How to calculate tax in salary - javascript

I am working on a payroll project in which I want to calculate overtime, allowance and tax to salary. I want to add overtime and allowance to salary and subtract tax from salary.
The following script works with overtime and allowance but I'm facing problems with calculating tax.
When I enter a tax percentage it should calculate the tax amount from the salary to the tax field and calculate the total. When I enter the tax directly it should calculate the percentage to the taxPercentage field and calculate the total.
$(document).on('change keyup blur', '.add', function(e) {
add();
});
function add() {
salary = $('#salary').val();
allowance = $('#allowance').val() || 0;
over = $('#over').val() || 0;
prevTotal = $('#total').val() || 9000;
if (allowance > 0 || over > 0) {
total = parseFloat(salary) + parseFloat(allowance) + parseFloat(over);
$('#total').val(total);
} else {
$('#total').val(prevTotal);
}
}
$(document).on('change keyup blur', '.tax', function(e) {
subtracttax();
});
function subtracttax() {
salary = $('#salary').val();
taxPercentage = $('#taxPercentage').val() || 0;
tax = $('#tax').val() || 0;
prevTotal = $('#total').val() || 9000;
if (taxPercentage > 0) {
total = parseFloat(salary) * parseFloat(taxPercentage) / 100;
$('#tax').val(total);
$('#total').val(prevTotal - total);
} else {
$('#total').val(prevTotal);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<div>
<label> salary </label>
<input type="text" id="salary" value="9000" />
</div>
<br>
<div>
<label> over Time </label>
<input type="text" class="add" id="over" />
</div>
<br>
<div>
<label> allowance </label>
<input type="text" class="add" id="allowance" />
</div>
<br>
<div>
<label> Tax Percentage</label>
<input type="text" class="tax" id="taxPercentage" />
</div>
<br>
<div>
<label> Total Tax</label>
<input type="text" class="tax" id="tax" />
</div>
<br>
<div>
<label> Total salary</label>
<input type="text" id="total" />
</div>

Try like this.
as per your comment I only added salary + over time.
calculateTax();
$(document).on('change keyup blur', '.tax', function(e) {
calculateTax();
});
$(document).on('change keyup blur', '.taxVal', function(e) {
calculateTaxPer();
});
function calculateTax() {
salary = $('#salary').val();
allowance = $('#allowance').val() || 0;
over = $('#over').val() || 0;
total = (parseFloat(salary) + parseFloat(allowance) + parseFloat(over)) || 0;
taxPercentage = $('#taxPercentage').val() || 0;
tax = $('#tax').val() || 0;
$('#total').val(total);
if (taxPercentage > 0) {
totalTax = (parseFloat(salary) + parseFloat(over)) * parseFloat(taxPercentage) / 100;
$('#tax').val(totalTax);
$('#total').val(total - totalTax);
return false;
}
}
function calculateTaxPer(){
salary = $('#salary').val();
allowance = $('#allowance').val() || 0;
over = $('#over').val() || 0;
total = (parseFloat(salary) + parseFloat(allowance) + parseFloat(over)) || 0;
taxPercentage = $('#taxPercentage').val() || 0;
tax = $('#tax').val() || 0;
$('#total').val(total);
if(tax > 0){
taxPer = (parseFloat(tax)/(parseFloat(salary) + parseFloat(over)))*100;
$('#taxPercentage').val(taxPer);
$('#total').val(total - tax);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<div>
<label> salary </label>
<input type="text" id="salary" value="9000" />
</div>
<br>
<div>
<label> over Time </label>
<input type="text" class="tax" id="over" />
</div>
<br>
<div>
<label> allowance </label>
<input type="text" class="tax" id="allowance" />
</div>
<br>
<div>
<label> Tax Percentage</label>
<input type="text" class="tax" id="taxPercentage" />
</div>
<br>
<div>
<label> Total Tax</label>
<input type="text" class="taxVal" id="tax" />
</div>
<br>
<div>
<label> Total salary</label>
<input type="text" id="total" />
</div>

change this line in subtracttax function
prevTotal = $('#total').val() || 9000;
to
prevTotal = parseFloat(salary) + parseFloat(allowance) + parseFloat(over);
Problem is you are overriding the total value once the tax value is entered. Instead you should calculate totals each time you make changes.

