Develop Reference

Radio button calculator with nested if Stateme

I am trying to create a pricing calculator that takes all of the checked radio buttons and pushes them into an array where it is added in the end. However, I would like to have one of the radio buttons take the attribute of the first radio button and multiply it by its own value.
I tried nesting an if statement inside of another if statement but it will only seem to add the values of the first if statement and ignore the second.
$(".w-radio").change(function() {
var totalPrice = 0,
values = [];
$("input[type=radio]").each(function() {
if ($(this).is(":checked")) {
if ($(this).is('[name="catering"]')) {
var cateringFunc = (
$(this).val() * $('[name="gastronomy"]').attr("add-value")
).toString();
values.push($(this).val());
}
values.push($(this).val());
totalPrice += parseInt($(this).val());
}
});
$("#priceTotal span").text(totalPrice);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label class="hack43-radio-group w-radio">
<input type="radio" name="gastronomy" value="0" add-value="10">0<BR>
<input type="radio" name="gastronomy" value="550" add-value="10">550<BR>
<input type="radio" name="gastronomy" value="550" add-value="10">550<BR>
<input type="radio" name="gastronomy" value="550" add-value="10">550<BR>
</label>
<br>
<label class="hack43-radio-group w-radio">
<input type="radio" name="venue" value="0">0<BR>
<input type="radio" name="venue" value="10500">10500<BR>
<input type="radio" name="venue" value="10500">10500<BR>
<input type="radio" name="venue" value="10500">10500<BR>
</label>
<br>
<label class="hack43-radio-group w-radio">
<input type="radio" name="catering" value="0">0<BR>
<input type="radio" name="catering" value="40">40<BR>
<input type="radio" name="catering" value="45">45<BR>
<input type="radio" name="catering" value="60">60<BR>
</label>
<div class="hack42-45-added-value-row">
<div id="priceTotal">
<span>0</span>
</div>
</div>

When the condition is true you should use cateringFunc instead of $(this).val() when pushing into the values array and adding to totalPrice.
I assume you only want to get the added value from the selected radio button, so I added :checked to the selector. Then you also need to provide a default value if none of the gastronomy buttons are checked.
You shouldn't make up new attributes like add-value. If you need custom attributes, use data-XXX. These can be accessed using the jQuery .data() method.
$(".w-radio").change(function() {
var totalPrice = 0,
values = [];
$("input[type=radio]:checked").each(function() {
if ($(this).is('[name="catering"]')) {
var cateringFunc = (
$(this).val() * ($('[name="gastronomy"]:checked').data("add-value") || 0)
);
values.push(cateringFunc.toString());
totalPrice += cateringFunc;
}
values.push($(this).val());
totalPrice += parseInt($(this).val());
});
$("#priceTotal span").text(totalPrice);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label class="hack43-radio-group w-radio">
<input type="radio" name="gastronomy" value="0" data-add-value="10">0<BR>
<input type="radio" name="gastronomy" value="550" data-add-value="10">550<BR>
<input type="radio" name="gastronomy" value="550" data-add-value="10">550<BR>
<input type="radio" name="gastronomy" value="550" data-add-value="10">550<BR>
</label>
<br>
<label class="hack43-radio-group w-radio">
<input type="radio" name="venue" value="0">0<BR>
<input type="radio" name="venue" value="10500">10500<BR>
<input type="radio" name="venue" value="10500">10500<BR>
<input type="radio" name="venue" value="10500">10500<BR>
</label>
<br>
<label class="hack43-radio-group w-radio">
<input type="radio" name="catering" value="0">0<BR>
<input type="radio" name="catering" value="40">40<BR>
<input type="radio" name="catering" value="45">45<BR>
<input type="radio" name="catering" value="60">60<BR>
</label>
<div class="hack42-45-added-value-row">
<div id="priceTotal">
<span>0</span>
</div>
</div>

Why is my counter always equal to zero even after the correct radio button is pressed?

