Increment and Decrement price value on Change - javascript

i'm trying to do an price counter synchronizing with increment and decrement buttons, but the price is not changing when i click one of the buttons (+/-) this is not working, how can i solve this issue? Thanks!!!
$('#plus').click(function add() {
var $qtde = $("#quantity");
var a = $qtde.val();
a++;
$("#minus").attr("disabled", !a);
$qtde.val(a);
});
$("#minus").attr("disabled", !$("#quantity").val());
$('#minus').click(function minust() {
var $qtde = $("#quantity");
var b = $qtde.val();
if (b >= 1) {
b--;
$qtde.val(b);
}
else {
$("#minus").attr("disabled", true);
}
});
/* On change */
$(document).ready(function()
{
function updatePrice()
{
var price = parseFloat($("#quantity").val());
var total = (price + 1) * 1.05;
var total = total.toFixed(2);
$("#total-price").val(total);
}
$(document).on("change, keyup, focus", "#quantity", updatePrice);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="button" value="-" id="minus" />
<input type="text" id="quantity" value="" name="quantity" />
<input type="button" value="+" id="plus" />
<br />
<input id="total-price" readonly="readonly" value=""/>

If you change your binding to update whenever there is a click on an input, you'll get the behavior that you are expecting.
$('#plus').click(function add() {
var $qtde = $("#quantity");
var a = $qtde.val();
a++;
$("#minus").attr("disabled", !a);
$qtde.val(a);
});
$("#minus").attr("disabled", !$("#quantity").val());
$('#minus').click(function minust() {
var $qtde = $("#quantity");
var b = $qtde.val();
if (b >= 1) {
b--;
$qtde.val(b);
} else {
$("#minus").attr("disabled", true);
}
});
/* On change */
$(document).ready(function() {
function updatePrice() {
var price = parseFloat($("#quantity").val());
var total = (price + 1) * 1.05;
var total = total.toFixed(2);
$("#total-price").val(total);
}
// On the click of an input, update the price
$(document).on("click", "input", updatePrice);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="button" value="-" id="minus" />
<input type="text" id="quantity" value="" name="quantity" />
<input type="button" value="+" id="plus" />
<br />
<input id="total-price" readonly="readonly" value="" />

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<link rel="stylesheet" href="">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
</head>
<body>
<div class="sp-quantity">
<div class="container" style=" font-size:14px; ">
<div class="sp-input">
<input type="text" class="quantity-input" value="1">
<div class="button" style="cursor: pointer;">
+
</div>
<div class="button" style="cursor: pointer;">
-
</div>
</div>
<p>custom filed</p>
<div class="sp-input">
<input type="text" class="quantity-input-db" value="1.8" step="1.8">
<div class="button" style="cursor: pointer;">
+
</div>
<div class="button" style="cursor: pointer;">
-
</div>
</div>
</div>
</div>
<script type="text/javascript">
// debugger;
$(document).ready(function () {
$(".button").on("click", function() {
var $db_value = $('.db_value').val();
var $quantity = $('.quantity_input').val();
var db_valu_fix = 1.8;
var $button = $(this),
$input = $button.closest('.sp-quantity').find("input.quantity-input");
var oldValue_q = $input.val();
var $db_value = $button.closest('.sp-quantity').find("input.quantity-input-db");
var oldValue_db = $db_value.val();
console.log(oldValue_db);
if ($.trim($button.text()) == "+") {
newVal = parseFloat(oldValue_q) + 1;
newdbVal = parseFloat(oldValue_db) + 1;
//newdbVal.toFixed(2);
}
else {
if (oldValue_q > 0) {
newVal = parseFloat(oldValue_q) - 1;
newdbVal = parseFloat(oldValue_db) - 1;
newdbVal = Math.round(newdbVal * 100) / 100;
} else {
newVal = 1;
}
}
$input.val(newVal);
$db_value.val(newdbVal);
});
// $(".ddd").on("click", function(step) {
// var a=$(".quantity-input").val();
// var attr=$(".quantity-input").attr(step);
// var getValue=a/1;
// console.log(attr);
// });
});
</script>
</body>
</html>

