We Keep Coding

how to create two dimentional matrix 2 inside javascript

I want to create two dimentional array matrix 2 inside javascript for input. But all of record datas are inside first input. I have to show relevant record data every input. Can you help me for two dimentional array.
HTML CODES
<div id="hiddenProduct">
<label>Company Product Number</label>
<select onchange="addProducts()" name="firmProductNumber" id="prdcts" class="form-control form-control-sm" style="width: 100%;">
<option value="0">Unselected</option>
<option #if($saproduct->firmProductNumber == 1 ) selected="true" id="btnProduct" onclick="addProducts()" #endif>1</option>
<option #if($saproduct->firmProductNumber == 2 ) selected="true" id="btnProduct" onclick="addProducts()" #endif>2</option>
</select>
<hr>
</div>
</div>
<div id="product" class="form-group col-md-4">
<div id="hiddenContainerP">
<div id="containerP"></div>
</div>
</div>
JavaScript Codes
function addProducts() {
var number = document.getElementById("prdcts").value;
var container = document.getElementById("containerP");
while (container.hasChildNodes()) {
container.removeChild(container.lastChild);
}
var p = [];
p = <?php echo json_encode($x); ?>
//Controller $x = []; $x[] = [$arrayProductName,$arrayProductAmount,$arrayProductAmountType];
for (i = 0; i < number; i++) {
// Append a node with a random text
// Create an <input> element, set its type and name attributes
var productName = document.createElement("input");
productName.type = "text";
productName.name = "name[]";
productName.value = p[[0][i]];
productName.className = "form-control form-control-sm";
productName.placeholder = "Product Name";
container.appendChild(productName);
var amount = document.createElement("input");
amount.type = "number";
amount.name = "amount[]";
amount.className = "form-control form-control-sm";
amount.placeholder = "Amount";
amount.value = p[[1][i]];
container.appendChild(amount);
var amountType = document.createElement("input");
amountType.type = "text";
amountType.name = "amountType[]";
amountType.value = p[[2][i]];
amountType.className = "form-control form-control-sm";
amountType.placeholder = "Amount Type";
container.appendChild(amountType);
container.appendChild(document.createElement("br"));
}
}
</script>```

How to use an input from a select option in html with javascript?

I want to assign a drop down option to a unique ID so that when it is selected, the javascript will take that ID and turn it into a variable which I can use to display the cost.
This is what I have so far:
<form>
<select>
<option name ="Bristol "value="40.0" id="BN1">Bristol - Newcastle</option>
</select>
<button type="button" onclick="BookingFare(); return false;">Submit</button><br>
</form>
function BookingFare() {
var price = 0;
//var ofAdults = document.getElementById('adults').value;
//var ofChildren = document.getElementById('children').value;
var BN1 = document.getElementById('BN1').value;
if (BN1) {
var price = price + 40;
}
document.getElementById('priceBox').innerHTML = price;
}
I can't get it to display the price, even when I just try to get it to print out "hello" when BN1 is selected it doesn't work. Can anyone tell me what I'm missing?

function BookingFare() {
var price = 0;
//var ofAdults = getElementById('adults').value;
//var ofChildren = getElementById('children').value;
var BN1 = document.getElementById('BN1').value;
if (BN1) {
var price = price + 40;
}
document.getElementById('priceBox').innerHTML = price;
}
<form>
<select id="BN1">
<option name ="Bristol "value="40.0" >Bristol - Newcastle</option>
</select>
<button type="button" onclick="BookingFare(); return false;">Submit</button><br>
</form>
<label id='priceBox'></label>

Javascript OnChange not firing on first change

I have an issue concerning an 'onchange' event within a select html element. The code i have written is supposed to display certain text boxes depending on which select option has been selected.
The code I have is as follows:
Customer Type:
<select name="customerType" onchange="cust_type()">
<option value="" selected>Customer Type?</option>
<option value="nonCorp">Customer</option>
<option value="corp">Corporate</option>
</select>
JS:
function cust_type() {
var select_drop = document.getElementsByName('customerType');
var selected = select_drop[0].value;
var f_name = document.getElementById('forename');
var s_name = document.getElementById('surname');
var c_name = document.getElementById('companyName');
if(selected == "") {
f_name.style.visibility = 'hidden';
s_name.style.visibility = 'hidden';
c_name.style.visibility = 'hidden';
f_name.value = "";
s_name.value = "";
c_name.value = "";
}
if(selected == "nonCorp") {
f_name.style.visibility = 'visible';
s_name.style.visibility = 'visible';
c_name.style.visibility = 'hidden';
c_name.value = "";
}
if(selected == "corp") {
f_name.style.visibility = 'hidden';
s_name.style.visibility = 'hidden';
c_name.style.visibility = 'visible';
f_name.value = "";
s_name.value = "";
}
}
The problem I am experiencing is that when I change the option in the select menu the first time, the onchange has no effect. However on the second, third etc etc it seems to be working perfectly fine.
Thank you for taking the time to read my question.

