Develop Reference

check all boxes checked when click on parent checkbox only with Javascript? [duplicate]

I have an HTML page with multiple checkboxes.
I need one more checkbox by the name "select all". When I select this checkbox all checkboxes in the HTML page must be selected. How can I do this?

<script language="JavaScript">
function toggle(source) {
checkboxes = document.getElementsByName('foo');
for(var checkbox in checkboxes)
checkbox.checked = source.checked;
}
</script>
<input type="checkbox" onClick="toggle(this)" /> Toggle All<br/>
<input type="checkbox" name="foo" value="bar1"> Bar 1<br/>
<input type="checkbox" name="foo" value="bar2"> Bar 2<br/>
<input type="checkbox" name="foo" value="bar3"> Bar 3<br/>
<input type="checkbox" name="foo" value="bar4"> Bar 4<br/>
UPDATE:
The for each...in construct doesn't seem to work, at least in this case, in Safari 5 or Chrome 5. This code should work in all browsers:
function toggle(source) {
checkboxes = document.getElementsByName('foo');
for(var i=0, n=checkboxes.length;i<n;i++) {
checkboxes[i].checked = source.checked;
}
}

Using jQuery:
// Listen for click on toggle checkbox
$('#select-all').click(function(event) {
if(this.checked) {
// Iterate each checkbox
$(':checkbox').each(function() {
this.checked = true;
});
} else {
$(':checkbox').each(function() {
this.checked = false;
});
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="checkbox" name="checkbox-1" id="checkbox-1" />
<input type="checkbox" name="checkbox-2" id="checkbox-2" />
<input type="checkbox" name="checkbox-3" id="checkbox-3" />
<!-- select all boxes -->
<input type="checkbox" name="select-all" id="select-all" />

I'm not sure anyone hasn't answered in this way (using jQuery):
$( '#container .toggle-button' ).click( function () {
$( '#container input[type="checkbox"]' ).prop('checked', this.checked)
})
It's clean, has no loops or if/else clauses and works as a charm.

I'm surprised no one mentioned document.querySelectorAll(). Pure JavaScript solution, works in IE9+.
function toggle(source) {
var checkboxes = document.querySelectorAll('input[type="checkbox"]');
for (var i = 0; i < checkboxes.length; i++) {
if (checkboxes[i] != source)
checkboxes[i].checked = source.checked;
}
}
<input type="checkbox" onclick="toggle(this);" />Check all?<br />
<input type="checkbox" />Bar 1<br />
<input type="checkbox" />Bar 2<br />
<input type="checkbox" />Bar 3<br />
<input type="checkbox" />Bar 4<br />

here's a different way less code
$(function () {
$('#select-all').click(function (event) {
var selected = this.checked;
// Iterate each checkbox
$(':checkbox').each(function () { this.checked = selected; });
});
});

Demo http://jsfiddle.net/H37cb/
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js" /></script>
<script type="text/javascript">
$(document).ready(function(){
$('input[name="all"],input[name="title"]').bind('click', function(){
var status = $(this).is(':checked');
$('input[type="checkbox"]', $(this).parent('li')).attr('checked', status);
});
});
</script>
<div id="wrapper">
<li style="margin-top: 20px">
<input type="checkbox" name="all" id="all" /> <label for='all'>All</label>
<ul>
<li><input type="checkbox" name="title" id="title_1" /> <label for="title_1"><strong>Title 01</strong></label>
<ul>
<li><input type="checkbox" name="selected[]" id="box_1" value="1" /> <label for="box_1">Sub Title 01</label></li>
<li><input type="checkbox" name="selected[]" id="box_2" value="2" /> <label for="box_2">Sub Title 02</label></li>
<li><input type="checkbox" name="selected[]" id="box_3" value="3" /> <label for="box_3">Sub Title 03</label></li>
<li><input type="checkbox" name="selected[]" id="box_4" value="4" /> <label for="box_4">Sub Title 04</label></li>
</ul>
</li>
</ul>
<ul>
<li><input type="checkbox" name="title" id="title_2" /> <label for="title_2"><strong>Title 02</strong></label>
<ul>
<li><input type="checkbox" name="selected[]" id="box_5" value="5" /> <label for="box_5">Sub Title 05</label></li>
<li><input type="checkbox" name="selected[]" id="box_6" value="6" /> <label for="box_6">Sub Title 06</label></li>
<li><input type="checkbox" name="selected[]" id="box_7" value="7" /> <label for="box_7">Sub Title 07</label></li>
</ul>
</li>
</ul>
</li>
</div>