Related

When I click the Calculate button, it does not display the calculations in textbox for sales tax and total

When I run the code on my chrome browser, clicking the calculate button, it does not put the value in the Total and Sales Tax text box.
Also "Add the Javascript event handler for the click event of the Clear button, This should clear all text boxes and move the cursor to the Subtotal field."
I'm using Html and js file. Using a function expression to calculate and display my calculation, then also use the clear button to clear all text boxes.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sales Tax Calculator</title>
<link rel="stylesheet" href="styles.css" />
<script src="sales_tax.js"></script>
</head>
<body>
<main>
<h1>Sales Tax Calculator</h1>
<p>Enter Subtotal and Tax Rate and click "Calculate".</p>
<label for="subtotal">Subtotal:</label>
<input type="text" id="subtotal" ><br>
<label for="tax_rate">Tax Rate:</label>
<input type="text" id="tax_rate" ><br>
<label for="sales_tax">Sales Tax:</label>
<input type="text" id="sales_tax" disabled ><br>
<label for="total">Total:</label>
<input type="text" id="total" disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calculate" >
<input type="button" id="clear" value="Clear" ><br>
</main>
</body>
</html>
This is my js file.
var $ = function (id) {
return document.getElementById(id);
};
var SumSalesTax = function (sub, rate){
var sales_tax = (sub * rate);
sales_tax = sales_tax.toFixed(2);
var total = (sub * rate + sub);
total = total.toFixed(2);
return sales_tax, total;
}
var processEntries = function() {
var sub = parseFloat($("subtotal").value);
var rate = parseFloat($("tax_rate").value);
if (sub < 0 && sub > 10000 && rate < 0 && rate > 12) {
alert("Subtotal must be > 0 and < 1000, and Tax Rate must be >0 and < 12.
")
} else {
$("sales_tax").value = SumSalesTax(sub, rate);
$("total").value = SumSalesTax(sub, rate);
}
};
window.onload = function() {
$("calculate").onclick = processEntries;
$("clear").onclick = sumSalesTax;
};
Sales Tax Calculator
It seems like you had a typo when you were doing $("clear").onclick = sumSalesTax;, as the variable was named SumSalesTax rather than with the lower case. This meant that the code block errored out and therefore didn't actually run. Make sure you make good use of the browser console so you can spot errors like this! The below example should work
var $ = function (id) {
return document.getElementById(id);
};
var SumSalesTax = function (sub, rate){
var sales_tax = (sub * rate);
sales_tax = sales_tax.toFixed(2);
var total = (sub * rate + sub);
total = total.toFixed(2);
return sales_tax, total;
}
var processEntries = function() {
var sub = parseFloat($("subtotal").value);
var rate = parseFloat($("tax_rate").value);
if (sub < 0 && sub > 10000 && rate < 0 && rate > 12) {
alert("Subtotal must be > 0 and < 1000, and Tax Rate must be >0 and < 12.")
} else {
$("sales_tax").value = SumSalesTax(sub, rate);
$("total").value = SumSalesTax(sub, rate);
}
};
window.onload = function() {
$("calculate").onclick = processEntries;
$("clear").onclick = SumSalesTax;
};
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sales Tax Calculator</title>
<link rel="stylesheet" href="styles.css" />
<script src="sales_tax.js"></script>
</head>
<body>
<main>
<h1>Sales Tax Calculator</h1>
<p>Enter Subtotal and Tax Rate and click "Calculate".</p>
<label for="subtotal">Subtotal:</label>
<input type="text" id="subtotal" ><br>
<label for="tax_rate">Tax Rate:</label>
<input type="text" id="tax_rate" ><br>
<label for="sales_tax">Sales Tax:</label>
<input type="text" id="sales_tax" disabled ><br>
<label for="total">Total:</label>
<input type="text" id="total" disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calculate" >
<input type="button" id="clear" value="Clear" ><br>
</main>
</body>
</html>

