Save result checkboxes checked in form into sqlite database with javascript - javascript

I have a form in my app with several checkboxen. I want the result(value) of the checked checkedboxes saved into separate rows in the database, see below. The problem is that when saving, only the first one (Ma) is saved and the other ones not eventhough the are checked in the form. When MA is not checkend nothing happens at all... I use JqueryMobile/JavaScript/PhoneGap Build
Form:
<form name="test">
<label class="label_check" id="l1" for="ch1">Ma
<input class="custom" type="checkbox" name="checkgroup" id="ch1" value="Ma" />
</label>
<label class="label_check" id="l2" for="ch2">Di
<input class="custom" type="checkbox" name="checkgroup" id="ch2" value="Di" checked />
</label>
<label class="label_check" id="l3" for="ch3">Woe
<input class="custom" type="checkbox" name="checkgroup" id="ch3" value="Woe" />
</label>
<label class="label_check" id="l4" for="ch4">Do
<input class="custom" type="checkbox" name="checkgroup" id="ch4" value="Do" />
</label>
<label class="label_check" id="l5" for="ch5">Vr
<input class="custom" type="checkbox" name="checkgroup" id="ch5" value="Vr" checked />
</label>
<label class="label_check" id="l6" for="ch6">Za
<input class="custom" type="checkbox" name="checkgroup" id="ch6" value="Za" />
</label>
<label class="label_check" id="l7" for="ch7">Zo
<input class="custom" type="checkbox" name="checkgroup" id="ch7" value="Zo" />
</label>
</form>
</p>
<p>
<input type="button" name="saveData" id="btn1" value="Save" onclick="saveRecordSafety();"/>
Javascript:
function saveRecordSafety() {
//Write the record to the database
theDBbeter.transaction(insertRecordSafety, onTxErrorB, onTxSuccessB);
}
function insertRecordSafety(txb) {
var elementen = document.getElementsByName ("checkgroup");
var tmpChoise;
for (var r= 0; r < elementen.lenght; r++);
if (elementen[r].checked) {
tmpChoise = elementen[r].value;
alert(tmpChoise);
var sqlStrB = 'INSERT INTO testSafetyBeter (beter) VALUES (?)';
txb.executeSql(sqlStrB, [tmpChoise], onSqlSuccess, onSqlError);
}
}

I think the problem is because of your for loop being terminated by a semicolon:
for (var r= 0; r < elementen.lenght; r++);
Try this:
function insertRecordSafety(txb) {
var elementen = document.getElementsByName ("checkgroup");
var tmpChoise;
for (var r= 0; r < elementen.length; r++)
{
if (elementen[r].checked)
{
tmpChoise = elementen[r].value;
alert(tmpChoise);
var sqlStrB = 'INSERT INTO testSafetyBeter (beter) VALUES (?)';
txb.executeSql(sqlStrB, [tmpChoise], onSqlSuccess, onSqlError);
}
}
}
I've also spaced things out to make it easier to read.

Related

TypeError: Cannot set properties of undefined (setting 'checked') in javascript

<article id="mission">
<img src="https://blog.kakaocdn.net/dn/TfNOJ/btqNXGzXt1z/1Zlb8W1gitIt6WOPWS7z3k/img.gif" width="100%" />
</article>
<article id="container">
<button></button>
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
</article>
<script src="./main.js"></script>
let inputlist = document.querySelectorAll('input');
let button = document.querySelector('button');
let save = 0;
let num = 0;
button.addEventListener('click',()=>{
for(let i = 0; i< 4; i++){
inputlist[(i+save)%14].checked = true;
}
num++;
if(save-1 != -1){
if(inputlist[(save-1)%14].checked == true){
inputlist[(save-1)%14].checked =false;
}
}
save++;
});
When I run the code, it doesn't work any more than 7-8 clicks.
When you enter the link in the body, the first input element should behave like the image that appears.
But I get the error TypeError: Cannot set properties of undefined (setting 'checked') and it doesn't work anymore.
Why?
You have 13 inputs so it should be mod 13 not 14.
Check the snippet below
let inputlist = document.querySelectorAll('input');
let button = document.querySelector('button');
let save = 0;
let num = 0;
button.addEventListener('click',()=>{
for(let i = 0; i < 4; i++){
inputlist[(i + save) % 13].checked = true;
}
num++;
if(save - 1 !== -1){
if(inputlist[(save - 1) % 13].checked === true){
inputlist[(save - 1) % 13].checked = false;
}
}
save++;
});
<article id="mission">
<img src="https://blog.kakaocdn.net/dn/TfNOJ/btqNXGzXt1z/1Zlb8W1gitIt6WOPWS7z3k/img.gif" width="100%" />
</article>
<article id="container">
<button>Move</button>
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
</article>
Looking at your code, you're using %14, but you only have 12 input elements on the page. When the code is running through the loop you run out of elements. The solution is to either change your %14 to %12 or to add in an additional two input elements.
The other option if you're going to add checkboxes would be to use %inputlist.length. This would avoid needing to count how many input elements in your html file.