When you call document.getElementsByName("name"), you will get a Object. Use .item(index) to traverse all items of a Object
HTML:
<input type="checkbox" onclick="for(c in document.getElementsByName('rfile')) document.getElementsByName('rfile').item(c).checked = this.checked">
<input type=​"checkbox" name=​"rfile" value=​"/​cgi-bin/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​includes/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​misc/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​modules/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​profiles/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​scripts/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​sites/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​stats/​">​
<input type=​"checkbox" name=​"rfile" value=​"/​themes/​">​

Slightly changed version which checks and unchecks respectfully
$('#select-all').click(function(event) {
var $that = $(this);
$(':checkbox').each(function() {
this.checked = $that.is(':checked');
});
});

My simple solution allows to selectively select/deselect all checkboxes in a given portion of the form, while using different names for each checkbox, so that they can be easily recognized after the form is POSTed.
Javascript:
function setAllCheckboxes(divId, sourceCheckbox) {
divElement = document.getElementById(divId);
inputElements = divElement.getElementsByTagName('input');
for (i = 0; i < inputElements.length; i++) {
if (inputElements[i].type != 'checkbox')
continue;
inputElements[i].checked = sourceCheckbox.checked;
}
}
HTML example:
<p><input onClick="setAllCheckboxes('actors', this);" type="checkbox" />All of them</p>
<div id="actors">
<p><input type="checkbox" name="kevin" />Spacey, Kevin</p>
<p><input type="checkbox" name="colin" />Firth, Colin</p>
<p><input type="checkbox" name="scarlett" />Johansson, Scarlett</p>
</div>
I hope you like it!

<html>
<head>
<script type="text/javascript">
function do_this(){
var checkboxes = document.getElementsByName('approve[]');
var button = document.getElementById('toggle');
if(button.value == 'select'){
for (var i in checkboxes){
checkboxes[i].checked = 'FALSE';
}
button.value = 'deselect'
}else{
for (var i in checkboxes){
checkboxes[i].checked = '';
}
button.value = 'select';
}
}
</script>
</head>
<body>
<input type="checkbox" name="approve[]" value="1" />
<input type="checkbox" name="approve[]" value="2" />
<input type="checkbox" name="approve[]" value="3" />
<input type="button" id="toggle" value="select" onClick="do_this()" />
</body>
</html>

Try this simple JQuery:
$('#select-all').click(function(event) {
if (this.checked) {
$(':checkbox').prop('checked', true);
} else {
$(':checkbox').prop('checked', false);
}
});

JavaScript is your best bet. The link below gives an example using buttons to de/select all. You could try to adapt it to use a check box, just use you 'select all' check box' onClick attribute.
Javascript Function to Check or Uncheck all Checkboxes
This page has a simpler example
http://www.htmlcodetutorial.com/forms/_INPUT_onClick.html

This sample works with native JavaScript where the checkbox variable name varies, i.e. not all "foo."
<!DOCTYPE html>
<html>
<body>
<p>Toggling checkboxes</p>
<script>
function getcheckboxes() {
var node_list = document.getElementsByTagName('input');
var checkboxes = [];
for (var i = 0; i < node_list.length; i++)
{
var node = node_list[i];
if (node.getAttribute('type') == 'checkbox')
{
checkboxes.push(node);
}
}
return checkboxes;
}
function toggle(source) {
checkboxes = getcheckboxes();
for (var i = 0 n = checkboxes.length; i < n; i++)
{
checkboxes[i].checked = source.checked;
}
}
</script>
<input type="checkbox" name="foo1" value="bar1"> Bar 1<br/>
<input type="checkbox" name="foo2" value="bar2"> Bar 2<br/>
<input type="checkbox" name="foo3" value="bar3"> Bar 3<br/>
<input type="checkbox" name="foo4" value="bar4"> Bar 4<br/>
<input type="checkbox" onClick="toggle(this)" /> Toggle All<br/>
</body>
</html>

