Develop Reference

How do I know if a user has selected an option in a form in html + javascript

I am trying to build a quiz with questions and options but I don't know how to add the options to the quiz. Also, I want to know if I selected the correct option and if the number of correct answers is shown at the end. Can someone help me build this?
I have tried adding options but I can't get the output needed.
<form align="center" id = "test">
Question 1: <input type="radio" name="radiogroup1" value="radio" id="radiogroup1"> Option 1
<input type="radio" name="radiogroup1" value="radio" id="radiogroup2"> Option 2 <br><be>
</form>

See if this helps you: (just an example to get the idea)
function submitAnswers() {
var total = 5;
var score = 0;
//Get user input
var q1 = document.forms["quizForm"]["q1"].value;
var q2 = document.forms["quizForm"]["q2"].value;
var q3 = document.forms["quizForm"]["q3"].value;
var q4 = document.forms["quizForm"]["q4"].value;
var q5 = document.forms["quizForm"]["q5"].value;
// Validation
for (var i = 1; i <= total; i++) {
if (eval('q' + i) == null || eval('q' + i) == '') {
alert("you missed question " + i);
return false;
}
}
//set correct answers
var answers = ["b", "d", "c", "a", "b"]
//check answers
for (var i = 1; i <= total; i++) {
if (eval('q' + i) == answers[i - 1]) {
score++;
}
}
alert('You scored ' + score + " out of " + total);
return false;
}
<div class="container">
<section>
<form name="quizForm" onsubmit="submitAnswers(); return false">
<h3>1. Question number one?</h3>
<input type="radio" name="q1" value="a" id="q1a"> a. answer11<br>
<input type="radio" name="q1" value="b" id="q1b"> b. answer12<br>
<input type="radio" name="q1" value="c" id="q1c"> c. answer13<br>
<input type="radio" name="q1" value="d" id="q1d"> d. answer14<br>
<h3>2. Question number two?</h3>
<input type="radio" name="q2" value="a" id="q2a"> a. answer21<br>
<input type="radio" name="q2" value="b" id="q2b"> b. answer22<br>
<input type="radio" name="q2" value="c" id="q2c"> c. answer23<br>
<input type="radio" name="q2" value="d" id="q2d"> d. answer24<br>
<h3>3. Question number three?</h3>
<input type="radio" name="q3" value="a" id="q3a"> a. answer31<br>
<input type="radio" name="q3" value="b" id="q3b"> b. answer32<br>
<input type="radio" name="q3" value="c" id="q3c"> c. answer33<br>
<input type="radio" name="q3" value="d" id="q3d"> d. answer34<br>
<h3>4. Question number four ?</h3>
<input type="radio" name="q4" value="a" id="q4a"> a. answer41<br>
<input type="radio" name="q4" value="b" id="q4b"> b. answer42<br>
<input type="radio" name="q4" value="c" id="q4c"> c. answer43<br>
<input type="radio" name="q4" value="d" id="q4d"> d. answer44<br>
<h3>5. Question number five ?</h3>
<input type="radio" name="q5" value="a" id="q5a">a. answer51<br>
<input type="radio" name="q5" value="b" id="q5b">b. answer52<br>
<br><br>
<input type="submit" value="Submit Answers">
</form>
</section>
</div>

Sum of Radio button values printed to the user

I'm very new to html.
I have a survey with two questions where the question choices are presented with radio buttons as this html code shows:
<form>
<p id="description">1. Question 1?</p>
<p>
<label><input type="radio" name="q1" value="5" /> Yes</label>
<label><input type="radio" name="q1" value="0" /> No</label>
</p>
<p id="description">2. Question 2?</p>
<p>
<label><input type="radio" name="q2" value="5" /> Yes</label>
<label><input type="radio" name="q2" value="0" /> No</label>
</p>
</form>
I want to print to the user the sum of his two selections.
So the output could be "You score is 10." if he answered yes to both questions etc.
How can I do this in the simplest way with the code being on the same page as the html code above? Is that possible?

var question1Answers = document.getElementsByName('q1');
var question2Answers = document.getElementsByName('q2');
var answer = 0;
question1Answers.forEach((e) => {
if (e.checked) {
answer += e.value;
break;
}
});
question2Answers.forEach((e) => {
if (e.checked) {
answer += e.value;
break;
}
});
console.log(answer);

please try this:
$("input[type='button']").click(function () {
var score = getChecklistItems();
alert("You score is : " + score);
});
function getChecklistItems() {
var total_score = 0
var result = $("input:radio:checked").get();
var checked_value = $.map(result, function (element) {
return $(element).attr("value");
});
for (i = 0; i < checked_value.length; i++) {
total_score += parseInt(checked_value[i])
}
return total_score
}
<form>
<p id="description">1. Question 1?</p>
<p>
<label><input type="radio" name="q1" value="5" /> Yes</label>
<label><input type="radio" name="q1" value="0" /> No</label>
</p>
<p id="description">2. Question 2?</p>
<p>
<label><input type="radio" name="q2" value="5" /> Yes</label>
<label><input type="radio" name="q2" value="0" /> No</label>
</p>
<p><input type="button" value="Submit"></p>
</form>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

javascript function not taking form value?