Passing arrays through checkbox input values?

I am trying to get the intersection of two arrays when the user selects them but I don't know how to pass an entire array through an input value.
Here is my script:
var checkedValue = document.querySelector('.leaflet-control-layers-selector:checked').value;
result = _.intersection(checkedValue);
console.log(checkedValue);
document.getElementById("AllMuseums").value = AllMuseums;
document.getElementById("MPaid").value = MPaid;
document.getElementById("MFree").value = MFree;
document.getElementById("MResto").value = MResto;
Here are my inputs:
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="AllMuseums" checked><span>All Museums</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MPaid" value="MPaid"><span id="icons1">Paid Admission</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MFree" value="MFree"><span id="icons2">Free Admission</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MResto" value="MResto"><span id="icons3">Restaurants</span></div>
</label>
And here are my arrays:
var AllMuseums=[Naturhistoriska,Junibacken,ArkDes,Fjarilshuset,Tekniska,Polismuseet,Skansen,Bergrummet,Vikingaliv,Vasa,Nordiska,Nobel,Moderna],
MPaid=[Junibacken,Fjarilshuset,Tekniska,Polismuseet,Skansen,Bergrummet,Vikingaliv,Vasa,Nordiska,Nobel],
MFree=[Naturhistoriska,ArkDes,Moderna],
MResto=[Naturhistoriska,Junibacken,ArkDes,Fjarilshuset,Tekniska,Skansen,Bergrummet,Vikingaliv,Vasa,Nordiska,Nobel,Moderna],
So there is a solution : https://jsfiddle.net/ajxeyqo4
inputs :
first input tag add value
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="AllMuseums" value="AllMuseums" checked><span>All Museums</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MPaid" value="MPaid"><span id="icons1">Paid Admission</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MFree" value="MFree"><span id="icons2">Free Admission</span></div>
</label>
<label>
<div><input type="checkbox" class="leaflet-control-layers-selector" id="MResto" value="MResto"><span id="icons3">Restaurants</span></div>
</label>
<button onclick='test()'>
test
</button>
And your scripts :
function test(){
var AllMuseums=['Naturhistoriska','Junibacken','ArkDes','Fjarilshuset','Tekniska','Polismuseet','Skansen','Bergrummet','Vikingaliv','Vasa','Nordiska','Nobel','Moderna'],
MPaid=['Junibacken','Fjarilshuset','Tekniska','Polismuseet','Skansen','Bergrummet','Vikingaliv','Vasa','Nordiska','Nobel'],
MFree=['Naturhistoriska','ArkDes','Moderna'],
MResto=['Naturhistoriska','Junibacken','ArkDes','Fjarilshuset','Tekniska','Skansen','Bergrummet','Vikingaliv','Vasa','Nordiska','Nobel','Moderna'];
var checkedValue = document.querySelectorAll('.leaflet-control-layers-selector:checked');
var a =[]
_.map(checkedValue, function(value) {
a.push(eval(value.value));
});
var result = _.intersection(...a);
console.log(JSON.stringify(result))
}