In my Javascript code, I increment the counter when the right radio button is checked but when I check in the console, the counter doesn't get updated after the correct radio button is checked. Even after I click the submit button which calls a function clicked() that displays the counter. The counter still remains zero. Is there a reason why it doesn't get updated. Here is my Java Script code:
var counter = 0;
if (document.getElementById('blue').checked) {
counter++;
}
if (document.getElementById('age3').checked) {
counter++;
}
if (document.getElementById('hobby2').checked) {
counter++;
}
if (document.getElementById('game3').checked) {
counter++;
}
if (document.getElementById('language4').checked) {
counter++;
}
function clicked() {
document.getElementById("result").innerHTML = "You got " + counter;
}
<h1>Quiz</h1>
<form>
<p>(1) What is my favourite Color?</p>
<input type="radio" id="blue" name="color" value="blue">
<label for="blue">blue</label><br>
<input type="radio" id="red" name="color" value="red">
<label for="red">red</label><br>
<input type="radio" id="green" name="color" value="green">
<label for="green">green</label><br>
<input type="radio" id="purple" name="color" value="purple">
<label for="purple">purple</label>
<br>
<p>(2) How Old am I?</p>
<input type="radio" id="age1" name="age" value="20">
<label for="age1">20</label><br>
<input type="radio" id="age2" name="age" value="22">
<label for="age2">22</label><br>
<input type="radio" id="age3" name="age" value="21">
<label for="age3">21</label><br>
<input type="radio" id="age4" name="age" value="23">
<label for="age4">23</label>
<br>
<p>(3) Which of the following is not of a hobby of mine?</p>
<input type="radio" id="hobby1" name="hobby" value="swimming">
<label for="hobby1">swimming</label><br>
<input type="radio" id="hobby2" name="hobby" value="soccer">
<label for="hobby2">soccer</label><br>
<input type="radio" id="hobby3" name="hobby" value="chess">
<label for="hobby3">chess</label><br>
<input type="radio" id="hobby4" name="hobby" value="coding">
<label for="hobby4">coding</label>
<br>
<p>(4) Which of the following is a game that I like?</p>
<input type="radio" id="game1" name="game" value="NBA">
<label for="game1">NBA</label><br>
<input type="radio" id="game2" name="game" value="FortNite">
<label for="game2">FortNite</label><br>
<input type="radio" id="game3" name="game" value="God of War">
<label for="game3">God of War</label><br>
<input type="radio" id="game4" name="game" value="Call of Duty">
<label for="game4">Call of Duty</label>
<p>(5) At what is my favourite language</p>
<input type="radio" id="language1" name="language" value="python">
<label for="language1">python</label><br>
<input type="radio" id="language2" name="language" value="Javascript">
<label for="language2">Javascript</label><br>
<input type="radio" id="language3" name="language" value="C++">
<label for="language3">C++</label><br>
<input type="radio" id="language4" name="language" value="Java">
<label for="language4">Java</label><br><br>
</form>
<button onclick="clicked()">Submit</button>
<p id="result"> </p>

