            case 1: col1=8;      col2=1;      fs=50; break;
            case 2: col1=89;     col2=10;     fs=50; break;
            case 3: col1=899;    col2=100;    fs=50; break;
            case 4: col1=8999;   col2=1000;   fs=50; break;
            case 5: col1=89999;  col2=10000;  fs=50; break;
            case 6: col1=899999; col2=100000; fs=50; break;
            default:col1=8;   col2=1;   break;
        }
        document.getElementById('q').style.fontsize=fs;
        for(i = 0; i < num; i++){
            tmp = Math.ceil(Math.random()*col1+col2);
            ar[i] = tmp;
            answer = answer + ar[i];
        }
        /*****　
        for(i = 0; i < num; i++){
            alert(ar[i]);
        }
        　*****/
        gen_q();
    } else {
        // st = 0;
        verify_a();
    }
}

function gen_q(){
    document.getElementById("q").innerHTML = "　";
    id = setTimeout("gen_q2()", interval);
}

function gen_q2(){
    document.getElementById("q").innerHTML = ar[idx];
    idx = idx + 1;
    if(idx >= num) {
        end_q();
    } else {
        id = setTimeout("gen_q()", interval);
    }
}


function end_q(){
    setTimeout(function() {
        document.getElementById("q").innerHTML = "　";}, interval);
    clearTimeout(id);

    setTimeout(function() {
        document.getElementById('a').style.visibility='visible';
        document.getElementById('d_b1').style.visibility='visible';
        document.forms[0].ans.focus();}, interval2);
        // document.forms[0].ans.value = answer;
}

function verify_a(){
    if (document.forms[0].ans.value == answer) {
        tmp = "<font color='blue'>○正解！</font>"
        document.getElementById('r').style.visibility='visible';
        document.getElementById('r').innerHTML = tmp;
    } else {
        tmp = "<font color='red'>×間違い！</font></br>"
        tmp2 = "正解は";
        /*****　
        for(i = 0; i < num; i++){
            tmp2 += ar[i];
            if (i < num - 1) {
                tmp2 += " ＋ ";
            }
        }
        　*****/
        tmp2 += " " + answer + "";
        document.getElementById('r').style.visibility='visible';
        document.getElementById('r2').style.visibility='visible';
        document.getElementById('r').innerHTML = tmp;
        document.getElementById('r2').innerHTML = tmp2;
    }
    document.forms[0].b1.value = "スタート";
    document.forms[0].b1.disebled = false;
    document.getElementById('cond').style.visibility='visible';
    st = 0;
    answer = 0;
}