It's rather simple:
const selectAllCheckboxes = () => {
const checkboxes = document.querySelectorAll('input[type=checkbox]');
checkboxes.forEach((cb) => { cb.checked = true; });
}

If adopting the top answer for jQuery, remember that the object passed to the click function is an EventHandler, not the original checkbox object. Therefore code should be modified as follows.
HTML
<input type="checkbox" name="selectThemAll"/> Toggle All<br/>
<input type="checkbox" name="foo" value="bar1"> Bar 1<br/>
<input type="checkbox" name="foo" value="bar2"> Bar 2<br/>
<input type="checkbox" name="foo" value="bar3"> Bar 3<br/>
<input type="checkbox" name="foo" value="bar4"> Bar 4<br/>
Javascript
$(function() {
jQuery("[name=selectThemAll]").click(function(source) {
checkboxes = jQuery("[name=foo]");
for(var i in checkboxes){
checkboxes[i].checked = source.target.checked;
}
});
})

<asp:CheckBox ID="CheckBox1" runat="server" Text="Select All" onclick="checkAll(this);" />
<br />
<asp:CheckBoxList ID="CheckBoxList1" runat="server">
<asp:ListItem Value="Item 1">Item 1</asp:ListItem>
<asp:ListItem Value="Item 2">Item 2</asp:ListItem>
<asp:ListItem Value="Item 3">Item 3</asp:ListItem>
<asp:ListItem Value="Item 4">Item 4</asp:ListItem>
<asp:ListItem Value="Item 5">Item 5</asp:ListItem>
<asp:ListItem Value="Item 6">Item 6</asp:ListItem>
</asp:CheckBoxList>
<script type="text/javascript">
function checkAll(obj1) {
var checkboxCollection = document.getElementById('<%=CheckBoxList1.ClientID %>').getElementsByTagName('input');
for (var i = 0; i < checkboxCollection.length; i++) {
if (checkboxCollection[i].type.toString().toLowerCase() == "checkbox") {
checkboxCollection[i].checked = obj1.checked;
}
}
}
</script>

that should do the job done:
$(':checkbox').each(function() {
this.checked = true;
});

You may have different sets of checkboxes on the same form. Here is a solution that selects/unselects checkboxes by class name, using vanilla javascript function document.getElementsByClassName
The Select All button
<input type='checkbox' id='select_all_invoices' onclick="selectAll()"> Select All
Some of the checkboxes to select
<input type='checkbox' class='check_invoice' id='check_123' name='check_123' value='321' />
<input type='checkbox' class='check_invoice' id='check_456' name='check_456' value='852' />
The javascript
function selectAll() {
var blnChecked = document.getElementById("select_all_invoices").checked;
var check_invoices = document.getElementsByClassName("check_invoice");
var intLength = check_invoices.length;
for(var i = 0; i < intLength; i++) {
var check_invoice = check_invoices[i];
check_invoice.checked = blnChecked;
}
}

This is what this will do, for instance if you have 5 checkboxes, and you click check all,it check all, now if you uncheck all the checkbox probably by clicking each 5 checkboxs, by the time you uncheck the last checkbox, the select all checkbox also gets unchecked
$("#select-all").change(function(){
$(".allcheckbox").prop("checked", $(this).prop("checked"))
})
$(".allcheckbox").change(function(){
if($(this).prop("checked") == false){
$("#select-all").prop("checked", false)
}
if($(".allcheckbox:checked").length == $(".allcheckbox").length){
$("#select-all").prop("checked", true)
}
})

