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    javascript - Radio button quiz - Stack Overflow

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    I'm trying to create a "quiz" using JavaScript/Html. Before I begin, I'd just like to say that I was introduced to this language 4 hours ago as of this posting, so please, please be patient with me. This is what I've written so far:

    <!DOCTYPE html>
<html>
<body>

<form name="input" action="html_form_action.asp" method="get">
<input type="radio" name="Q1" value="A1">A1<br>
<input type="radio" name="Q1" value="A2">A2<br>
<input type="radio" name="Q1" value="A3">A3<br>
<input type="radio" name="Q1" value="A4">A4<br><br>
<input type="radio" name="Q2" value="A1">A1<br>
<input type="radio" name="Q2" value="A2">A2<br>
<input type="radio" name="Q2" value="A3">A3<br>
<input type="radio" name="Q2" value="A4">A4<br><br>
<input type="radio" name="Q3" value="A1">A1<br>
<input type="radio" name="Q3" value="A2">A2<br>
<input type="radio" name="Q3" value="A3">A3<br>
<input type="radio" name="Q3" value="A4">A4<br><br>
<input type="radio" name="Q4" value="A1">A1<br>
<input type="radio" name="Q4" value="A2">A2<br>
<input type="radio" name="Q4" value="A3">A3<br>
<input type="radio" name="Q4" value="A4">A4<br><br>
<input type="radio" name="Q5" value="A1">A1<br>
<input type="radio" name="Q5" value="A2">A2<br>
<input type="radio" name="Q5" value="A3">A3<br>
<input type="radio" name="Q5" value="A4">A4<br><br>
<input type="radio" name="Q6" value="A1">A1<br>
<input type="radio" name="Q6" value="A2">A2<br>
<input type="radio" name="Q6" value="A3">A3<br>
<input type="radio" name="Q6" value="A4">A4<br><br>
<input type="radio" name="Q7" value="A1">A1<br>
<input type="radio" name="Q7" value="A2">A2<br>
<input type="radio" name="Q7" value="A3">A3<br>
<input type="radio" name="Q7" value="A4">A4<br><br>
<input type="radio" name="Q8" value="A1">A1<br>
<input type="radio" name="Q8" value="A2">A2<br>
<input type="radio" name="Q8" value="A3">A3<br>
<input type="radio" name="Q8" value="A4">A4<br><br>
<input type="radio" name="Q9" value="A1">A1<br>
<input type="radio" name="Q9" value="A2">A2<br>
<input type="radio" name="Q9" value="A3">A3<br>
<input type="radio" name="Q9" value="A4">A4<br><br>
<input type="radio" name="Q10" value="A1">A1<br>
<input type="radio" name="Q10" value="A2">A2<br>
<input type="radio" name="Q10" value="A3">A3<br>
<input type="radio" name="Q10" value="A4">A4<br><br>
<script>

function checkTest()
{
var count = 0;
if ($('input:radio[name=Q1]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q2]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q3]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q4]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q5]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q6]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q7]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q8]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q9]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q10]:checked').val() == A1);
{
count = count + 1;
}
if (count > 6)
{
alert("Congratulations! You Passed!");
}
else
{
alert("You answered too many questions incorrectly. Try again.");
}
}
</script>
<button type="button" onclick="checkTest()">Submit Test!</button>
</form>

    I would think that if I just chose "A1" for all my answers, I would get the Congratulations alert, but I don't get anything at all. I got the

    ($('input:radio[name=Q10]:checked').val()

    straight from a different post on this website, so I don't think that it's the problem. Please help!!

    EDIT: I understand that Javascript is a bad way to do this, but I really am just trying to get the language down, and, besides, this would only be used on an extremely small scale.

    I'm trying to create a "quiz" using JavaScript/Html. Before I begin, I'd just like to say that I was introduced to this language 4 hours ago as of this posting, so please, please be patient with me. This is what I've written so far:

    <!DOCTYPE html>
<html>
<body>

<form name="input" action="html_form_action.asp" method="get">
<input type="radio" name="Q1" value="A1">A1<br>
<input type="radio" name="Q1" value="A2">A2<br>
<input type="radio" name="Q1" value="A3">A3<br>
<input type="radio" name="Q1" value="A4">A4<br><br>
<input type="radio" name="Q2" value="A1">A1<br>
<input type="radio" name="Q2" value="A2">A2<br>
<input type="radio" name="Q2" value="A3">A3<br>
<input type="radio" name="Q2" value="A4">A4<br><br>
<input type="radio" name="Q3" value="A1">A1<br>
<input type="radio" name="Q3" value="A2">A2<br>
<input type="radio" name="Q3" value="A3">A3<br>
<input type="radio" name="Q3" value="A4">A4<br><br>
<input type="radio" name="Q4" value="A1">A1<br>
<input type="radio" name="Q4" value="A2">A2<br>
<input type="radio" name="Q4" value="A3">A3<br>
<input type="radio" name="Q4" value="A4">A4<br><br>
<input type="radio" name="Q5" value="A1">A1<br>
<input type="radio" name="Q5" value="A2">A2<br>
<input type="radio" name="Q5" value="A3">A3<br>
<input type="radio" name="Q5" value="A4">A4<br><br>
<input type="radio" name="Q6" value="A1">A1<br>
<input type="radio" name="Q6" value="A2">A2<br>
<input type="radio" name="Q6" value="A3">A3<br>
<input type="radio" name="Q6" value="A4">A4<br><br>
<input type="radio" name="Q7" value="A1">A1<br>
<input type="radio" name="Q7" value="A2">A2<br>
<input type="radio" name="Q7" value="A3">A3<br>
<input type="radio" name="Q7" value="A4">A4<br><br>
<input type="radio" name="Q8" value="A1">A1<br>
<input type="radio" name="Q8" value="A2">A2<br>
<input type="radio" name="Q8" value="A3">A3<br>
<input type="radio" name="Q8" value="A4">A4<br><br>
<input type="radio" name="Q9" value="A1">A1<br>
<input type="radio" name="Q9" value="A2">A2<br>
<input type="radio" name="Q9" value="A3">A3<br>
<input type="radio" name="Q9" value="A4">A4<br><br>
<input type="radio" name="Q10" value="A1">A1<br>
<input type="radio" name="Q10" value="A2">A2<br>
<input type="radio" name="Q10" value="A3">A3<br>
<input type="radio" name="Q10" value="A4">A4<br><br>
<script>

function checkTest()
{
var count = 0;
if ($('input:radio[name=Q1]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q2]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q3]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q4]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q5]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q6]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q7]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q8]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q9]:checked').val() == A1);
{
count = count + 1;
}
if ($('input:radio[name=Q10]:checked').val() == A1);
{
count = count + 1;
}
if (count > 6)
{
alert("Congratulations! You Passed!");
}
else
{
alert("You answered too many questions incorrectly. Try again.");
}
}
</script>
<button type="button" onclick="checkTest()">Submit Test!</button>
</form>

    I would think that if I just chose "A1" for all my answers, I would get the Congratulations alert, but I don't get anything at all. I got the

    ($('input:radio[name=Q10]:checked').val()

    straight from a different post on this website, so I don't think that it's the problem. Please help!!

    EDIT: I understand that Javascript is a bad way to do this, but I really am just trying to get the language down, and, besides, this would only be used on an extremely small scale.

    • javascript
    • html
    • radio-button
    Share Improve this question edited Jul 11, 2013 at 20:20 Balthasar asked Jul 11, 2013 at 20:03 BalthasarBalthasar 3234 silver badges12 bronze badges 2
    • 2 JavaScript is a horrible way to validate a quiz, anyone can see the answers. – SeinopSys Commented Jul 11, 2013 at 20:05
    • You're missing the jQuery library, which is what allows you to do $('input:radio[name=Q10]:checked').val(). As a javascript beginner, I would suggest you learn the basics before using a library such as jQuery. – jbabey Commented Jul 11, 2013 at 20:09
    Add a ment  | 

    3 Answers 3

    Reset to default 4

    Add the following just before the <body> tag:

    <head>
    <script type="text/javascript" src="http://code.jquery./jquery-1.9.1.js"></script>
</head>

    This loads jQuery into your page, letting you use the $ object.

    Syntax errors

    • You have put ; at the end of each if statement, preventing them from executing code if the condition is met or not!
    • You wrote == "A1" part the wrong way: == A1, making JavaScript try to pare the selected object value to an empty variable called A1.

    JavaScript/jQuery

    function checkTest() {
    var count = 0;

    if ($('input[type="radio"][name=Q1]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q2]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q3]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q4]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q5]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q6]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q7]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q8]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q9]:checked').val() == "A1") {
        count++;
    }
    if ($('input[type="radio"][name=Q10]:checked').val() == "A1") {
        count++;
    }
    if (count > 6) {
        alert("Congratulations! You Passed!");
    } else {
        alert("You answered too many questions incorrectly. Try again.");
    }
}

    Live Demo (JSFiddle)

    PS: I would highly remend you not to use jQuery if you just started coding HTML and JavaScript.

    ($('input:radio[name=Q10]:checked').val() // belongs to jQuery

    You're using jquery, so add the respective scripts in it.

    Also you id statements should be

    if ($('input:radio[name=Q1]:checked').val() === 'A1');

    missing ''(quotes) on right hand side value and it is better to use === instead of ==.

    Your checkTest function can be shortened, because in a group of radio buttons, only one can be checked anyways:

    function checkTest() {
    var count = 0;

    for (var i=0,$el=$('input[type="radio"]:checked'),size=$el.size(); i<size; i++){ if ($el.eq(i).val() === 'A1') count++; }

    if (count > 6) alert("Congratulations! You Passed!");
    else alert("You answered too many questions incorrectly. Try again.");
}

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