Put all those radio button checkings into a function and call that function when you hit submit. This should solve your problem.
var counter = 0;
function updateCounter(){
if (document.getElementById('blue').checked) {
counter++;
}
if (document.getElementById('age3').checked) {
counter++;
}
if (document.getElementById('hobby2').checked) {
counter++;
}
if (document.getElementById('game3').checked) {
counter++;
}
if (document.getElementById('language4').checked) {
counter++;
}
}
function clicked() {
updateCounter()
document.getElementById("result").innerHTML = "You got " + counter;
//reset the counter back to zero after displaying score
counter = 0
}
<h1>Quiz</h1>
<form>
<p>(1) What is my favourite Color?</p>
<input type="radio" id="blue" name="color" value="blue">
<label for="blue">blue</label><br>
<input type="radio" id="red" name="color" value="red">
<label for="red">red</label><br>
<input type="radio" id="green" name="color" value="green">
<label for="green">green</label><br>
<input type="radio" id="purple" name="color" value="purple">
<label for="purple">purple</label>
<br>
<p>(2) How Old am I?</p>
<input type="radio" id="age1" name="age" value="20">
<label for="age1">20</label><br>
<input type="radio" id="age2" name="age" value="22">
<label for="age2">22</label><br>
<input type="radio" id="age3" name="age" value="21">
<label for="age3">21</label><br>
<input type="radio" id="age4" name="age" value="23">
<label for="age4">23</label>
<br>
<p>(3) Which of the following is not of a hobby of mine?</p>
<input type="radio" id="hobby1" name="hobby" value="swimming">
<label for="hobby1">swimming</label><br>
<input type="radio" id="hobby2" name="hobby" value="soccer">
<label for="hobby2">soccer</label><br>
<input type="radio" id="hobby3" name="hobby" value="chess">
<label for="hobby3">chess</label><br>
<input type="radio" id="hobby4" name="hobby" value="coding">
<label for="hobby4">coding</label>
<br>
<p>(4) Which of the following is a game that I like?</p>
<input type="radio" id="game1" name="game" value="NBA">
<label for="game1">NBA</label><br>
<input type="radio" id="game2" name="game" value="FortNite">
<label for="game2">FortNite</label><br>
<input type="radio" id="game3" name="game" value="God of War">
<label for="game3">God of War</label><br>
<input type="radio" id="game4" name="game" value="Call of Duty">
<label for="game4">Call of Duty</label>
<p>(5) At what is my favourite language</p>
<input type="radio" id="language1" name="language" value="python">
<label for="language1">python</label><br>
<input type="radio" id="language2" name="language" value="Javascript">
<label for="language2">Javascript</label><br>
<input type="radio" id="language3" name="language" value="C++">
<label for="language3">C++</label><br>
<input type="radio" id="language4" name="language" value="Java">
<label for="language4">Java</label><br><br>
</form>
<button onclick="clicked()">Submit</button>
<p id="result"> </p>

Every time you are getting the value as 0 as the login you written is not calling on clicking of radio button.
First thing Just defined the all radio button into a method like below.
function SelectValue () {
counter = 0;
if (document.getElementById('blue').checked)
{
counter++;
}
if (document.getElementById('age3').checked)
{
counter++;
}
if (document.getElementById('hobby2').checked)
{
counter++;
}
if (document.getElementById('game3').checked)
{
counter++;
}
if (document.getElementById('language4').checked)
{
counter++;
}
}
Now there is two way you can call.
Either call that method in each and every method like below.
<p>(1) What is my favourite Color?</p>
<input type="radio" id="blue" name="color" value="blue" onclick="clickmethodthod()">
<label for="blue">blue</label><br>
Write a logic of click and attached to all radio button.
let counter = 0;
const radios = document.querySelector('input[type="radio"]');
for(radio in radios) {
radios[radio].onclick = function() {
SelectValue ()
}
}
Let me know if you are getting any issue.

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>

Trying to use Javascript/CSS to change a property, but can't get it to work within an if/else statement?