As I cannot comment, here as answer:
I would write Can Berk Güder's solution in a more general way,
so you may reuse the function for other checkboxes
<script language="JavaScript">
function toggleCheckboxes(source, cbName) {
checkboxes = document.getElementsByName(cbName);
for (var i = 0, n = checkboxes.length; i < n; i++) {
checkboxes[i].checked = source.checked;
}
}
</script>
<input type="checkbox" onClick="toggleCheckboxes(this,\'foo\')" /> Toggle All<br/>
<input type="checkbox" name="foo" value="bar1"> Bar 1<br/>
<input type="checkbox" name="foo" value="bar2"> Bar 2<br/>
<input type="checkbox" name="foo" value="bar3"> Bar 3<br/>
<input type="checkbox" name="foo" value="bar4"> Bar 4<br/>
<input type="checkbox" name="foo" value="bar5"> Bar 5<br/>

$(document).ready(function() {
$(document).on(' change', 'input[name="check_all"]', function() {
$('.cb').prop("checked", this.checked);
});
});

Using jQuery and knockout:
With this binding main checkbox stays in sync with underliying checkboxes, it will be unchecked unless all checkboxes checked.
ko.bindingHandlers.allChecked = {
init: function (element, valueAccessor) {
var selector = valueAccessor();
function getChecked () {
element.checked = $(selector).toArray().every(function (checkbox) {
return checkbox.checked;
});
}
function setChecked (value) {
$(selector).toArray().forEach(function (checkbox) {
if (checkbox.checked !== value) {
checkbox.click();
}
});
}
ko.utils.registerEventHandler(element, 'click', function (event) {
setChecked(event.target.checked);
});
$(window.document).on('change', selector, getChecked);
ko.utils.domNodeDisposal.addDisposeCallback(element, () => {
$(window.document).off('change', selector, getChecked);
});
getChecked();
}
};
in html:
<input id="check-all-values" type="checkbox" data-bind="allChecked: '.checkValue'"/>
<input id="check-1" type="checkbox" class="checkValue"/>
<input id="check-2" type="checkbox" class="checkValue"/>

to make it in short-hand version by using jQuery
The select all checkbox
<input type="checkbox" id="chkSelectAll">
The children checkbox
<input type="checkbox" class="chkDel">
<input type="checkbox" class="chkDel">
<input type="checkbox" class="chkDel">
jQuery
$("#chkSelectAll").on('click', function(){
this.checked ? $(".chkDel").prop("checked",true) : $(".chkDel").prop("checked",false);
})

Below methods are very Easy to understand and you can implement existing forms in minutes
With Jquery,
$(document).ready(function() {
$('#check-all').click(function(){
$("input:checkbox").attr('checked', true);
});
$('#uncheck-all').click(function(){
$("input:checkbox").attr('checked', false);
});
});
in HTML form put below buttons
<a id="check-all" href="javascript:void(0);">check all</a>
<a id="uncheck-all" href="javascript:void(0);">uncheck all</a>
With just using javascript,
<script type="text/javascript">
function checkAll(formname, checktoggle)
{
var checkboxes = new Array();
checkboxes = document[formname].getElementsByTagName('input');
for (var i=0; i<checkboxes.length; i++) {
if (checkboxes[i].type == 'checkbox') {
checkboxes[i].checked = checktoggle;
}
}
}
</script>
in HTML form put below buttons
<button onclick="javascript:checkAll('form3', true);" href="javascript:void();">check all</button>
<button onclick="javascript:checkAll('form3', false);" href="javascript:void();">uncheck all</button>

Here is a backbone.js implementation:
events: {
"click #toggleChecked" : "toggleChecked"
},
toggleChecked: function(event) {
var checkboxes = document.getElementsByName('options');
for(var i=0; i<checkboxes.length; i++) {
checkboxes[i].checked = event.currentTarget.checked;
}
},

html
<input class='all' type='checkbox'> All
<input class='item' type='checkbox' value='1'> 1
<input class='item' type='checkbox' value='2'> 2
<input class='item' type='checkbox' value='3'> 3
javascript
$(':checkbox.all').change(function(){
$(':checkbox.item').prop('checked', this.checked);
});