Did you try to add the event in JavaScript ?
var yourSelectElement = document.getElementById('test');
yourSelectElement.onchange = cust_type;
Let see : http://jsfiddle.net/YtuxP/
Do you try to do that ?

Fix:
Instead of directly changing the visibility of the text boxes I wrapped them in separate divs. The code solution is as follows.
HTML:
Customer Type:
<select name="customerType" onchange="cust_type()">
<option value="" selected>Customer Type?</option>
<option value="nonCorp">Customer</option>
<option value="corp">Corporate</option>
</select>
<div id="nonCorpCustDetails" class="custDetails" style="visibility:hidden">
Forename <input type="text" name="forename" id="forename" onchange="submit_check()" />
Surname <input type="text" name="surname" id="surname" onchange="submit_check()" /.
</div>
<div id="corporateCustDetails" class="custDetails" style="visibility:hidden">
Company Name <input type="text" name="companyName" id="companyName" onchange="submit_check()" />
</div>
JS function:
function cust_type() {
var select_drop = document.getElementsByName('customerType');
var selected = select_drop[0].value;
var f_name = document.getElementById('forename');
var s_name = document.getElementById('surname');
var c_name = document.getElementById('companyName');
var nonCorp = document.getElementById('nonCorpCustDetails');
var corp = document.getElementById('corporateCustDetails');
if(selected == "") {
nonCorp.style.visibility = 'hidden';
corp.style.visibility = 'hidden';
f_name.value = "";
s_name.value = "";
c_name.value = "";
}
if(selected == "nonCorp") {
nonCorp.style.visibility = 'visible';
corp.style.visibility = 'hidden';
c_name.value = "";
}
if(selected == "corp") {
nonCorp.style.visibility = 'hidden';
corp.style.visibility = 'visible';
f_name.value = "";
s_name.value = "";
}
}

Getting error "Unexpected Token" in HTML DOM script for a HTML form

I'm developing an android app with phonegap. I'm trying to use an HTML form in one of the pages and I've been told that I should use HTML DOM. I've made the script but I got a error saying: Unexpected token.
Here's the sample code in HTML:
<form name="editNoteForm" id="formaltera" method="post" action="index.html">
<div data-role="fieldcontain">
<label for="primeiroNome">Primeiro Nome</label>
<input type="text" name="primeiroNome" id="primeiroNome">
</div>
<div data-role="fieldcontain">
<label for="ultimoNome">Ultimo Nome</label>
<input type="text" name="ultimoNome" id="ultimoNome">
</div>
<div data-role="fieldcontain">
<label for="numeroTelefone">Telefone</label>
<input type="number" name="numeroTelefone" id="numeroTelefone">
</div>
<div data-role="fieldcontain">
<input type="submit" id="submit" value="Guardar">
</div>
</form>
And here's the script I made so I can get something like the HTML code above.
<form name="formaltera" id="formaltera" method="post" action="index.html"></form>
<script charset="utf-8" language="javascript">
var temp1 = localStorage.getItem("selected");
var temp = localStorage.getItem(temp1);
temp = temp.split(";");
var firstName = temp[0];
var lastName = temp[1];
var phoneNumber = temp[2];
var form = document.getElementById('formaltera');
var formBody = form.childNodes[0];
var div = document.createElement('div');
var inputTextA = document.createElement('input');
var inputTextB = document.createElement('input');
var inputTextC = document.createElement('input');
var inputSubmit = document.createElement('input');
var labelA = document.createElement('label');
var labelB = document.createElement('label');
var labelC = document.createElement('label');
var labelTextA = document.createTextNode('Primeiro Nome');
var labelTextB = document.createTextNode('Ultimo Nome');
var labelTextC = document.createTextNode('Telefone');
div.data-role = "fieldcontain";
labelA.for = "primeiroNome"; //I'm getting an error in here
labelB.for = "ultimoNome";
labelC.for = "numeroTelefone";
inputTextA.type = "text";
inputTextA.name = "primeiroNome";
inputTextA.id = "primeiroNome";
inputTextA.value = firstName;
inputTextB.type = "text";
inputTextB.name = "ultimoNome";
inputTextB.id = "ultimoNome";
inputTextB.value = lastName;
inputTextC.type = "number";
inputTextC.name = "numeroTelefone";
inputTextC.id = "numeroTelefone";
inputTextC.value = phoneNumber;
inputSubmit.type = "submit";
inputSubmit.name = "submit";
inputSubmit.id = "submit";
inputSubmit.value = "Guardar";
form.appendChild(div);
div.appendChild(labelA);
labelA.appendChild(labelTextA);
div.appendChild(inputTextA);
form.appendChild(div);
div.appendChild(labelB);
labelA.appendChild(labelTextB);
div.appendChild(inputTextB);
form.appendChild(div);
div.appendChild(labelC);
labelA.appendChild(labelTextC);
div.appendChild(inputTextC);
form.appendChild(div);
div.appendChild(inputSubmit));
</script>
The HTML code could be a bit different from the script I've made because I wrote it just to elucidate you. Thanks in advance. Hope I'm explaining myself well.

