javascript - Radio button quiz - Stack Overflow|江阴雨辰互联

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.

<!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.

Share Improve this question edited Jul 11, 2013 at 20:20 asked Jul 11, 2013 at 20:03 Balthasar 3234 silver badges12 bronze badges

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

Sorted by: 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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javascript - Radio button quiz - Stack Overflow

3 Answers 3

Syntax errors

JavaScript/jQuery

Live Demo (JSFiddle)

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javascript - Radio button quiz - Stack Overflow

3 Answers 3

Syntax errors

JavaScript/jQuery

Live Demo (JSFiddle)

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