1: Add the onchange event Handler
<th><INPUT type="checkbox" onchange="checkAll(this)" name="chk[]" /> </th>
2: Modify the code to handle checked/unchecked
function checkAll(ele) {
var checkboxes = document.getElementsByTagName('input');
if (ele.checked) {
for (var i = 0; i < checkboxes.length; i++) {
if (checkboxes[i].type == 'checkbox') {
checkboxes[i].checked = true;
}
}
} else {
for (var i = 0; i < checkboxes.length; i++) {
console.log(i)
if (checkboxes[i].type == 'checkbox') {
checkboxes[i].checked = false;
}
}
}
}

You can Use This code.
var checkbox = document.getElementById("dlCheckAll4Delete");
checkbox.addEventListener("click", function (event) {
let checkboxes = document.querySelectorAll(".dlMultiDelete");
checkboxes.forEach(function (ele) {
ele.checked = !!checkbox.checked;
});
});

You can use this simple code
$('.checkall').click(function(){
var checked = $(this).prop('checked');
$('.checkme').prop('checked', checked);
});

Maybe a bit late, but when dealing with a check all checkbox, I believe you should also handle the scenario for when you have the check all checkbox checked, and then unchecking one of the checkboxes below.
In that case it should automatically uncheck the check all checkbox.
Also when manually checking all the checkboxes, you should end up with the check all checkbox being automatically checked.
You need two event handlers, one for the check all box, and one for when clicking any of the single boxes below.
// HANDLES THE INDIVIDUAL CHECKBOX CLICKS
function client_onclick() {
var selectAllChecked = $("#chk-clients-all").prop("checked");
// IF CHECK ALL IS CHECKED, AND YOU'RE UNCHECKING AN INDIVIDUAL BOX, JUST UNCHECK THE CHECK ALL CHECKBOX.
if (selectAllChecked && $(this).prop("checked") == false) {
$("#chk-clients-all").prop("checked", false);
} else { // OTHERWISE WE NEED TO LOOP THROUGH INDIVIDUAL CHECKBOXES AND SEE IF THEY ARE ALL CHECKED, THEN CHECK THE SELECT ALL CHECKBOX ACCORDINGLY.
var allChecked = true;
$(".client").each(function () {
allChecked = $(this).prop("checked");
if (!allChecked) {
return false;
}
});
$("#chk-clients-all").prop("checked", allChecked);
}
}
// HANDLES THE TOP CHECK ALL CHECKBOX
function client_all_onclick() {
$(".client").prop("checked", $(this).prop("checked"));
}

Alert when selected similar value from multiple check box with the same class name

When I select for a second time from the below check box with the same value it should alert 'value is already checked' How do I do that using jquery?
<div>
<input type="checkbox" class="check" value="1"/>
</div>
<div>
<input type="checkbox" class="check" value="2"/>
</div>
<div>
<input type="checkbox" class="check" value="1"/>
</div>
<div>
<input type="checkbox" class="check" value="3"/>
</div>
<div>
<input type="checkbox" class="check" value="4"/>
</div>
<div>
<input type="checkbox" class="check" value="3"/>
</div>
I tried with below code but nothing is working
var itemVal=false;
$(document).on('change','.check:checked',function(){
selVal=$(this).val();
$('.check:checked').each(function(){
if($(this).val()==selVal)
itemVal=true;
});
if(itemVal==true){
alert('Proceed');
}else{
alert('Please choose same name');
}
});

Try this:
$('.check').change(function(event){
var arr = $(".check:checked").map(function() {
return $(this).val();
}).get();
var sorted_arr = arr.sort();
var results = [];
for (var i = 0; i < arr.length - 1; i++) {
if (sorted_arr[i + 1] == sorted_arr[i]) {
results.push(sorted_arr[i]);
}
}
if(results.length >0){
alert('value is already checked')
}
});
Demo:
http://jsfiddle.net/9a8o37h0/1/