Related

More efficient way of duplicating the code

Every time I click the + button I want the same input to display
The way I do it here works fine but seems like the worst way of doing it as just repeating the same code and changing the id's (also if I want for example 5 inputs I would have to repeat this code 5 times). What would be a better way of doing this?
<html>
<head>
<script language='JavaScript' type='text/javascript'>
function show3(){
document.getElementById('div2').style.display = 'block';
}
</script>
<style>
.hide {
display: none;
}
</style>
</head>
<body>
<div>
<input type="range" min="0" max="1500" value="0" class="slider2" id="one"/>
<p>Value(mm): <input type="text" id="two" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
<script>
var slider1 = document.getElementById("one");
var output2 = document.getElementById("two");
output2.value = slider1.value;
slider1.oninput = function() {
output2.value = this.value;
}
</script>
<div id="div2" class="hide">
<input type="range" min="0" max="1500" value="0" class="slider2" id="three"/>
<p>Value(mm): <input type="text" id="four" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
<script>
var slider2 = document.getElementById("three");
var output3 = document.getElementById("four");
output2.value = slider1.value;
slider2.oninput = function() {
output3.value = this.value;
}
</script>
</body>
</html>
<html>
<head>
<script language='JavaScript' type='text/javascript'>
function show3(){
document.getElementById('div2').style.display = 'block';
}
</script>
<style>
.hide {
display: none;
}
</style>
</head>
<body>
<div>
<input type="range" min="0" max="1500" value="0" class="slider2" id="one"/>
<p>Value(mm): <input type="text" id="two" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
<script>
var slider1 = document.getElementById("one");
var output2 = document.getElementById("two");
output2.value = slider1.value;
slider1.oninput = function() {
output2.value = this.value;
}
</script>
<div id="div2" class="hide">
<input type="range" min="0" max="1500" value="0" class="slider2" id="three"/>
<p>Value(mm): <input type="text" id="four" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
<script>
var slider2 = document.getElementById("three");
var output3 = document.getElementById("four");
output2.value = slider1.value;
slider2.oninput = function() {
output3.value = this.value;
}
</script>
</body>
</html>
This will work for all the sliders. But you need to keep in mind a couple of things :
This will work only for the sliders that are already rendered in the DOM (even if they are hidden) if you render new sliders to the DOM you will need to attach the event listener as I did it in the foreach loop.
The input id (e.g "one") needs to match the output data-range="one"
function show3(){
document.getElementById('div2').style.display = 'block';
}
var sliders = document.querySelectorAll(".slider"); // slider = common class name
sliders.forEach(( slider ) => {
slider.addEventListener('input', (e) => {
const sliderId = e.target.id;
const output = document.querySelector(`[data-range=${sliderId}]`);
output.value = e.target.value;
});
});
<html>
<head>
<style>
.hide {
display: none;
}
</style>
</head>
<body>
<div>
<input type="range" min="0" max="1500" value="0" class="slider" id="one"/>
<p>Value(mm): <input type="text" data-range="one" id="two" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
<div id="div2" class="hide">
<input type="range" min="0" max="1500" value="0" class="slider" id="two"/>
<p>Value(mm): <input type="text" data-range="two" id="four" size="10" class="special" /></p>
<button onclick="show3();" type="button">+</button>
</div>
</body>
</html>
Might be easier to include the code in the element and clone it (parentNode is the div) :
<div>
<input type="range" min="0" max="1500" value="0"
oninput="this.parentNode.getElementsByTagName('INPUT')[1].value = this.value"/>
<p>Value(mm): <input type="text" size="10" /></p>
<button type="button"
onclick="this.parentNode.parentNode.append(this.parentNode.cloneNode(true))">+</button>
</div>
I would recommend you to create some kind of class which let you create slider components dynamically.
Here's a quick example (not optimized):
var SliderComponent = (function(doc) {
var defaults = {
containerSelector: 'body',
value: 0,
min: 0,
max: 1500,
inputSize: 10,
inputClass: 'special',
sliderClass: 'slider',
buttonClass: 'button'
}, options;
function SliderComponent(options) {
options = Object.assign({}, defaults, options || {});
this.container = getContainer(options);
this.input = createInput(options);
this.slider = createSlider(options);
this.removeButton = createButton(options.buttonClass, '-');
this.addButton = createButton(options.buttonClass, '+');
this.element = render.apply(this);
this.events = [];
this.events.push(
addEventListener.call(this, 'click', this.removeButton, function() {
this.destroy();
}),
addEventListener.call(this, 'click', this.addButton, function() {
new SliderComponent(options);
}),
addEventListener.call(this, 'input', this.slider, function(event) {
this.input.value = event.target.value;
}),
addEventListener.call(this, 'input', this.input, function(event) {
this.slider.value = event.target.value;
})
)
}
SliderComponent.prototype.destroy = function() {
this.events.forEach(function(e) {
e();
});
this.element.remove();
}
function addEventListener(name, element, listener) {
listener = listener.bind(this);
element.addEventListener(name, listener);
return function() {
element.removeEventListener(name, listener);
};
}
function getContainer(options) {
var container = doc.querySelector(options.containerSelector);
if(!container) {
throw new Error('Container for selector %s not found', options.containerSelector);
}
return container;
}
function createInput(options) {
var input = doc.createElement('input');
input.setAttribute('type', 'number');
input.setAttribute('min', options.min);
input.setAttribute('max', options.max);
input.setAttribute('size', options.inputSize);
input.classList.add(options.inputClass);
input.value = options.value;
return input;
}
function createSlider(options) {
var input = doc.createElement('input');
input.setAttribute('type', 'range');
input.setAttribute('min', options.min);
input.setAttribute('max', options.max);
input.classList.add(options.sliderClass);
input.value = options.value;
return input;
}
function createButton(klass, text) {
var button = doc.createElement('button');
button.setAttribute('type', 'button');
button.classList.add(klass);
button.textContent = text;
return button;
}
function render() {
var element = doc.createElement('div');
element.appendChild(this.slider);
element.appendChild(this.input);
element.appendChild(this.removeButton);
element.appendChild(this.addButton);
return this.container.appendChild(element);
}
return SliderComponent;
})(document);
var sliders = new SliderComponent();

