How to delete a check box using javascript - javascript

I'm working on this HTML Page where i can add a check-box along with the label by clicking the add button, is there anyway that i can have a delete button as well so that when i select a check-box and press the delete button the check-box along with the text box is deleted??Please find my code below!!
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script type="text/javascript">
function Add()
{
var checkbox=document.createElement('input');
var inps=document.createElement('input');
var output=document.getElementById('output');
checkbox.type='checkbox';
inps.type='text';
inps.name='textboxname';
checkbox.name='checkname';
output.appendChild(checkbox);
output.appendChild(inps);
output.appendChild(document.createElement('br'));
}
</script>
</head>
<body>
<form action="http://localhost:9990" method="post">
<span id="output"></span>
<input type="button" value="Add" onclick="Add()">
<center>
<p>
<input type="file" name="datafile" size="40">
</p>
<div>
<input type="submit" value="Send">
</div>
</center>
</form>
</body>
</html>

Give all of the check boxes that could potentially be deleted the same class. Additionally label all of the text boxes that could be deleted with their own class. My check boxes will be labeled with chk and my text boxes will be labeled with txt. As in:
<input type="checkbox" class = 'chk' /> and
<input type="text" class = 'txt' />
The following solution should work as long as check boxes and text fields are 1 to 1.
the function you will add to your delete button will loop through all of the check boxes and see if they are deleted and then delete the checked ones.
Heres the JS:
function delBoxes(){
var boxes = document.getElementsByClassName('chk');
var texts = document.getElementsByClassName('txt');
for(var i = 0; i<boxes.length; i++){
box = boxes[i];
txt = texts[i];
if(box.checked){
box.parentNode.removeChild(box);
txt.parentNode.removeChild(txt);
}
}
}
That will delete all of the checked check boxes, all you have to do now is make a button and add that function as an onclick.
<input type="button" value="Delete checked boxes" onclick = "delBoxes();" />

Sample HTML
<div>
<input type='checkbox' value='asd' id='test' name='test' />
<input type='checkbox' value='asd' id='tester' name='test' />
<input type='button' value='remove' id='rmvBtn' />
</div>
In pure javascript, you can do this,
var rmvBtn = document.getElementById('rmvBtn');
rmvBtn.addEventListener('click', function(){
var rmvCheckBoxes = document.getElementsByName('test');
for(var i = 0; i < rmvCheckBoxes.length; i++)
{
if(rmvCheckBoxes[i].checked)
{
removeElm(rmvCheckBoxes[i]);
}
}
});
function removeElm(elm){
elm.parentElement.removeChild(elm);
}
JS Fiddle

HTML
<input type="checkbox" id="checkboxid" name="checkboxname">
<button id="btnDeleteid" onclick="deleteCheckBox()" name="btnDeletename">Delete</button>
JavaScript
function deleteCheckBox(){
if (document.getElementById('checkboxid').checked){
var answer = confirm('Are you sure you want to delete this checkbox?');
if (answer)
{
$("#checkboxid").remove();
}
}else{
alert("Pls check the checkbox.");
}
}
I hope this will help.
Refer fiddle - http://jsfiddle.net/F8w8B/3/

Related

how to save the value of radio buttons when another new radio buttons are added

Here I have a button as the user click it add a question with 2 radioButton yes/no as the user choose one value it disappears if the button is clicked again and new radioButtons are added. I want a solution where the value of the checked radioButton will be visible as checked even if the button is clicked and new radioButtons are added. I have tried to make the id tag variable so that each radioButton have a unique id but it does not make any difference. Any help will be very appreciated.
<!DOCTYPE html>
<html>
<body>
<h1>Radio Buttons </h1>
<div id = "demo"> </div>
<br>
<button onclick="myFunction()"> add </button>
<script>
function myFunction() {
document.getElementById("demo").innerHTML += '<br> agree? '+
'<br> <input type="radio" id="x"> yes' + ' <input type="radio" id="y"> No <br>';
}
</script>
</body>
</html>
innerHTML will overwrite! And you'll loose previous input states.
Instead use Element.insertAdjacentHTML()
<!DOCTYPE html>
<html>
<body>
<h1>Radio Buttons </h1>
<div id = "demo"> </div>
<br>
<button onclick="myFunction()"> add </button>
<script>
function myFunction() {
document.getElementById("demo").insertAdjacentHTML("beforeend", '<br> agree? '+
'<br> <input type="radio" id="x"> yes' + ' <input type="radio" id="y"> No <br>');
}
</script>
</body>
</html>
You can include your functionality into a wrapper which will store the id you need, call myFunction and if there is a valid id stored, click it to check it.
function myFunctionWrapper() {
var checked = document.querySelector("#demo > input[type=radio]:checked")
var checkedID = checked ? checked.id : undefined;
myFunction();
if (!!checkedID) {
document.querySelector("#" + checked.id).click();
}
}
Try following;
<!DOCTYPE html>
<html>
<body>
<h1>Radio Buttons </h1>
<div id = "demo"> </div>
<br>
<button onclick="myFunction()"> add </button>
<script>
var x=0;
var y=0;
function myFunction() {
var html="";
for(var i=0;i<x;i++)
{
if(document.getElementById("radio-"+i).checked)
html=html+"<input type=radio id=radio-"+i+" name=rad-"+i+" checked> Yes <input type=radio id=radio1-"+i+" name=rad-"+i+"> No <br>";
else
html=html+"<input type=radio id=radio-"+i+" name=rad-"+i+"> Yes <input type=radio id=radio1-"+i+" name=rad-"+i+" checked> No <br>";
}
html=html+"<input type=radio id=radio-"+y+" name=rad-"+x+"> Yes <input type=radio id=radio1-"+y+" name=rad-"+x+"> No <br>";
document.getElementById("demo").innerHTML=html;
x++;
y++;
}
</script>
</body>
</html>
Tested and working.