Like this:
$('.check').click(function () {
if(!this.checked)
alert("Value is already Checked");
});
If you want to keep it checked add this before the alert
this.checked = true;

Pass jQuery array value on submit as hidden input

On button press the following code will display a message with values collected from all checkboxes. But I want to pass these values (returned by function) as hidden input on submit.
<form action="script.php" method="post">
<input type="checkbox" name="chb1" value="html" />HTML<br/>
<input type="checkbox" name="chb2" value="css" />CSS<br/>
<input type="checkbox" name="chb3" value="javascript" />JavaScript<br/>
<input type="checkbox" name="chb4" value="php" />php<br/>
<input type="checkbox" name="chb5" value="python" />Python<br/>
<input type="checkbox" name="chb6" value="net" />Net<br/>
<input type="button" value="Click" id="btntest" />
</form>
<script type="text/javascript"><!--
function getSelectedChbox(frm) {
var selchbox = [];
var inpfields = frm.getElementsByTagName('input');
var nr_inpfields = inpfields.length;
for(var i=0; i<nr_inpfields; i++) {
if(inpfields[i].type == 'checkbox' && inpfields[i].checked == true) selchbox.push(inpfields[i].value);
}
return selchbox;
}
document.getElementById('btntest').onclick = function(){
var selchb = getSelectedChbox(this.form);
alert(selchb);
}
//-->
</script>

I've seen guys like you trying to code my router interface, so I'll help out.
give your form an id cause you'll need it later
<form action="script.php" method="post" id="the_form">
add the hidden input in the form
<input type="hidden" name="values" id="values" value="" />
the button in the form matures to a real submit (amazing)
<input type="submit" ...
your "getSelectedChbox()" function is amazing; don't change anything there, just wanted to give you congratulations for it, it's a great function
now, where it says document.getElementById('btntest').onclick - get rid of all that and add this code instead; this code will do the rest.
document.getElementById('the_form').onsubmit = function(){
var selchb = getSelectedChbox(this);
var values = selchb.join(', ');
if(!values.length){
alert('There was an error. You have to select some checkboxes. ');
return false;
}
document.getElementById('values').value = values;
if(!confirm(" Are you interested in submitting this form now? If not, click accordingly. "))
return false;
}
Or simply copy-paste this whole thing in a file called script.php:
<?php echo var_dump(isset($_POST['values']) ? $_POST['values'] : 'Submit first.'); ?>
<form action="script.php" method="post" id="the_form">
<input type="checkbox" name="chb1" value="html" />HTML<br/>
<input type="checkbox" name="chb2" value="css" />CSS<br/>
<input type="checkbox" name="chb3" value="javascript" />JavaScript<br/>
<input type="checkbox" name="chb4" value="php" />php<br/>
<input type="checkbox" name="chb5" value="python" />Python<br/>
<input type="checkbox" name="chb6" value="net" />Net<br/>
<input type="hidden" name="values" id="values" value="" />
<input type="submit" value="Click" id="btntest" />
</form>
<script type="text/javascript"><!--
function getSelectedChbox(frm) {
var selchbox = [];
var inpfields = frm.getElementsByTagName('input');
var nr_inpfields = inpfields.length;
for(var i=0; i<nr_inpfields; i++) {
if(inpfields[i].type == 'checkbox' && inpfields[i].checked == true)
selchbox.push(inpfields[i].value);
}
return selchbox;
}
document.getElementById('the_form').onsubmit = function(){
var selchb = getSelectedChbox(this);
var values = selchb.join(', ');
if(!values.length){
alert('There was an error. You have to select some checkboxes. ');
return false;
}
document.getElementById('values').value = values;
if(!confirm(" Are you interested in submitting this form now? If not, click accordingly. "))
return false;
}
//-->
</script>
Have fun.