I am trying to create a really simple radio button quiz with javascript and an html form. When I try to take the form question values and put them into variables, they're not being taken. When I console.log q1 I just get undefined.
I've tried giving the radio buttons id's with getElementById, doesn't work. I've also tried document.forms['infoForm']['question1'].value;
function results() {
event.preventDefault();
var q1 = document.getElementsByName('question1').value;
var q2 = document.getElementsByName('question2').value;
var q3 = document.getElementsByName('question3').value;
var q4 = document.getElementsByName('question4').value;
console.log(q1);
}
<form name="infoForm" id="infoForm" onsubmit="return results();" method="post">
<fieldset>
<legend>Here's a Quiz!</legend>
<div class="question">
quiz question 1<br>
<input type="radio" name="question1" value="W">W<br>
<input type="radio" name="question1" value="R1">R<br>
<input type="radio" name="question1" value="W">W<br>
</div>
<div class="question">
quiz question 2<br>
<input type="radio" name="question2" value="R2">R<br>
<input type="radio" name="question2" value="W">W<br>
<input type="radio" name="question2" value="W">W<br>
</div>
<div class="question">
quiz question 3<br>
<input type="radio" name="question3" value="W">W<br>
<input type="radio" name="question3" value="R3">R<br>
<input type="radio" name="question3" value="W">W<br>
</div>
<div class="question">
quiz question 4<br>
<input type="radio" name="question4" value="W">W<br>
<input type="radio" name="question4" value="W">W<br>
<input type="radio" name="question4" value="R4">R<br>
</div>
<input type="submit" value="Submit">
</fieldset>
</form>
When using console.log() for the question variables I would like to see the value the user has actually chosen, instead of undefined.

.getElementsByName() returns an array of elements. However, using it, and grabbing the first item, will only give you the first item in the in the radio button set, and not the selected radio button.
Since you have name attributes, you can just use the path to get the element like this:
document.infoForm.question1.value
You can then do that for all 4 questions so it looks something like this:
function results() {
event.preventDefault();
var q1 = document.infoForm.question1.value;
var q2 = document.infoForm.question2.value;
var q3 = document.infoForm.question3.value;
var q4 = document.infoForm.question4.value;
console.log(q1, q2, q3, q4);
}
<form name="infoForm" id="infoForm" onsubmit="return results();" method="post">
<fieldset>
<legend>Here's a Quiz!</legend>
<div class="question">
quiz question 1<br>
<input type="radio" name="question1" value="W">W<br>
<input type="radio" name="question1" value="R1">R<br>
<input type="radio" name="question1" value="W">W<br>
</div>
<div class="question">
quiz question 2<br>
<input type="radio" name="question2" value="R2">R<br>
<input type="radio" name="question2" value="W">W<br>
<input type="radio" name="question2" value="W">W<br>
</div>
<div class="question">
quiz question 3<br>
<input type="radio" name="question3" value="W">W<br>
<input type="radio" name="question3" value="R3">R<br>
<input type="radio" name="question3" value="W">W<br>
</div>
<div class="question">
quiz question 4<br>
<input type="radio" name="question4" value="W">W<br>
<input type="radio" name="question4" value="W">W<br>
<input type="radio" name="question4" value="R4">R<br>
</div>
<input type="submit" value="Submit">
</fieldset>
</form>

There are some errors in your code.
The function getElementsByName() returns a NodeList, so you can't access the property value on it. Try to get the first index of it: getElementsByName()[0].value
The variable event is not defined. I guess that you're using the function results as an event listener. If so, the event is sent as a parameter and you need to define it:
function results(event) {
event.preventDefault();
var q1 = document.getElementsByName('question1')[0].value;
var q2 = document.getElementsByName('question2')[0].value;
var q3 = document.getElementsByName('question3')[0].value;
var q4 = document.getElementsByName('question4')[0].value;
console.log(q1);
}