the for attribute should be assigned through htmlFor property
labelA.htmlFor = ...
See https://developer.mozilla.org/en-US/docs/DOM/HTMLLabelElement for further reference

add a new text field every time a button is pressed

i am trying to create a bit of javascript that will create a new text field every time a button is pressed, any help would be appreciated, it seems like the javascript doesn't want to run more than once
<!DOCTYPE html>
<html>
<head>
<title>Q&A Admin Panel</title>
</head>
<body>
<h1>Q&A Admin Panel</h1>
<form action="add_question.php" method="post">
Question Type: <input type="text" id="questionType" />
Question Name: <input type="text" id="questionName" />
Question Text: <input type="text" id="questionText" />
<select id="myList" onchange="selectType()">
<option>Yes or No</option>
<option>Multiple Choice</option>
<option>Multiple Select</option>
<option>Open Response</option>
</select>
<div id='buttons'> </div>
</form>
<script type="text/javascript">
function selectType()
{
var type=document.getElementById("myList");
if(type == "Multiple Choice" or type == "Multiple Select"){
// add answer = visible
}
}
</script>
<script type="text/javascript">
var answers = 0;
function addAnswer()
{
write = document.getElementById('buttons');
write.innerHTML = write.innerHMTL + "add answer: <input type=\"text\" id=\"answer" + answers + "\" <br>";
answers = answers + 1;
}
</script>
<button onclick="addAnswer(); return false;">add answer</button>
</body>
</html>

var answers = 0,
write = document.getElementById('buttons');
function addAnswer() {
write.innerHTML += 'Add answer: <input type="text" id="answer"' + answers + '/> <br />';
answers++;
}​

I faced the same problem in my college project. You can also accomplish your work as David suggested, but using innerHTML doesn't add elements to DOM and as a result, when you'll refresh the page, text fields will disappear. So for getting persistent text fields, you can use the code mentioned below:
var i = 0;
function addMore()
{
var x = document.getElementById('buttons');
var input1 = document.createElement("input");
input1.setAttribute("type","text");
input1.setAttribute("name","i" + i );
x.appendChild( input1 );
i++;
}
You can use firebug for debugging javascript things.
Thanks.

function addTextField(id){
var colors = new Array('#660000','#33ff00','#0066ff','#cc3399','#9966ff');
var container = document.getElementById(id);
var ulElement = document.createElement('ul');
container.appendChild(ulElement);
var hideLink = function(){
var firstElement = ulElement.firstChild.getElementsByTagName('a')[0];
firstElement.style.display = (ulElement.childNodes.length==1)?'none':'inline';
for(var i = 0 ; i <ulElement.childNodes.length; i++)
ulElement.childNodes[i].style.color = colors[i%5];
}
var addListElement = function(){
var liElement = document.createElement('li');
ulElement.appendChild(liElement);
var textElement = document.createElement('input');
textElement.setAttribute('type','text');
liElement.appendChild(textElement);
var deleteLink = document.createElement('a');
deleteLink.href = "#";
deleteLink.appendChild(document.createTextNode('delete'));
liElement.appendChild(deleteLink);
deleteLink.onclick = function(){
ulElement.removeChild(liElement);
hideLink();
}
hideLink();
}
addListElement();
var anchorElement = document.createElement('a');
anchorElement.href = "#";
anchorElement.appendChild(document.createTextNode('Add more'));
container.appendChild(anchorElement);
anchorElement.onclick = addListElement;
hideLink();
}
Here is the Demo
http://jsfiddle.net/mannejkumar/cjpS2/