Develop Reference

getting the incremental input spinner + & - to update label text fields

my javascript isn't the best. I have some code here in the form of a calculator:
https://jsfiddle.net/yadL05aL/
my javascript:
// Get a list of your products and pop them into a dropdownlist
function GetProducts() {
var products = V12.getFinanceProducts();
var ddlProducts = document.getElementById('productsList');
for (var i = 0; i < products.length; i++) {
var newItem = new Option(products[i].name, products[i].productId);
ddlProducts.appendChild(newItem);
}
}
// Get details of repayments for the product selected
function CalculateRepayments() {
var productId = $('#productsList').val(); // selected product
var financeProduct = V12.getFinanceProduct(productId); // get the object
var cashPrice = $('#cashPrice').val();
var depositFactor = $('#deposit').val();
var deposit = cashPrice * (depositFactor / 100);
var payments = V12.calculate(financeProduct, cashPrice, deposit);
PopulateDescription(payments);
}
function UpdateLoanInfo() {
$('#cashPrice').val($('#cpRange').val());
$('#deposit').val($('#depRange').val());
CalculateRepayments();
}
// Show repayment plan details in the description
function PopulateDescription(payments) {
$('#lblFinalPayment').html('');
$('#lblDeposit').html('£' + payments.deposit);
$('#lblInitPayments').html('£' + payments.initialPayments);
$('#lblTotalRepayable').html('£' + payments.amountPayable);
$('#lblInterest').html(payments.apr + '%');
if (payments.initialPayments != payments.finalPayment && payments.finalPayment > 0) {
$('#lblMonths').html(payments.months - 1);
$('#lblFinalPayment').html(' and a final payment of £' + payments.finalPayment);
} else {
$('#lblMonths').html(payments.months);
}
}
// Firing this will loop through your V12 products and grab the product with the lowest
// possible monthly payments.
function GetLowestMonthlyPayments() {
var products = V12.getFinanceProducts();
var lowestMonthlyPayment = 0;
var lowestMonthlyPaymentProductId = 0;
for (var i = 0; i < products.length - 1; i++) {
var product = V12.getFinanceProduct(products[i].productId);
var cashPrice = $('#cashPrice').val();
var depositFactor = $('#deposit').val();
var deposit = cashPrice * (depositFactor / 100);
var payments = V12.calculate(product, cashPrice, deposit);
var monthlyPayment = payments.initialPayments;
if (parseFloat(lowestMonthlyPayment) > parseFloat(monthlyPayment) || lowestMonthlyPayment == 0) {
lowestMonthlyPayment = payments.initialPayments;
lowestMonthlyPaymentProductId = product.productId;
}
}
$("#productsList").val(lowestMonthlyPaymentProductId);
CalculateRepayments();
}
// Ready up our events
(function ($) {
GetProducts();
CalculateRepayments();
$('#productsList').on('change', function () {
CalculateRepayments();
});
$('#cpRange, #depRange').on("input", function () {
UpdateLoanInfo();
});
$('#lowestMonthlyPayments').click(function () {
GetLowestMonthlyPayments();
});
$('#cashPrice, #deposit').keyup(function () {
var cp = $('#cashPrice').val();
var dep = $('#deposit').val();
$('#cpRange').val(cp);
$('#depRange').val(dep);
CalculateRepayments();
});
//spinner//
$('<div class="quantity-nav"><div class="quantity-button quantity-up">+</div><div class="quantity-button quantity-down">-</div></div>').insertAfter('.quantity input');
$('.quantity').each(function() {
var spinner = jQuery(this),
input = spinner.find('input[type="number"]'),
btnUp = spinner.find('.quantity-up'),
btnDown = spinner.find('.quantity-down'),
min = input.attr('min'),
max = input.attr('max');
btnUp.click(function() {
var oldValue = parseFloat(input.val());
if (oldValue >= max) {
var newVal = oldValue;
} else {
var newVal = oldValue + 100;
}
spinner.find("input").val(newVal);
spinner.find("#cpRange").val(cp);
spinner.find("#depRange").val(dep);
spinner.find("input, #cashPrice").trigger("change");
});
btnDown.click(function() {
var oldValue = parseFloat(input.val());
if (oldValue <= min) {
var newVal = oldValue;
} else {
var newVal = oldValue - 100;
}
spinner.find("input").val(newVal);
spinner.find("input").trigger("change");
});
});
})(jQuery);
what I am trying to achieve is when you click on the plus and minus buttons in the cash price input, the bottom labels reflect the decrease or increment changes to the deposit / monthly repayments & APR.
Can anyone please point me in the right direction?
Kind regards
Robbie

