function set_keisan(stanka,ttanka)
{
    var set    = document.keisan.suuryo1.value;
    var tanpin = document.keisan.suuryo0.value;
    var souryo = souryoget();

    var sum    = (set*stanka) + (tanpin*ttanka);
    var sum2   = (set*11) + (tanpin*1);
    var sum3   = (set*souryo*11) + (tanpin*souryo);

    document.getElementById("sum1").innerHTML = sum2;
    document.getElementById("sum2").innerHTML = sum;
    document.getElementById("sum3").innerHTML = sum3;

    if(sum != 0)
    {
        document.getElementById("kbotton").style.display = "block";
    }
    else
    {
        document.getElementById("kbotton").style.display = "none";
        alert("個数を選択して下さい。");
    }
}

function souryoget()
{
    var tiiki = document.keisan.tiiki.value;
    var souryo = 0;

    switch(tiiki)
    {
        case "0":
            souryo = 300;
            break;

        case "1":
            souryo = 350;
            break;

        case "2":
            souryo = 800;
            break;

        default :
            break;
    }

    return souryo;
}