So you're my last hope.
I need to create a quiz, that validates name and email. Once the name and email have been validated ONLY THEN will the quiz show up. Thing is, when I put my code of
function changeStyle() {
if (document.getElementById('quiz').style.display == "none") {
document.getElementById('quiz').style.display = "block";
} else {
document.getElementById('quiz').style.display = "none";
}
}
in, my if/else statement it doesn't work. Running this code outside of the if/else statement works, albeit simply on the click of a button. The alert in the if/else statement runs as well, as does the rest of script afterwards. It seems to be just ignoring this script. Here is the Jquery i'm using:
$(document).ready(function() {
$('#contact_name').on('input', function() {
var input = $(this);
var re = /^[A-Za-z0-9]+ [A-Za-z0-9]+$/;
var is_name = re.test(input.val());
if (is_name) {
input.removeClass("invalid").addClass("valid");
} else {
input.removeClass("valid").addClass("invalid");
}
});
$('#contact_email').on('input', function() {
var input = $(this);
var re = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+#[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;
var is_email = re.test(input.val());
if (is_email) {
input.removeClass("invalid").addClass("valid");
} else {
input.removeClass("valid").addClass("invalid");
}
});
$("#contact_submit button").click(function(event) {
var form_data = $("#contact").serializeArray();
var error_free = true;
for (var input in form_data) {
var element = $("#contact_" + form_data[input]['name']);
var valid = element.hasClass("valid");
var error_element = $("span", element.parent());
if (!valid) {
error_element.removeClass("error").addClass("error_show");
error_free = false;
} else {
error_element.removeClass("error_show").addClass("error");
}
}
if (!error_free) {
event.preventDefault();
} else {
alert('This alert is working');
function changeStyle() {
if (document.getElementById('quiz').style.display == "none") {
document.getElementById('quiz').style.display = "block";
} else {
document.getElementById('quiz').style.display = "none";
}
}
}
});
});
CSS:
#quiz{
display:none;
}
Please help! I have tried body:onload aswell, but it seems to just have the same issue. And I've already scoured the internet for answers. I seem to be missing something, I just don't know what.
Thanks
EDIT* changeStyle is being called. Here is the HTML relating to this part.
<form id="contact" method="post" action="">
<!-- Name -->
<div>
<label for="contact_name">Name:</label>
<input type="text" id="contact_name" name="name"></>
<span class="error">This field is required</span>
</div>
<!-- Email -->
<div>
<label for="contact_email">Email:</label>
<input type="email" id="contact_email" name="email"></>
<span class="error">A valid email address is required</span>
</div>
<!-- Submit Button -->
<div id="contact_submit">
<button type="button" onclick="show()">Submit</button> </div>
</form>
<content>
<form id="quiz" name="quiz">
<h1>Test your CSS knowledge!</h1>
<h3>What does CSS stand for?</h3>
<fieldset class="question">
<input type="radio" id="q1a1" class="answer" value="Cascading CSS" data- correct="false" name="q1" ><label for="q1a1">Cascading Css</label><br>
<input type="radio" id="q1b2" class="answer" value="Cascading Style Sheets" data-correct="true" name="q1"><label for="q1b2">Cascading Style Sheets</label><br>
<input type="radio" id="q1c3" class="answer" value="Cascading Seperate Style" data-correct="false" name="q1"><label for="q1c3">Cascading Separate Style</label><br>
</fieldset>
<h3>Which attribute can be set to bold?</h3>
<fieldset class="question">
<input type="radio" id="q2a1" class="answer" value="Text Decoration" data-correct="false" name="q2" ><label for="q2a1">Text Decoration</label><br>
<input type="radio" id="q2b2" class="answer" value="Font Style" data-correct="false" name="q2"><label for="q2b2">Font Style</label><br>
<input type="radio" id="q2c3" class="answer" value="Font Weight" data-correct="true" name="q2"><label for="q2c3">Font Weight</label><br>
</fieldset>
<h3>Which tag is used to link an external CSS file?</h3>
<fieldset class="question">
<input type="radio" id="q3a1" class="answer" value="Script" data-correct="false" name="q3" ><label for="q3a1">Script</label><br>
<input type="radio" id="q3b2" class="answer" value="Link" data-correct="true" name="q3"><label for="q3b2">Link</label><br>
<input type="radio" id="q3c3" class="answer" value="Rel" data-correct="false" name="q3"><label for="q3c3">Rel</label><br>
</fieldset>
<h3>Which attribute sets the underline property?</h3>
<fieldset class="question">
<input type="radio" id="q4a1" class="answer" value="Font Style" data-correct="false" name="q4" ><label for="q4a1">Font Style</label><br>
<input type="radio" id="q4b2" class="answer" value="Text Decoration" data-correct="true" name="q4"><label for="q4b2">Text Decoration</label><br>
<input type="radio" id="q4c3" class="answer" value="Font Weight" data-correct="false" name="q4"><label for="q4c3">Font Weight</label><br>
</fieldset>
<h3>Which element is NOT relative?</h3>
<fieldset class="question">
<input type="radio" id="q5a1" class="answer" value="Px" data-correct="true" name="q5" ><label for="q5a1">Px</label><br>
<input type="radio" id="q5b2" class="answer" value="Cm" data-correct="false" name="q5"><label for="q5b2">Cm</label><br>
<input type="radio" id="q5c3" class="answer" value="%" data-correct="false" name="q5"><label for="q5c3">%</label><br>
<input type="radio" id="q5d4" class="answer" value="Em" data-correct="false" name="q5"><label for="q5d4">Em</label><br>
</fieldset>
<h3>Which element IS relative?</h3>
<fieldset class="question">
<input type="radio" id="q6a1" class="answer" value="Em" data-correct="true" name="q6" ><label for="q6a1">Em</label><br>
<input type="radio" id="q6b2" class="answer" value="Cm" data-correct="false" name="q6"><label for="q6b2">Cm</label><br>
<input type="radio" id="q6c3" class="answer" value="MM" data-correct="false" name="q6"><label for="q6c3">MM</label><br>
<input type="radio" id="q6d4" class="answer" value="Inch" data-correct="false" name="q6"><label for="q6d4">Inch</label><br>
</fieldset>
<h3>What attribute is used to move an elements content away from its border?</h3>
<fieldset class="question">
<input type="radio" id="q7a1" class="answer" value="Margin" data-correct="false" name="q7" ><label for="q7a1">Margin</label><br>
<input type="radio" id="q7b2" class="answer" value="Padding" data-correct="true" name="q7"><label for="q7b2">Padding</label><br>
<input type="radio" id="q7c3" class="answer" value="Border" data-correct="false" name="q7"><label for="q7c3">Border</label><br>
<input type="radio" id="q74d" class="answer" value="Width" data-correct="false" name="q7"><label for="q7d4">Width</label><br>
</fieldset>
<h3>Which element does not contribute to a block elements total width?</h3>
<fieldset class="question">
<input type="radio" id="q8a1" class="answer" value="Width" data-correct="false" name="q8" ><label for="q8a1">Width</label><br>
<input type="radio" id="q8b2" class="answer" value="Border" data-correct="false" name="q8"><label for="q8b2">Border</label><br>
<input type="radio" id="q8c3" class="answer" value="Background-image" data-correct="true" name="q8"><label for="q8c3">Background-image</label><br>
<input type="radio" id="q8d4" class="answer" value="Padding" data-correct="false" name="q8"><label for="q8d4">Padding</label><br>
</fieldset>
<h3>Which property changes positioned elements display order?</h3>
<fieldset class="question">
<input type="radio" id="q9a1" class="answer" value="Width" data-correct="false" name="q9" ><label for="q9a1">Width</label><br>
<input type="radio" id="q9b2" class="answer" value="Background" data-correct="false" name="q9"><label for="q9b2">Background</label><br>
<input type="radio" id="q9c3" class="answer" value="z-index" data-correct="true" name="q9"><label for="q9c3">Z-index</label><br>
<input type="radio" id="q9d4" class="answer" value="Azimuth" data-correct="false" name="q9"><label for="q9d4">Azimuth</label><br>
</fieldset>
<h3>Which value of background-repeat will cause the background to repeat vertically?</h3>
<fieldset class="question">
<input type="radio" id="q10a1" class="answer" value="repeat-x" data-correct="false" name="q10" ><label for="q10a1">repeat-x</label><br>
<input type="radio" id="q10b2" class="answer" value="repeat" data-correct="false" name="q10"><label for="q10b2">repeat</label><<br>
<input type="radio" id="q10c3" class="answer" value="repeat-y" data-correct="true" name="q10"><label for="q10c3">repeat-y</label><br>
<input type="radio" id="q10d4" class="answer" value="No-repeat" data-correct="false" name="q10"><label for="q10d4">No-repeat</label><br>
</fieldset>
<footer>
<fieldset class="calc-percentage" name="score">
<input type="button" id="calc" value="Get score" />
<div>
<p><label for="percentage">Score = </label><input type=text size=15 id="percentage" name="percentage" /></p>
<input type="submit" onclick="checkQuiz()">
</div>
</fieldset>