How to solve validation using multiple buttons in a form

I have a form, with a number of textboxes which a user can fill in. At the bottom of the form I have two buttons. One for canceling and one for submitting. Like the example below
<form action='bla.php' method='post'>
<input type='text' name='someTextField1'>
<input type='text' name='someTextField2'>
<input type='text' name='someTextField3'>
<input type='submit' name='submit'>
<input type='submit' name='cancel'>
</form>
And I have a js function that checks the fields for their data which I used to use for both buttons. I therefor refer to the js function in the form as below:
<form action='bla.php' method='post' name='form' onSubmit='return CheckFields()'>
The js function looks like this:
function CheckFields() {
var formname = "form";
var x = document.forms[formname]["someTextField1"].value;
var result = true;
var text = "";
if (x == null || x == "") {
text += "Dont forget about the someTextField1.\n";
result = false;
}
if(!result)
alert(text);
return result;
}
Now I want this js function to only run when using the submit and not the cancel button. When I try to move the call to the function to the submit button as below it doesn't work:
<input type='submit' name='submit' onClick='return CheckFields()'>
<input type='submit' name='cancel'>
Why? What is the smartest way of solving this? Should I leave the call to CheckFields() in the form and check within the script what button was clicked or should I remake the function to somewhat work with a button instead? Anyone have an idea or an example?
replace <input type='submit' name='cancel'> by <input type='button' name='cancel'>.Your Version actually has two submit-buttons, both of which will submit the form.
Watch this sample http://jsfiddle.net/355vw560/
<form action='bla.php' method='post' name="form">
<input type='text' name='someTextField1'>
<input type='text' name='someTextField2'>
<input type='text' name='someTextField3'>
<br/>
<input type='submit' name='submit' onclick="return window.CheckFields()">
<input type='submit' name='cancel' value="cancel" onclick="return false;">
anyway it's always better to use jquery or event listeners instead of managing events directly in the dom.
The function didnt worked because its scope was the element, if u specify window as context your function works.
First at all, it's not needed have submit button on a form if you want to use javascript to check all the fields before submitting.
I think the smartest way of doing it will be as follow:
Your form (without action, submit button, and method. Only identifing each component with id's):
<form id="formId">
<input type='text' id="text1">
<input type='text' id="text2">
<input type='text' id="text3">
<input type='button' id="accept">
<input type='button' id="cancel">
</form>
Your javascript (you have to have jQuery added):
jQuery("#formId").on("click", "#accept", function(){ //listen the accept button click
if(CheckFields()){ //here you check the fields and if they are correct
//then get all the input values and do the ajax call sending the data
var text1 = jQuery("#text1").val();
var text2 = jQuery("#text2").val();
var text3 = jQuery("#text3").val();
jQuery.ajax({
url: "bla.php",
method: "POST",
data: {
"someTextField1":text1, //In your example "someTextField1" is the name that the bla.php file is waiting for, so if you use the same here, it's not needed to change anything in your backend.
"someTextField2":text2,
"someTextField3":text3
},
success: function(){
//here you can do whatever you want when the call is success. For example, redirect to other page, clean the form, show an alert, etc.
}
});
}
});
jQuery("#formId").on("click", "#cancel", function(){ //here listen the click on the cancel button
//here you can clean the form, etc
});
function CheckFields() { //here I did a little change for validating, using jQuery.
var x = jQuery("#text1").val();
var result = true;
var text = "";
if (x == null || x == "") {
text += "Dont forget about the someTextField1.\n";
result = false;
}
if(!result)
alert(text);
return result;
}
I hope it helps you!
I handle it with this way , Hope it will help.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<form method="post" action="/">
<div class="container" style="background: #efefef; padding: 20px;">
<label>Encrypt and decrypt text with AES algorithm</label>
<textarea name="inputText" id = "inputText" rows="3" cols="100" placeholder="Type text to Encrypt..." maxlength="16" ></textarea>
<br>
<br>
<textarea name="inputKey" id = "inputKey" rows="1" cols="100" placeholder="Type key to Encrypt\Decrypt text with..." maxlength="16"></textarea>
<br>
<br>
<label>SBox :</label>
<div>
<div class="s-box-radios">
<ul class="sbox">
<li>
<label>SBox 1
<input id="sbox1" name="sboxOption" type="radio" value="option1" required/>
</label>
</li>
<li>
<label>SBox 2
<input id="sbox2" name="sboxOption" type="radio" value="option2" />
</label>
</li>
<li>
<label>SBox 3
<input id="sbox3" name="sboxOption" type="radio" value="option3" />
</label>
</li>
<li>
<label>SBox 4
<input id="sbox4" name="sboxOption" type="radio" value="option4" />
</label>
</li>
</ul>
</div>
<div class="s-box-display">
<textarea rows="5" cols="10"></textarea>
</div>
</div>
<div class="clear"></div>
<br>
<label>Result of Decryption in plain text</label>
<textarea name="inputCipher" rows="3" cols="100" placeholder="Encrypted Texts..." name="decrpyted"></textarea>
<br>
<input type="submit" value="Encrypt" name="Encrypt" id ="encrypt" onclick="valEncrypt()" />
<input type="submit" value="Decrypt" name="Decrypt" id ="decrypt" onclick="valDncrypt()" />
</div>
</form>
<script>
function valEncrypt()
{
var inputText = document.getElementById('inputText');
var inputkey = document.getElementById('inputKey');
if (inputText.value.length <16)
{
doAlert(inputText);
return false;
}
else
{
removeAlert(inputText);
}
if (inputkey.value.length <16)
{
doAlert(inputkey);
return false;
}
else
{
removeAlert(inputkey);
}
}
function valDncrypt()
{
var inputkey = document.getElementById('inputKey');
if (inputkey.value.length <16)
{
doAlert(inputkey);
return false;
}
alert('!Success');
}
function doAlert(element){
element.style.border = "1px solid #FF0000";
}
function removeAlert(element){
element.style.border = "1px solid #000000";
}
</script>
</body>
</html>