issue with if/else conditions with radio elements

I'm not good with Javascript and I'm trying to build a two-question quiz based on yes-no answers. When I look at the console I see the yes-no values if I do console.log(answer1 + answer3); But the alert doesn't work. If I remove .checked and do equal to true/false the first alert works.
Any help would be appreciated
var answer1 = document.getElementById('q1').value;
var answer2 = document.getElementById('q2').value;
var answer3 = document.getElementById('q3').value;
var answer4 = document.getElementById('q4').value;
if (answer1.checked && answer3.checked) {
alert('walking park');
}
else if (answer1.checked && answer4.checked) {
alert('no walk in park');
}
else if (answer2.checked && answer4.checked ) {
alert('oh noooo!');
}
else if (answer2.checked && answer3.checked) {
alert('cor blimey gov!');
}
<form>
<p>Question 1</p>
<fieldset>
<label for="Question1">Can your dog eat food?</label>
<input type="radio" id="q1" name="question1" value="yes"> Yes<br>
<input type="radio" id="q2" name="question1" value="no"> No
</fieldset>
<p>Question 2</p>
<fieldset>
<label for="Question2">Can your dog run in the park</label>
<input type="radio" id="q3" name="question2" value="yes"> Yes<br>
<input type="radio" id="q4" name="question2" value="no"> No
</fieldset>
<button type="button" id="myBtn" class="btn btn-med btn-brand-one">submit</button>
</form>

Use checked == true or simply checked and remove .value
answer1 = document.getElementById('q1');
answer2 = document.getElementById('q2');
answer3 = document.getElementById('q3');
answer4 = document.getElementById('q4');
function checkanswear(event){
event.preventDefault()
if (answer1.checked && answer3.checked) {
alert('walking park');
}
else if (answer1.checked&& answer4.checked) {
alert('no walk in park');
}
else if (answer2.checked && answer4.checked ) {
alert('oh noooo!');
}
else if (answer2.checked && answer3.checked) {
alert('cor blimey gov!');
}
}
<form>
<p>Question 1</p>
<fieldset>
<label for="Question1">Can your dog eat food?</label>
<input type="radio" id="q1" name="question1" value="yes"> Yes<br>
<input type="radio" id="q2" name="question1" value="no"> No
</fieldset>
<p>Question 2</p>
<fieldset>
<label for="Question2">Can your dog run in the park</label>
<input type="radio" id="q3" name="question2" value="yes"> Yes<br>
<input type="radio" id="q4" name="question2" value="no"> No
</fieldset>
<button onclick="checkanswear(event)" id="myBtn" class="btn btn-med btn-brand-one">submit</button>
</form>

The problem is that the .value of your checkboxes is the string "yes" or "no". Strings don't have a checked attribute.
Solution: Just remove the .value part. Let answer1, answer2, etc be the input elements themselves. Then you can use .checked on them.
Example:
document.getElementById('myBtn').onclick = function() {
var answer1 = document.getElementById('q1');
var answer2 = document.getElementById('q2');
var answer3 = document.getElementById('q3');
var answer4 = document.getElementById('q4');
if (answer1.checked && answer3.checked) {
alert('walking park');
} else if (answer1.checked && answer4.checked) {
alert('no walk in park');
} else if (answer2.checked && answer4.checked) {
alert('oh noooo!');
} else if (answer2.checked && answer3.checked) {
alert('cor blimey gov!');
}
};
<form>
<p>Question 1</p>
<fieldset>
<label for="Question1">Can your dog eat food?</label>
<input type="radio" id="q1" name="question1" value="yes"> Yes<br>
<input type="radio" id="q2" name="question1" value="no"> No
</fieldset>
<p>Question 2</p>
<fieldset>
<label for="Question2">Can your dog run in the park</label>
<input type="radio" id="q3" name="question2" value="yes"> Yes<br>
<input type="radio" id="q4" name="question2" value="no"> No
</fieldset>
<button type="button" id="myBtn" class="btn btn-med btn-brand-one">submit</button>
</form>

JavaScript - How to show the next div and hide the previous one?

I am creating a simple quiz and would like to know how to show one question at a time but only using JavaScript. I do not know jQuery. Essentially, I would like the first question to be shown automatically.
Here is an example of what my HTML looks like:
<div id="q0">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" style="visibility:hidden">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" style="visibility:hidden">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
I currently don't have script for showing next div and hiding the previous one because I don't know how to even start.
I'm looking to have it put into this form...
function nextQ(){
// code
}
... and for it to be called by this button:
<button onclick="next()">Next Question</button>
I am really new to HTML and JavaScript and would appreciate any help.
Thanks.

Pure JavaScript version (config):
var showing = [1, 0, 0];
var questions = ['q0', 'q1', 'q2'];
function next() {
var qElems = [];
for (var i = 0; i < questions.length; i++) {
qElems.push(document.getElementById(questions[i]));
}
for (var i = 0; i < showing.length; i++) {
if (showing[i] == 1) {
qElems[i].style.display = 'none';
showing[i] = 0;
if (i == showing.length - 1) {
qElems[0].style.display = 'block';
showing[0] = 1;
} else {
qElems[i + 1].style.display = 'block';
showing[i + 1] = 1;
}
break;
}
}
}
<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button onclick="next()">Next Question</button>
Pure JavaScript version (no config):
function next() {
var qElems = document.querySelectorAll('#questions>div');
for (var i = 0; i < qElems.length; i++) {
if (qElems[i].style.display != 'none') {
qElems[i].style.display = 'none';
if (i == qElems.length - 1) {
qElems[0].style.display = 'block';
} else {
qElems[i + 1].style.display = 'block';
}
break;
}
}
}
<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none;">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none;">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button onclick="next()">Next Question</button>
jQuery version:
$(function() {
$('.next').on('click', function() {
$('#questions>div').each(function() {
var id = $(this).index();
if ($(this).is(':visible')) {
$(this).hide();
if (id == $('#questions>div').length - 1) {
$('#questions>div').eq(0).show();
} else {
$('#questions>div').eq(id + 1).show();
}
return false;
}
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button class="next">Next Question</button>