You only redefine function changeStyle(){}, never calling it. Also, if you're going to use jQuery then use it. Just use .css(), if you don't want to .toggle(). Get rid of onclick='changeStyle()' in your HTML.
Despite all of your other possible errors:
$(document).ready(function(){
$('#contact_name').on('input', function(){
var input = $(this);
var re = /^[A-Za-z0-9]+ [A-Za-z0-9]+$/;
var is_name = re.test(input.val());
if(is_name){
input.removeClass('invalid').addClass('valid');
}
else{
input.removeClass('valid').addClass('invalid');
}
});
$('#contact_email').on('input', function(){
var input = $(this);
var re = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+#[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;
var is_email = re.test(input.val());
if(is_email){
input.removeClass('invalid').addClass('valid');
}
else {
input.removeClass('valid').addClass('invalid');
}
});
$('#contact_submit button').click(function(event){
var form_data = $('#contact').serializeArray(), error_free = true;
for(var input in form_data){
var element = $('#contact_' + form_data[input]['name']);
var valid = element.hasClass('valid');
var error_element = $('span', element.parent());
if(!valid){
error_element.removeClass('error').addClass('error_show');
error_free = false;
}
else{
error_element.removeClass('error_show').addClass('error');
}
}
if(!error_free){
event.preventDefault();
}
else{
// look what changed here - you have to call a function to execute it
$('#quiz').css('display', 'block');
}
});
});
Again get rid of your regular JavaScript function changeStyle() and remove it from HTML, as well!!!