How to find the greatest value of elements in this kind of Array?

I am looking for correct code so function named "finder()" can execute and find the highest value in Array named "sum" .
When press "Find max" button result is :"[object HTMLInputElement] "
Thank you for any help!
Here is code:
<html>
<head>
<title>Max</title>
<meta charset="utf-8">
<script type="text/javascript">
var sum = document.getElementsByName('addends');
function add() {
var x = document.getElementById('apendiks');
x.innerHTML+="<br/><input type='text' name='addends' size='7'>";
}
function finder() {
var max = sum[0];
for(i=0; i<sum.length;i++){
if(sum[i] > max){
max = sum[i];
}
}
document.getElementById('showMaxValue').innerHTML = max;
}
function gather() {
var total=0;
for(i=0; i < sum.length; i++){
total+=parseFloat(sum[i].value);
}
document.getElementById('score').innerHTML = total;
}
</script>
</head>
<body>
<p><input type="button" onclick="add()" value="Add a new box"> </p>
<p><input type="button" onclick="" value="-"> </p>
<div id="apendiks"></div>
<p><input type="button" onclick="gather()" value="Total sum"> </p>
<p>Score: <b id="score"></b></p>
<p><input type="button" onclick="finder()" value="Find max"> </p>
<p id="showMaxValue"></p>
</body>
</html>
var sum = document.getElementsByName('addends');
This line will give you a list of Nodes, not an Array.
In your finder method, you need to treat it as such
function finder()
{
var max = paeseInt(sum[0].value) ;
for(i=0; i<sum.length;i++){
if(parseInt(sum[i].value) > max && !isNaN(sum[i].value)){ //assuming that strings should be ignored
max = parseInt(sum[i].value) ;
}
}
document.getElementById('showMaxValue').innerHTML = max;
}
Use .value to get the value of input field
<html>
<head>
<title>Max</title>
<meta charset="utf-8">
<script type="text/javascript">
var sum = document.getElementsByName('addends');
function add() {
var x = document.getElementById('apendiks');
x.innerHTML+="<br/><input type='text' name='addends' size='7'>";
}
function finder() {
var max = sum[0].value;
for(i=0; i<sum.length;i++){
if(sum[i].value > max){
max = sum[i].value;
}
}
document.getElementById('showMaxValue').innerHTML = max;
}
function gather() {
var total=0;
for(i=0; i < sum.length; i++){
total+=parseFloat(sum[i].value);
}
document.getElementById('score').innerHTML = total;
}
</script>
</head>
<body>
<p><input type="button" onclick="add()" value="Add a new box"> </p>
<p><input type="button" onclick="" value="-"> </p>
<div id="apendiks"></div>
<p><input type="button" onclick="gather()" value="Total sum"> </p>
<p>Score: <b id="score"></b></p>
<p><input type="button" onclick="finder()" value="Find max"> </p>
<p id="showMaxValue"></p>
</body>
</html>