Collect multiple checkbox values without form tag using javascript

I am working on a plugin for MyBB, and there I have to collect values of all checked "checkboxes" every checkbox has diffrent name/ID & unfortunatly these checkboxes are not placed under any form tag so how can I do this ???
Look at code below this code works fine if I place form tag at first row but it doesn't return anything if I place form tag below all checkbox (actually this is exactly how I have to handle checkboxes in MyBB)
Thanks,
<input type="checkbox" name="chb1" value="html" />HTML<br/>
<input type="checkbox" name="chb2" value="css" />CSS<br/>
<input type="checkbox" name="chb3" value="javascript" />JavaScript<br/>
<input type="checkbox" name="chb4" value="php" />php<br/>
<input type="checkbox" name="chb5" value="python" />Python<br/>
<input type="checkbox" name="chb6" value="net" />Net<br/>
<form action="script.php" method="post">
<input type="button" value="Click" id="btntest" />
</form>
<script type="text/javascript"><!--
function getSelectedChbox(frm) {
var selchbox = [];
var inpfields = frm.getElementsByTagName('input');
var nr_inpfields = inpfields.length;
for(var i=0; i<nr_inpfields; i++) {
if(inpfields[i].type == 'checkbox' && inpfields[i].checked == true) selchbox.push(inpfields[i].value);
}
return selchbox;
}
document.getElementById('btntest').onclick = function(){
var selchb = getSelectedChbox(this.form);
alert(selchb);
}
//-->
</script>

>>>Test the Fiddle<<<
Well... with pure JavaScript:
function getCheckboxesValues(){
return [].slice.apply(document.querySelectorAll("input[type=checkbox]"))
.filter(function(c){ return c.checked; })
.map(function(c){ return c.value; });
}
document.getElementById("btntest").addEventListener("click", function(){
console.log(getCheckboxesValues());
});

Javascript help. Adding/removing form element to DOM

if radio button 2 is checked add input box into datesettings. How do i add an input box? If radio button 1 is checked do nothing but if button 2 was checked previously remove children. Can you help me
Thanks
function CheckDateOptions() {
var o1 = document.getElementById("dateoption1");
var o2 = document.getElementById("dateoption2");
var eSettings = document.getElementById("datesettings");
if(o1.checked) {
//Remove o2 children
}
else if(o2.checked) {
//How do I add an input box?
}
}
<input type="radio" id="dateoption1" name="dateoption" value="1" onclick="CheckDateOptions();">
<input type="radio" id="dateoption2" name="dateoption" value="2" onclick="CheckDateOptions();">
<span id="datesettings">//Add input box here if dateoption2 is checked</span>

The simplest route would be:
<input type="radio" id="dateoption1" name="dateoption" value="1" ="ToggleDateOptions(true);" />
<input type="radio" id="dateoption2" name="dateoption" value="2" ="ToggleDateOptions(false);" />
<span id="datesettings">
<input type="text" id="dateSetting" />
</span>
<script>
function ToggleDateOptions(oneChecked) {
if(oneChecked)
{
$("#dateSetting").hide();
}
else
{
$("#dateSetting").show();
}
}
</script>
Or if you didn't want to use JQuery (Which is used above) you could do:
if(oneChecked)
{
document.getElementById("dateSetting").style.display = 'none';
}
else
{
document.getElementById("dateSetting").style.display = 'inline';
}

You can just use innerHTML to add the input field.
Something like this should work for you
<script type="text/javascript">
function CheckDateOptions() {
var o1 = document.getElementById("dateoption1");
var o2 = document.getElementById("dateoption2");
var eSettings = document.getElementById("datesettings");
if(o1.checked) {
eSettings.innerHTML = "";
} else if(o2.checked) {
eSettings.innerHTML = '<input type="text" name="field" />';
}
}
</script>
<input type="radio" id="dateoption1" name="dateoption" value="1" onclick="CheckDateOptions()"/>
<input type="radio" id="dateoption2" name="dateoption" value="2" onclick="CheckDateOptions()"/>
<span id="datesettings"></span>
Demo