Javascript error in getting values from checkboxes

I'm not able to get the value from my checkboxes when each of them is selected alone (i.e. in isolation), except for the last one which works fine.
Could anyone help me figure this out and correct my code?
function showChoices() {
var values = [];
var cbs = document.catalog.colors;
for (var i = 0, cbLen = cbs.length; i < cbLen; i++) {
if (cbs[i].checked) {
values.push(cbs[i].value);
document.getElementById('display').innerHTML = "You selected: " + values.join(', ') + ".";
} else {
document.getElementById('display').innerHTML = "Please select an option.";
}
}
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>
Working Solution
You can write js like this and hope this helps:
function showChoices() {
var values = [];
var cbs = document.catalog.colors;
var cbLen = cbs.length;
for (var i = 0; i < cbLen; i++) {
if (cbs[i].checked) {
values.push(cbs[i].value);
}
}
if (values.length != 0) {
document.getElementById('display').innerHTML = "You selected: " + values.join(', ') + ".";
} else {
document.getElementById('display').innerHTML = "Please select an option.";
}
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>
You are overriding the div#display's innerHTML with the "Please select an option..." text whenever the last iteration of your loop jumps into the else block (meaning the last box isn't checked).
I would check if at least one element is selected, and if not return early from your function. After that, you can simply display the values by joining them together.
function showChoices() {
var values = [];
var cbs = Array.from(document.catalog.colors);
let el = document.getElementById('display');
let checked = cbs.filter(e => e.checked);
if (!checked.length) {
el.innerHTML = 'Please select at least one';
return false;
}
el.innerHTML = `You selected ${checked.map(e => e.value).join(', ')}`;
return false;
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>

How Do I count the selected checkbox in AngularJS?

/**
* #Summary: checkAllConnectedUser function, to create album
* #param: index, productObj
* #return: callback(response)
* #Description:
*/
$scope.shardBuyerKeyIdArray = [];
$scope.countBuyer = 0;
$scope.checkAllSharedBuyer = function(isChecked) {
if (isChecked) {
if ($scope.selectAll) {
$scope.selectAll = false;
} else {
$scope.selectAll = true;
}
angular.forEach($scope.selectedSharedBuyerObjectList, function(selectedBuyer) {
selectedBuyer.select = $scope.selectAll;
//IF ID WILL BE EXIST IN THE ARRAY NOT PSUH THE KEYID
if ($scope.shardBuyerKeyIdArray.indexOf(selectedBuyer.userTypeDto.keyId) == -1) {
$scope.shardBuyerKeyIdArray.push(selectedBuyer.userTypeDto.keyId);
$scope.countBuyer++;
}
});
} else {
$scope.selectAll = false;
//USED FOR UNCHECK ALL THE DATA ONE- BY-ONE
angular.forEach($scope.selectedSharedBuyerObjectList, function(selectedBuyer) {
selectedBuyer.select = $scope.selectAll;
var index = $scope.shardBuyerKeyIdArray.indexOf(selectedBuyer.userTypeDto.keyId);
$scope.shardBuyerKeyIdArray.splice(index, 1);
$scope.countBuyer--;
});
}
}
<div class="checkbox w3-margin" ng-if="selectedSharedBuyerObjectList.length > 0">
<span class="w3-right" ng-if="countBuyer">
<h5>You are selecting {{countBuyer}} buyers!</h5>
</span>
<label>
<input type="checkbox" ng-model="selectAll" ng-click="checkAllSharedBuyer(selectAll)"/>Check All
</label>
</div>
<div id="sharedRow" class="checkbox" ng-repeat="selectedBuyer in cmnBuyer = (selectedSharedBuyerObjectList | filter : userSearchInProduct
| filter : filterUser)">
<label>
<input type="checkbox" ng-model="selectedBuyer.select"
ng-change="selectedSharedBuyer($index, selectedBuyer.select, selectedBuyer.userTypeDto.keyId)"/>
{{selectedBuyer.personName}}
</label>
</div>
I have two list in which i have to count the select all checkbox length as well as single checkbox count my problem if the user un-check the ALL checkbox Checkbox count will be return -- what's the problem in my code?
$(function(){
var count = 0;
$('#sharedRow ').find('input[type=checkbox]').on('change',function(){
$('#msg').text('You are selecting '+$('#sharedRow ').find('input[type=checkbox]:checked').length+' buyers!')
})
$('#chkAll').on('change', function () {
if ($(this).is(':checked')) {
$('#sharedRow ').find('input[type=checkbox]').prop('checked', true);
$('#msg').text('You are selecting '+$('#sharedRow ').find('input[type=checkbox]:checked').length+' buyers!')
}
else {
$('#sharedRow ').find('input[type=checkbox]').prop('checked', false);
$('#msg').text('You are selecting '+$('#sharedRow ').find('input[type=checkbox]:checked').length+' buyers!')
}
});
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="checkbox w3-margin">
<span class="w3-right">
<h5 id="msg" >You are selecting 0 buyers!</h5>
</span>
<label>
<input id="chkAll" type="checkbox" />Check All
</label>
</div>
<div id="sharedRow" class="checkbox">
<label>
<input type="checkbox" value="1 Buyers" />1 Buyers
</label>
<label>
<input type="checkbox" value="2 Buyers" />2 Buyers
</label>
<label>
<input type="checkbox" value="3 Buyers" />3 Buyers
</label>
<label>
<input type="checkbox" value="4 Buyers" />4 Buyers
</label>
<label>
<input type="checkbox" value="5 Buyers" />5 Buyers
</label>
<label>
<input type="checkbox" value="6 Buyers" />6 Buyers
</label>
<label>
<input type="checkbox" value="7 Buyers" />7 Buyers
</label>
<label>
<input type="checkbox" value="8 Buyers" />8 Buyers
</label>
</div>
try this one. is it ok? if not then tell me what's wrong.
if you have a group of checkbox then you can find all selected checkbox.
$('div').find('input[type=checkbox]:checked').length;
If you only need the number
var count = $scope.selectedSharedBuyerObjectList.reduce(function(sum, item) {
return (item.select) ? sum + 1 : sum;
}, 0);
If you need the filtered array
var selected = $scope.selectedSharedBuyerObjectList.filter(function(item) {
return item.select;
});
var count = selected.length;
Or do it using plain old loop
var count = 0;
for (i = 0; i < $scope.selectedSharedBuyerObjectList.length; i++) {
if ($scope.selectedSharedBuyerObjectList.select) count++;
}