Multiplying variables and showing result in a box

I'm having a problem when trying to multiply the totalPallets by the price-per-pallet ($25) and then showing that in the productSubTotal box. With the code as it is right now, the quatity total shows but when I try to get the price result, it doesn't show the operation. Also, if I try changing anythung from the code, the whole thing breaks down. I'll be thankful if anyone could help me. Thanks
// UTILITY FUNCTIONS
function IsNumeric(n) {
return !isNaN(n);
}
function calcTotalPallets() {
var totalPallets = 0;
$(".num-pallets-input").each(function() {
var thisValue = parseInt($(this).val());
if ( (IsNumeric(thisValue)) && (thisValue != '') ) {
totalPallets += parseInt(thisValue);
};
});
$("#quantitytotal").val(totalPallets);
}
function calcProdSubTotal() {
var prodSubTotal = 0;
$(".totalprice").each(function() {
var valString = parseInt(totalPallets) * multiplier;
prodSubTotal += parseInt(valString);
});
$("#product-subtotal").val(CommaFormatted(prodSubTotal));
};
// "The Math" is performed pretty much whenever anything happens in the quanity inputs
$('.num-pallets-input').bind("focus blur change keyup", function(){
// Caching the selector for efficiency
var $el = $(this);
// Grab the new quantity the user entered
var numPallets = CleanNumber($el.val());
var totalPallets = CleanNumber($el.val());
var prodSubTotal = CleanNumber($el.val());
// Find the pricing
var multiplier = $el
.parent().parent()
.find("td.price-per-pallet span")
.text();
};
// Calcuate the overal totals
calcProdSubTotal();
calcTotalPallets();
});
function CommaFormatted(amount) {
var delimiter = ",";
var i = parseInt(amount);
if(isNaN(i)) { return ''; }
i = Math.abs(i);
var minus = '';
if (i < 0) { minus = '-'; }
var n = new String(i);
var a = [];
while(n.length > 3)
{
var nn = n.substr(n.length-3);
a.unshift(nn);
n = n.substr(0,n.length-3);
}
if (n.length > 0) { a.unshift(n); }
n = a.join(delimiter);
amount = "$" + minus + n;
return amount;
}
});

How to display a div with random ID without repeating it using jQuery?

I have a function to select a random number from 0 to 45 and then I show the div with the specific ID. It's working fine but it repeats a number.
Can anyone advise so it won't repeat numbers?
I call the function onclick like this
$(".skip").click(function () {
scared++;
$("#counter").html("My current count is: " + dared);
var d = 50;
/*$(".question").addClass("hideMe");
$(this).parents("div").next("div").removeClass("hideMe");*/
var r = Math.round(Math.random() * 44) + 1;
var newquestion = "q" + r;
$('.active').removeClass("active");
$("#" + newquestion).addClass("active");
if (scared > 44) {
$('.main').fadeOut('fast');
$('.logo').switchClass("logo", "share");
$('.progress').css("display", "none");
$('.share-game').css("display", "block");
$('.hero').css("right", "-240px");
$('#score-total').html(score + '');
} else {
}
$('.red-line').append('<div id="children' + (d++) + '" class="red"></div>');
return false;
});

You can see what i did.
var usedNumbers = [];
var randomNumbers = [];
$(function() {
//Getting 20 random numbers
for (i = 0; i < 20; i++) {
randomNumbers.push(getRandomNumber());
}
console.log(randomNumbers);
function getRandomNumber() {
var hasInArray = true;
do {
var r = Math.round(Math.random() * 44) + 1;
if (usedNumbers.indexOf(r) === -1) {
usedNumbers.push(r);
hasInArray = false;
return r;
}
} while (hasInArray === true);
}
});
Warning to not set the numbers of randomnumbers more then what you want to get, because that will cause an infinite loop!

Use an array to capture the used numbers and then check that array on each click, generating a new number if that one is found. It resets back to an empty array when it is full.
var savedNumbers = [];
function getRandom() {
if (savedNumbers.length === 45) {
savedNumbers = [];
}
var r = Math.round(Math.random() * 44) + 1;
if (savedNumbers.indexOf(r) > -1) {
getRandom();
} else {
savedNumbers.push(r);
return r;
}
}
DEMO

How to submit the value of an input field?