Simple js calculator with radio tag

I found subjects like mine but I could not fix my problem. So I wanted to calculate the cost of tickets form radio tags by multiplying the price with the amount of tickets using if statements for each option without jquery. I can not figure it out why I do not have an output. It looks like none of my functions work and I can not find why.
Can you help me please, I know it is easy but I am still a beginner
<!doctype html>
<html>
<head>
<title>No Boundaries</title>
<link rel="stylesheet" href="styles1.css">
<script type="text/javascript">
function validate(){
if(!document.form1.cond.checked)
{alert("Please accept the Terms and Conditions");
return false;
}
if(document.form1.name.value.length < 2)
{alert(“Please enter your full name, not just an initial”);
return false;
}
return true;
}
function cost() {
if (document.form1.accom["v"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 90 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.accom["t"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 150 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.accom["c"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 45 * amount;
document.form1.total1.value = ans;
}
}
function post(){
if(document.form1.del["1"].checked){
var num = 0;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["2"].checked){
var num = 12;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["3"].checked){
var num = 16;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["4"].checked){
var num = 20;
var ans = num;
document.form1.total2.value = ans;
}
}
function damage(){
var total1 = parseInt(document.form1.total1.value);
var total1 = parseInt(document.form1.total1.value);
var ans = total1 + total2;
document.form.total3.value = ans;
}
</script>
</head>
<body>
<section>
<form name="form1">
<fieldset>
<legend>Personal details</legend>
<div>
Please enter your full name<br>
<input name="name" type="text" required onsubmit="return validate();"><br>
</div>
<div>
Address<br>
<input name="addresss" type="text" required><br>
<input type="text"><br>
<input type="text"><br>
<input type="text"><br>
</div>
<div>
Phone Number<br>
<input name="phone" type="tel"><br>
</div>
<div>
Email Address<br>
<input name="email" type="email" required><br>
</div>
<div>
Date of Birth<br>
<input name="birth" type="date"><br>
</div>
</fieldset>
<fieldset>
<legend>Ticket Details</legend>
<div>
Type of T<br>
<label for="vil">V</label>
<input type="radio" name="accom[]" value="v">
<label for="town">T</label>
<input type="radio" name="accom[]" value="t">
<label for="con">C</label>
<input type="radio" name="accom[]" value="c">
</div>
<div>
Quantity of T
<input name="amount" type="number" min="1" max="10" required><br>
<br>
<input type="button" name="cost" value="C C" onclick="cost();"><br>
</div>
<div>
Delivery Options<br>
<input type="radio" name="del[]" value="1" >Free<br>
<input type="radio" name="del[]" value="2" >£12<br>
<input type="radio" name="del[]" value="3" >£16<br>
<input type="radio" name="del[]" value="4" >£20<br>
<br>
<input type="button" value="C D" onclick="post();"><br>
</div>
</fieldset>
<fieldset>
<legend>Terms And Conditions</legend>
<input name="cond" type="checkbox" onsubmit="return validate();">
</fieldset>
<fieldset>
<legend>Cost</legend>
<input type="text" name="total1" readonly><br>
<input type="text" name="total2" readonly><br>
<input type="text" name="total3" readonly><br>
<br>
<input type="button" value="C F C" onclick="damage();"><br>
</fieldset>
<br><br>
<fieldset>
<input type="submit">
</fieldset>
</form>
</section>
</body>
</html>
the cost function should be something like this,
function cost() {
if (document.form1.accom.value.toLowerCase() == "v") {
var amount = parseInt(document.form1.amount.value);
var ans = 90 * amount;
document.form1.total1.value = ans;
} else if (document.form1.accom.value.toLowerCase() == "t") {
var amount = parseInt(document.form1.amount.value);
var ans = 150 * amount;
document.form1.total1.value = ans;
} else if (document.form1.accom.value.toLowerCase() == "c") {
var amount = parseInt(document.form1.amount.value);
var ans = 45 * amount;
document.form1.total1.value = ans;
}
}
And to make the code more refactored, make it like this,
function cost() {
var val = document.form1.accom.value.toLowerCase();
var amount = parseInt(document.form1.amount.value);
var ans;
if (val == "v") {
ans = 90 * amount;
} else if (val == "t") {
ans = 150 * amount;
} else if (val == "c") {
ans = 45 * amount;
}
document.form1.total1.value = ans;
}
Ok I found your errors. This is the code for html
<div>
Type of T<br>
<label for="vil">V</label>
<input type="radio" name="accom" value="v">
<label for="town">T</label>
<input type="radio" name="accom" value="t">
<label for="con">C</label>
</div>
<div>
Quantity of T
<input name="amount" type="number" min="1" max="10" required><br>
<br>
<input type="button" name="cost" value="C C" onclick="costs();"><br>
</div>
Next, in your javascript you have tho change the name of function; instead of cost you have to renaming in costs
function costs() {
if (document.form1.accom.value == 'v') {
var amount = parseInt(document.form1.amount.value);
var ans = 90 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.accom.value == 't') {
var amount = parseInt(document.form1.amount.value);
var ans = 150 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.a`enter code here`ccom.value == 'c') {
var amount = parseInt(document.form1.amount.value);
var ans = 45 * amount;
document.form1.total1.value = ans;
}
}
That's all