How can I produce an alert if three out of nine checkboxes are checked?

I have nine checkboxes linked to nine images and three of them use the name 'correct' using the code shown below.
<div class="nine">
<label for="correct1"><img class="picture1" src="picture1.jpg"/></label>
<input type="checkbox" class="chk" id="correct1" name="correct"/>
</div>
The remaining six are unnamed using the code shown below.
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" class="chk" id="incorrect4"/>
</div>
I currently have the following code to produce an alert if the three checkboxes with the name "correct" are checked but it isn't working.
<script>
var i, correct = document.getElementsByName('correct');
for (i = 0; i <= correct.length; i++) {
if (correct[i].checked) {
alert('correct');
return true;
}
}
alert('incorrect');
return false;
</script>
Can anyone help me with this?
Loop over all of the checkboxes, checking their state. Once this is done, create a variable "correct" and initialize it to true. Then go to each state in the variable and, if you find that its name isn't "correct" and it is checked or its name is "correct" and it isn't correct, set the variable to false. Then check if the variable is true and, if it is, display the alert.
View an example here: https://repl.it/GxsE/9
Using ES6:
const correctInputs = [...document.querySelectorAll('input[name="correct"]')];
const alertIfThree = () => {
const checkedCorrectInputs = correctInputs.filter(input => input.checked);
if (checkedCorrectInputs.length > 2) {
alert('Alert');
}
};
correctInputs.forEach(input => input.addEventListener('click', alertIfThree));
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
document.querySelectorAll('input[name="correct"]') gets all inputs with name "correct".
[...CODE] is spread operator, it converts code from previous point to array.
correctInputs.forEach(input => input.addEventListener('click', alertIfThree)) adds click event listener to each of them. That event listener is function alertIfThree().
alertIfThree() filters out those input elements that are not checked and produces alert if there are more than 2 of them.
EDIT
In response to your comment:
// jshint esnext: true
const inputs = [...document.querySelectorAll('input[name="correct"], input[name="incorrect"]')];
const alertIfCorrect = () => {
const checkedInputs = inputs.filter(input => input.checked),
noIncorrectCheckedInputs = checkedInputs.find(input => input.name === 'incorrect') === undefined;
if (checkedInputs.length > 2 && noIncorrectCheckedInputs) {
alert('Alert');
}
};
inputs.forEach(input => input.addEventListener('click', alertIfCorrect));
<p>Correct:
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
<input type="checkbox" name="correct"/>
</p>
<p>Incorrect:
<input type="checkbox" name="incorrect"/>
<input type="checkbox" name="incorrect"/>
<input type="checkbox" name="incorrect"/>
</p>
const is ES6 constant. "The value of a constant cannot change through re-assignment, and it can't be redeclared".
[...CODE_HERE] is so called spread syntax. Here, it turns what it contains after ellipsis into an array. Other way to do it would be to use Array.from().
() => { and input => CODE_HERE are arrow functions. They are ES6's syntactic sugar for function declaration.
What stands before => are parameters. () stands for 0 parameters. If you wanted function that takes few parameters, those braces would need to have those few parameters inside them. For one parameter, parameter's name can replace braces altogether (like in second code in this bullet point).
What stands after => is either expression or group of statements. Statements are surrounded by curly brackets ({}). If you omit them, you are writing an expression that your function will return. For example input => input.checked is equivalent to function(input) { return input.checked; }.
filter() and find() are methods of array prototype. They respectively filter and search an array using condition defined in a function that is passed to them as a parameter. Read more by following those two links.
If you need something else explained, let me know. Those functions and structures here are pretty... fresh, so you can just not know them yet.