I have a math game that works partially. What I need to have happen is to take the values of the divs (one is x and the other is y), type in the answer of those two multiplied, be able to submit it and refresh to solve another.
Any help would be much appreciated!
http://jsfiddle.net/justinw001/Mttw6/11/
<script type="text/javascript">
function myFunction() {
score = 0;
var number = document.getElementById('inputElement').value;
questionAmount = number;
for(i = 0; i < questionAmount; i++) {
var x = Math.floor(Math.random() * 13);
var y = Math.floor(Math.random() * 13);
$('#input1').text(x);
$('#input2').text(y);
<!-- question = prompt('What is ' + x + ' * ' + y + ' = ?'); -->
question = document.getElementById('answer').value;
if(question == null || isNaN(question)) {
break;
}
if(question == x * y) {
score++;
}
}
alert('You got ' + score + ' out of ' + questionAmount + ' correct.');
}
</script>

Try to bind the process with your buttons. Clicking the left button, produce the questions.
And Clicking the right one, verify the answer.
Demo: Fiddle
var score = 0;
var questions = [];
// Generate questions
$('#gen').click(function () {
score = 0;
questions = [];
var questionAmount = parseInt($('#inputElement').val(), 10);
for (var i = 0; i < questionAmount; i++) {
var q = {
x: Math.floor(Math.random() * 13),
y: Math.floor(Math.random() * 13)
};
questions.push(q);
}
nextQuest(questions.pop());
});
// Verify the answer
$('#sub').click(function () {
var ans, x, y;
if (questions.length >= 0) {
ans = parseInt($('#answer').val(), 10);
x = parseInt($('#input1').text(), 10);
y = parseInt($('#input2').text(), 10);
if (ans === x * y) {
score++;
nextQuest(questions.pop());
} else {
alert('err');
}
}
});
var nextQuest = function (q) {
if (q) {
$('#input1').text(q.x);
$('#input2').text(q.y);
$('#answer').val('');
$('#inputElement').val(questions.length);
} else {
$('#input1, #input2').text('');
$('#answer, #inputElement').val('');
alert(score);
}
};

javascript function for calculating

I meet a trouble with a function. actually I need to make this function to perform a calculation on some text fields. When I worked on a single line no problems. But recently, someone asked to make a table with multiple lines (one line can be added dynamically) so, I do the following function so that it can not only duplicate line but id change all the fields concerned, so I add class to these fields. therefore I proceed as follows:
function clone(line) {
newLine = line.cloneNode(true);
line.parentNode.appendChild(newLine);
var tab = document.getElementsByClassName('libelle_debours')
var i = -1;
while (tab[++i]) {
tab[i].setAttribute("id", "_" + i);
};
var cab = document.getElementsByClassName('ht_no_tva')
var j = -1;
while (cab[++j]) {
cab[j].setAttribute("id", "_" + j);
};
var dab = document.getElementsByClassName('ht_tva')
var k = -1;
while (dab[++k]) {
dab[k].setAttribute("id", "_" + k);
};
var eab = document.getElementsByClassName('taux')
var l = -1;
while (eab[++l]) {
eab[l].setAttribute("id", "_" + l);
};
var fab = document.getElementsByClassName('tva')
var m = -1;
while (fab[++m]) {
fab[m].setAttribute("id", "_" + m);
};
}
function delRow() {
var current = window.event.srcElement;
//here we will delete the line
while ((current = current.parentElement) && current.tagName != "TR");
current.parentElement.removeChild(current);
}
The problem in fact is the second function that is used to make the calculation:
function calcdebours() {
var taux = document.getElementById('debours_taux_tva').value;
var ht_no_tva = document.getElementById('debours_montant_ht_no_tva').value;
var ht_tva = document.getElementById('debours_montant_ht_tva').value;
var tva = Math.round((((ht_tva) * (taux)) / 100) * 100) / 100;;
if (taux == '') {
taux = 0;
}
if (ht_no_tva == '') {
ht_no_tva = 0;
}
if (ht_tva == '') {
ht_tva = 0;
}
document.getElementById('debours_montant_tva').value = tva;
document.getElementById('debours_montant_ttc').value = (tva) + parseFloat(ht_tva) + parseFloat(ht_no_tva)
}
function
montant_debours() {
var ttc = document.getElementById('debours_montant_ttc').value;
var ttc2 = document.getElementById('debours_montant_ttc2').value;
if (ttc == '') {
var ttc = 0;
} else {
var ttc = document.getElementById('debours_montant_ttc').value;
}
if (ttc2 == '') {
var ttc2 = 0;
} else {
var ttc2 = document.getElementById('debours_montant_ttc2').value;
}
tx = parseFloat(ttc) + parseFloat(ttc2);
document.getElementById('ttc_cheque').value = Math.round(tx * 100) / 100;
}
As Id are not the same, do I have to create as many functions
there are lines?
Is it possible to fit a single function to process each line?
If so can you tell me how?

If I'm not mistaken you can use for loop and append increment to the end of element's id. Like this:
trs = document.getElementById('container Id').getElementsByTagName('tr');
For (var i = 1, i <= trs.length; i++)
{
var el = document.getElementById('debours_montant_ttc' + i);
}