function test()
{
    document.getElementById("demo").style.color = "red";
    document.getElementById("demo").style.backgroundColor = "yellow";
    document.getElementById("demo").innerHTML = "Title!";
}
var nextquestion;
function startQuiz()
{
    nextquestion = 1;
    document.getElementById("test1").style.display = "block";
    document.getElementById("strt").disabled = "true";
}

function tog()
{
    var chk1 = document.getElementById("tgl1"+nextquestion)
    var chk2 = document.getElementById("tgl2"+nextquestion)
    if (chk1.checked==true && chk2.checked != true)
    {
        document.getElementById("answer"+nextquestion).innerHTML = "correct";
        document.getElementById("answer"+nextquestion).style.color = "#00ff00";
    } else
    {
        document.getElementById("answer"+nextquestion).innerHTML = "incorrect";
        document.getElementById("answer"+nextquestion).style.color = "#ff0000";
    }
    document.getElementById("answer"+nextquestion).style.display = "block";
    document.getElementById("tgl1"+nextquestion).disabled = "true";
    document.getElementById("tgl2"+nextquestion).disabled = "true";
    document.getElementById("sub1").disabled = "true";
    nextquestion = nextquestion + 1;
    document.getElementById("test"+nextquestion).style.display = "block";
    
}