Checking checked in group radio buttons - validate

I have:
<div class="group">
<input type="radio" name="myradio" value="1">a
<input type="radio" name="myradio" value="2">b
</div>
<div class="group">
<input type="radio" name="two" value="3">a
<input type="radio" name="two" value="4">b
</div>
<div class="group">
<input type="radio" name="aaa" value="5">a
<input type="radio" name="aaa" value="6">b
</div>
http://jsfiddle.net/jz84u/2/
How can i check if minimum one group is checked in this example? If no then should be alert('error').
I would like use jQuery.
$(".group").each(function(){
})
but how can i check this? For my example should be return error - any input is checked, but if i have:
<div class="group">
<input type="radio" name="myradio" value="1">a
<input type="radio" name="myradio" value="2">b
</div>
<div class="group">
<input type="radio" name="two" value="3">a
<input type="radio" name="two" value="4" checked="checked">b
</div>
<div class="group">
<input type="radio" name="aaa" value="5">a
<input type="radio" name="aaa" value="6">b
</div>
for this example is ok - input in second group is checked.
How can i validate this?

Will this fit your needs?
var n = $(".group input:checked").length;
if(n>0){do something}

Try like below it will work...
Add a button
<input type="button" value="check" id="btnCheck">
<div class="group">
<input type="radio" name="myradio" value="1">a
<input type="radio" name="myradio" value="2">b
</div>
<div class="group">
<input type="radio" name="two" value="3">a
<input type="radio" name="two" value="4">b
</div>
<div class="group">
<input type="radio" name="aaa" value="5">a
<input type="radio" name="aaa" value="6">b
</div>
write a jquery like below
$("#btnCheck").click(function() {
if($(".group input:radio:checked").val())
alert("checked");
else
alert("Nothing checked");
});
Fiddle : http://jsfiddle.net/jz84u/6/