Though I agree with #Bitwise on using jQuery instead on javascript alone to ensure cross-browser compatibility. But since you insist on using javascript, here's what you should do.
1) Ensure that your <li>'s are enclosed in a container tag first (say, <ul>) so you iterate only through desired list.
2) use display:none property instead of visibility:hidden. visibility:hidden simply hides an element, but it will still take up the same space as before. display:none hides an element, and it will not take up any space.
Here's the updated code.
HTML:
<ul id="listContainer">
<div id="q0">
<li style="display:list-item">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A"/>Green<br/>
<input type="radio" name="question0" value="B"/>Blue<br/>
<input type="radio" name="question0" value="C"/>Red<br/>
<input type="radio" name="question0" value="D"/>Purple<br/>
</li>
</div>
<div id="q1" >
<li style="display:none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A"/>Water<br/>
<input type="radio" name="question1" value="B"/>Cement<br/>
<input type="radio" name="question1" value="C"/>Trees<br/>
<input type="radio" name="question1" value="D"/>The Sky<br/>
</li>
</div>
<div id="q2" >
<li style="display:none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A"/>24<br/>
<input type="radio" name="question2" value="B"/>22<br/>
<input type="radio" name="question2" value="C"/>16<br/>
<input type="radio" name="question2" value="D"/>48<br/>
</li>
</div>
</ul>
<button id="next">next</button>
Javascript:
document.getElementById('next').addEventListener("click",function(){
var listContainer = document.getElementById("listContainer");
var listItem = listContainer.getElementsByTagName("li");
for (var i=0; i < listItem.length-1; i++)
{
if(listItem[i].style.display == "list-item")
{
listItem[i].style.display = "none";
listItem[i+1].style.display = "list-item";
break;
}
}
});
Here's the fiddle.
Cheers!

I would twist the code a little. Add question class to every div which acts as question i.e .question { display:none }. Add active class to first question (i.e. .active{display:block}, it shows the first question. Look for all divs with question class and add them to a variable, with every next button pressed,remove active class from current question add active class to next div with class question using classList.add and classList.remove of Javascript until last question is reached. Count keeps the current question's number.
I've done it in the codepen http://codepen.io/dwanirdesh/pen/EaQOPg
Or code directly from below:
<div id="q0" class="question active">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" class="question" >
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" class="question">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
<button onclick="next()">Next Question</button>
## CSS ##
.question{
display:none
}
.active{
display:block
}
## JAVASCRIPT ##
var questionNumber=0;
var questions=document.querySelectorAll('.question');
function next(){
questionNumber++;
if(questions.length>questionNumber)
{
document.querySelector('.active').classList.remove('active');
questions[questionNumber].classList.add('active');
}
}

Here is the java script function code. For this to work, you need to make sure that the div display property to be set as or in the html code. Also you need to name the id of the button to be "next" so that it can be hidden on reaching the last button.
function nextQ(){
var blockFound = 0;
var lastQuestion = 0;
var divs = document.getElementsByTagName("div");
for(var i = 0; i < divs.length; i++){
if ( blockFound == 1){
blockFound = 0;
divs[i].style.display = 'block';
}else if ( divs[i].style.display == 'block' ){
if ( i + 2 == divs.length){
lastQuestion = 1;
}
blockFound = 1;
divs[i].style.display = 'none';
}
}
if ( lastQuestion == 1){
document.getElementById('next').style.visibility = 'hidden';
}
}
Html code here.
<div id="q0" style="display:block">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" style="display:none">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" style="display:none">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
<button id="next" onclick="nextQ()">Next Question</button>

Is it what you need?
<div id="q0">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
<button class="next" onclick="goNext(0)">Next Question</button>
</div>
<div id="q1" style="display:none">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
<button class="next" onclick="goNext(1)">Next Question</button>
</div>
<div id="q2" style="display:none">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
<button class="next" onclick="goNext(2)">Next Question</button>
</div>
<script language=javascript>
function goNext(i)
{
document.getElementById("q"+i).style.display = 'none';
i++;
document.getElementById("q"+i).style.display = 'block';
}
</script>