Creating text fields according to user's input in JavaScript Function

I want to create text fields according to user's input and show the text fields through JavaScript function but this code is not working!
<html>
<head>
<title>Create text Fields according to the users choice!</title>
<script type="script/JavaScript">
function createTextField(){
var userInput = parseInt(document.form2.txtInput.view);
for(var i=0; i<=userInput;i++)
{
document.write('<input type="text">');
}
}
</script>
</head>
<form action="http://localhost.WebProg.php" method="post" name="form2">
<p>How many text fields you want to create? Enter the number below!</p>
Input: <input type="text" name="txtInput">
<input type="button" name="btnInput" value="Create" onclick="createTextField();">
</form>
</html>
Please Replace this line:
var userInput = parseInt(document.form2.txtInput.view);
To
var userInput = parseInt(document.getElementsByName('txtInput')[0].value);
function createTextField(){
// alert(document.getElementById('txtInput').value);
var userInput = parseInt(document.getElementsByName('txtInput')[0].value);
for(var i=0; i<userInput;i++)
{
document.write('<input type="text">');
}
}
<html>
<head>
<title>Create text Fields according to the users choice!</title>
</head>
<form action="http://localhost.WebProg.php" method="post" name="form2">
<p>How many text fields you want to create? Enter the number below!</p>
Input: <input type="text" name="txtInput" id="txtInput">
<input type="button" name="btnInput" value="Create" onclick="createTextField();">
</form>
</html>
You shouldn't use document.write. The correct way to do it is to append the inputs to a div.
Demo on Fiddle
HTML:
<form action="http://localhost.WebProg.php" method="post" name="form2">
<p>How many text fields you want to create? Enter the number below!</p>Input:
<input type="text" name="txtInput" />
<input type="button" name="btnInput" value="Create" />
<div></div>
</form>
JavaScript:
var btn = document.getElementsByTagName("input")[1];
btn.onclick = function () {
var userInput = parseInt(document.getElementsByTagName("input")[0].value, 10);
for (var i = 0; i <= userInput - 1; i++) {
document.getElementsByTagName("div")[0].innerHTML += "<input type='text' />"
}
};
Jquery is better option to add dynamic input/div's easy to manipulate DOM.
Check the following code
<div class="box">
<label> Enter input value </label>
<input type="number" id="in_num"/>
<button type="button" id="submit"> submit </button>
<h3> Append input values</h3>
<div id="dynamicInput"></div>
</div>
$(document).ready(function(e){
$('#submit').click(function(){
var inputIndex = $('#in_num').val();
for( var i=0; i<inputIndex; i++)
{
$('#dynamicInput').append('<input type=text id=id_'+ i +'/>');
}
});
});
Demo URl: http://jsfiddle.net/sathyanaga/75vbgesm/3/
Change:
var userInput = parseInt(document.form2.txtInput.view);
To:
var userInput = parseInt(document.getElementById("txtInput").value);
And give the input textbox an id (I used "txtInput", but it can be anything).
I believe you also need to change the loop from, when I typed "2" it created 3 inputs instead of 2.