I put this in a JSfiddle and it works for me. I just wrapped your JS in a function and added an onclick event.
<div class="nine">
<label for="correct1"><img class="picture1" src="picture1.jpg"/></label>
<input type="checkbox" class="chk" id="correct1" name="correct"onclick="validate()"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" class="chk" id="incorrect4" onclick="validate()"/>
</div>
<script type=text/javascript">
function validate()
{
var i, correct = document.getElementsByName('correct');
for (i = 0; i <= correct.length; i++) {
if (correct[i].checked) {
alert('correct');
return true;
}
}
alert('incorrect');
return false;
}
</script>
It will require some javascript. You will need o check the checkboxes each time one changes. So to start with you will need to check your checkboxes, assuming they have an assigned class of 'chk'. This can be done with a querySelector.
Each time a checkbox changes, the function 'check_checkboxes()' is called. This function will see for each checkbox with name='correct' if it is checked and then increment 'count'
var checkboxes = document.querySelectorAll(".chk");
var correct = document.querySelectorAll("[name=correct]");
function check_checkbox() {
var count = 0;
[].forEach.call(correct, function(item) {
if (item.checked) {
count++;
}
});
if (count >= 3) {
alert("count of 3 or more");
}
}
[].forEach.call(checkboxes, function(item) {
item.addEventListener("change", function() {
check_checkbox();
}, false);
});
<div class="nine">
<label for="correct1"><img class="picture1" src="http://placehold.it/40x40"/></label>
<input type="checkbox" class="chk" id="correct1" name="correct" />
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="http://placehold.it/40x40"/></label>
<input type="checkbox" class="chk" id="incorrect4" />
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="http://placehold.it/40x40"/></label>
<input type="checkbox" class="chk" id="incorrect4" name="correct" />
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="http://placehold.it/40x40"/></label>
<input type="checkbox" class="chk" id="incorrect4" />
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="http://placehold.it/40x40"/></label>
<input type="checkbox" class="chk" id="incorrect4" name="correct" />
</div>
Check the loop. Use for (i = 0; i < correct.length; i++) { instead for (i = 0; i <= correct.length; i++) {
var i, correct = document.getElementsByName('correct');
var correct_answers = [];
function validate(){
correct_answers = [];
for (i = 0; i < correct.length; i++) {
var element = correct[i].getAttribute("id");
var checked = correct[i].checked;
correct_answers.push({element,checked});
}
}
function show(){
document.getElementById('results').innerHTML ="";
for(var e=0;e<correct_answers.length;e++){
var box = document.createElement('div');
box.innerHTML = correct_answers[e].element+ " " + correct_answers[e].checked+ "<br>";
document.getElementById('results').appendChild(box);
}
}
<div class="nine">
<label for="correct1"><img class="picture1" src="picture1.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="correct1" name="correct"/>
</div>
<div class="nine">
<label for="correct2"><img class="picture1" src="picture1.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="correct2" name="correct"/>
</div>
<div class="nine">
<label for="correct3"><img class="picture1" src="picture1.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="correct3" name="correct"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="incorrect4"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="incorrect5"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="incorrect6"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="incorrect7"/>
</div>
<div class="nine">
<label for="incorrect1"><img class="picture4" src="picture4.jpg"/></label>
<input type="checkbox" onclick="validate()" class="chk" id="incorrect8"/>
</div>
<button onclick="show();">show results</button>
<div id="results"></div>
Use document.querySelectorAll('input[name]=correct') in your code.

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