set default checked value at total cost display without using "value"

As we can directly set the value to the value we wanted in the textbox like <input type="text" name="total" value="500" size="10" readonly />
Is there any method to display the default checked value in the text box wihout using value = "500"??
var checks = document.getElementsByName('deliveryType');
for (var i = 0; i < checks.length; i++) checks[i].onclick = function() {
var cal = document.getElementsByName('deliveryType');
var total = 0;
for (var i = 0; i < cal.length; i++) {
if (cal[i].checked) {
total += parseFloat(cal[i].getAttribute("data-price"));
}
}
document.getElementsByName("total")[0].value = "$" + total.toFixed(2);
}
<form id= selectEvent>
<section id="collection">
<p>
Home - £500.00 <input type="radio" name="deliveryType" value="home" data-price="500.00" checked /> |
self collect - no charge <input type="radio" name="deliveryType" value="ticketOffice" data-price="0" />
</p>
</section>
<section id="checkCost">
<h2>Total cost</h2>
Total <input type="text" name="total" size="10" readonly />
</section>
</form>
Try the following code:
var checks = document.getElementsByName('deliveryType');
checks.forEach(function(value){
if(value.checked){
document.getElementsByName("total")[0].value = "$" + value.getAttribute('data-price');
}
})
for (var i = 0; i < checks.length; i++) checks[i].onclick = function() {
var cal = document.getElementsByName('deliveryType');
var total = 0;
for (var i = 0; i < cal.length; i++) {
if (cal[i].checked) {
total += parseFloat(cal[i].getAttribute("data-price"));
}
}
document.getElementsByName("total")[0].value = "$" + total.toFixed(2);
}
<form id= selectEvent>
<section id="collection">
<p>
Home - £500.00 <input type="radio" name="deliveryType" value="home" data-price="500.00" checked /> |
self collect - no charge <input type="radio" name="deliveryType" value="ticketOffice" data-price="0" />
</p>
</section>
<section id="checkCost">
<h2>Total cost</h2>
Total <input type="text" name="total" size="10" readonly />
</section>
</form>