Adding textbox on button click with javascript

I'm working on a web form with a textbox for pets and an "add pet" button. Each time the button is clicked, an additional textbox should be displayed below the original one.
I'm assuming this would be accomplished with an onclick event, but I can't figure out how to get it to work.
Here is the code I have so far:
<html>
<head>
<title>Project 4</title>
</head>
<body>
<form name="myForm" onsubmit="return validateForm()">
Pets: <input type="text" id="pets">
<input type="button" id="addPet" value="Add Pet">
<br>
</form>
<script type="text/javascript">
function makeCopy() {
var copy = <input type="text">;
return copy;
}
</script>
</body>
</html>
There are other pieces to this as well, but none of them affect this particular problem I am having so didn't see the need to include the full code as it's fairly long.
Any suggestions are greatly appreciated.
Update:
I realize after reading the answers that I should've included more of my code to give you guys a better idea of the actual layout of my page. I have several text fields in my form and need the additional textboxes to be displayed right below the original "pets" textbox. Here's a jfiddle I threw together to give you guys a better idea of the layout. http://jsfiddle.net/a5m8nqwk/
Something like this?
<form name="myForm" id="myForm" onsubmit="return validateForm()">
Pets: <br />
<input type="text" id="pets" />
<input type="button" id="addPet" value="Add Pet" />
<br/>
</form>
document.getElementById("addPet").onclick = function() {
var form = document.getElementById("myForm");
var input = document.createElement("input");
input.type = "text";
var br = document.createElement("br");
form.appendChild(input);
form.appendChild(br);
}
Edit: I'd suggest using a table to style the input boxes, keep them in line. FIDDLE
You could easily add elements to the DOM:
function createPetField() {
var input = document.createElement('input');
input.type = 'text';
input.name = 'pet[]';
return input;
}
var form = document.getElementById('myForm');
document.getElementById('addPet').addEventListener('click', function(e) {
form.appendChild(createPetField());
});
function add(type) {
//Create an input type dynamically.
var element = document.createElement("input");
var text = document.getElementById("textId");
//Append the element in page (in span).
text.appendChild(element);
}
h1 {
color: #0000ff;
}
<h1>KIAAT</h1>
<b>Adding textbox on button click with javascript</b>
<br><br>
<form>
<input placeholder="text" name="element" hidden> </input>
<input type="button" value="Click Me" onclick="add(document.forms[0].element.value)"/>
<span id="textId"> </span>
</form>

In which TextBox is the cursor.?

I have 4 textboxes and a submit button in my web page.
Suppose the user enters data in 2 fields and then clicks the submit button.
I now want to know in which textbox the cursor was located just before the submit button was clicked.
Any idea on how to do this in Javascript?
You're looking for document.activeElement, which returns the currently focused element.
Your question does specifically say in javascript, but FWIW here is another option in jQuery:
Working jsFiddle here
HTML:
<input id="in1" type="text" /><br />
<input id="in2" type="text" /><br />
<input id="in3" type="text" /><br />
<input id="in4" type="text" /><br />
<input type="button" id="mybutt" value="Submit" />
jQuery:
var inFocus = false;
$('input, textarea').focus(function() {
inFocus = $(this).attr('id');
});
$('#mybutt').click(function() {
alert('Cursor was last in element id: ' + inFocus);
});
you can use document.activeElement
here is the simple example for the same.
<head>
<script type="text/javascript">
function GetActive () {
if (document.activeElement) {
var output = document.getElementById ("output");
output.innerHTML = document.activeElement.tagName;
}
}
</script>
</head>
<body onclick="GetActive ();">
Click anywhere on the page to get the active element
<input id="myInput" value="input field" />
<button>Sample button</button>
<div id="output"></div>
</body>

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