Change value of input box based on selected item and other value

So basically, I am creating an application form for gym membership.
The base cost is $100. If juggling is selected, the cost will increase by $50.
Also, the base cost will increase by $50 if the 'BMI' is > 25 and <= 30. If the 'BMI' is > 30, it will increase by $100 instead.
This is my code. It is not working as intended. Would like some help. Thanks a lot.
<!DOCTYPE html>
<html>
<head>
<title>UWS application form</title>
<link rel="stylesheet" href="Prac1Task2.css" />
</head>
<body>
<form>
<fieldset>
<legend>Fitness Details</legend>
Favourite Activities: <br/>
<input type="checkbox" name="activity" value="cycling" id="cycling"><label for="cycling">Cycling</label>
<input type="checkbox" name="activity" value="50" id="juggling" onchange="update(this);"><label for="juggling">Juggling</label>
<br/>
<br/>
<label for="height">What is your height (Meters)</label><br/>
<input type="number" name="height" id="height" class="input" onchange="getBMI()">
<br/>
<label for="weight">What is your weight? (kg)</label><br/>
<input type="number" name="weight" id="weight" class="input" onchange="getBMI()">
<br/>
<label for="bmi">BMI:</label><br/>
<input type="number" name="bmi" id="bmi" class="input" value="" readonly>
<script>
function getBMI()
{
var height = document.getElementById("height").value;
var weight = document.getElementById("weight").value;
document.getElementById("bmi").value = (weight / height) / height;
var bmi = document.getElementById("bmi");
var price = document.getElementById("price").value;
if (bmi.value > 25 && bmi.value <= 30)
{
parseInt(price.value) += parseInt(50);
document.getElementById('price').value = price.value;
}
else if (bmi.value > 30)
{
document.getElementById("price").value = document.getElementById("price").value + 100;
}
}
</script>
</fieldset>
<br/>
<fieldset>
<legend>Application Details</legend>
Date of Application:<br/>
<input class="input" id="date" name="date" readonly />
<script>
var timetime = new Date();
document.getElementById("date").value = (timetime.getDate() + "/" + (timetime.getMonth() + 1)
+ "/" + timetime.getFullYear());
</script>
<br/><br/>
Cost of Application: <br/>
$<input type="number" class="input" id="price" name="price" step="0.01" value="100" readonly />
<script>
var total = 100;
function update(feature) {
if(feature.checked == true){
total += parseInt(feature.value);
document.getElementById('price').value = total;
}
if(feature.checked == false){
total -= parseInt(feature.value);
document.getElementById('price').value = total;
}
}
</script>
</fieldset>
<br/>
<input type="submit" value="Submit" class="button">
</form>
</body>
</html>
You haven't mentioned the exact issue which you are facing. However, I think there should be some problem with this line of code.
parseInt(price.value) += parseInt(50);
parseInt() is a function and you cannot assign values to it.
It should be some thing like this
price.value = parseInt(price.value) + parseInt(50);
Also price.value is not a proper reference because you are assigning document.getElementById("price").value; to it. So you should be using price instead of price.value

How to check to make sure a radio button is selected

I have a form that I need to figure out the code on how to make sure a radio button is selected
Here is the form
<body>
<div id="content">
<p>Enter the values below and click "Calculate".</p>
<label for="length">Length:</label>
<input type="text" id="length" /><br />
<label for="width">Width:</label>
<input type="text" id="width" /><br />
<label for="answer">Answer:</label>
<input type="text" id="Answer" disabled="disabled" /><br />
<input type="radio" name="Area" value="Area" check="checked"/>Area<br />
<input type="radio" name="Parimeter" value="Parimeter" />Parimeter<br />
<label> </label>
<input type="button" id="calculate" value="Calculate" /><br />
</div>
</body>
</html>
here is the code
var $ = function (id) {
return document.getElementById(id);
}
var calculate_click = function () {
var length = parseFloat( $("length").value );
var width = parseFloat( $("width").value );
// $("area").value = "";
if (isNaN(length) || length <= 0) {
alert("Length must be a valid number\nand greater than zero.");
} else if(isNaN(width) || width <= 0) {
alert("Width must be a valid number\nand greater than zero.");
}
} else {
var area = width * length;
var perimeter = 2 * width + 2 * length;
$("area").value = area.toFixed(2);
$("perimeter").value = perimeter.toFixed(2);
}
}
window.onload = function () {
$("calculate").onclick = calculate_click;
$("length").focus();
}
Here are some links that may help you finish your homework:
http://www.w3schools.com/html/html_forms.asp
http://www.w3schools.com/jquery/default.asp
http://jsfiddle.net

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