Multiplying text put value with the sum of check box values and display it on a paragraph

I'm trying to multiply the entered text input value with the sum of check box values clicked. So far when you click the check boxes the sumof their avues is displayed instantly on the span emlement with id="Totalcost"....i need some help figuring out how i could multiply the sum of check box selected with the value entered in the text input field.
If it can be easily done using JQuery i will really appreciate
Thanks in advance.
Here is my code
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script type="text/javascript">
var total = 0;
inputBox.onkeyup = function(){
document.getElementById('Totalcost').innerHTML = inputBox.value;
}
function test(item){
var inputBox = document.getElementById('chatinput');
if(item.checked){
total+= parseInt(item.value);
}else{
total-= parseInt(item.value);
}
//alert(total);
document.getElementById('Totalcost').innerHTML = total ;
}
</script>
</head>
<body>
<input type="text" id="chatinput" onchange="myFunction()"><br>
<p id="printchatbox"></p>
<div id="container">
<p id="printc"></p>
<input type="checkbox" name="channcost" value="10" onClick="test(this);" />10<br />
<input type="checkbox" name="chanlcost" value="20" onClick="test(this);" />20 <br />
<input type="checkbox" name="chancost" value="40" onClick="test(this);" />40 <br />
<input type="checkbox" name="chanlcost" value="60" onClick="test(this);" />60 <br />
</div>
Total Amount : <span id="Totalcost"> </span><BR><BR><BR>
</body>
</html>
You have many incongruences in your code.....
Replace it with this:
<!DOCTYPE HTML>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script type="text/javascript">
var total = 0;
function test(){
var checkboxes = document.getElementById('container').getElementsByTagName("input");
var box_value = parseInt(document.getElementById('chatinput').value);
var new_total = 0;
for(var i=0; i<checkboxes.length; i++){
var item = checkboxes[i];
if(item.checked){
new_total += parseInt(item.value);
}
}
if(box_value>0){ total = (new_total>0?new_total:1) * box_value; }
else{ total = new_total; }
document.getElementById('Totalcost').innerHTML = total ;
}
</script>
</head>
<body>
<input type="text" id="chatinput" onchange="test()"><br>
<p id="printchatbox"></p>
<div id="container">
<p id="printc"></p>
<input type="checkbox" name="channcost" value="10" onClick="test();" />10<br />
<input type="checkbox" name="chanlcost" value="20" onClick="test();" />20 <br />
<input type="checkbox" name="chanlcost" value="40" onClick="test();" />40 <br />
<input type="checkbox" name="chanlcost" value="60" onClick="test();" />60 <br />
</div>
Total Amount : <span id="Totalcost"> </span><BR><BR><BR>
</body>
</html>
I changed your script to make these changes
var total = 0;
function test(item){
var inputBox = document.getElementById('chatinput');
if(item.checked){
total+= parseInt(item.value);
}else{
total-= parseInt(item.value);
}
inputValue = $("#chatinput").val();
textValue = (isNaN(inputValue)) ? 1 : parseInt(inputValue);
if(textValue == "NaN"){
textValue = 1;
}
totalAfterMul = total*textValue;
console.log(totalAfterMul);
document.getElementById('Totalcost').innerHTML = totalAfterMul ;
}
It will do what is desired.
It takes the input value and then multiply it with the sum of the check boxes. If the input value is not a number then it will consider it as 1
inputValue = $("#chatinput").val();
textValue = (isNaN(inputValue)) ? 1 : parseInt(inputValue);
if(textValue == "NaN"){
textValue = 1;
}
totalAfterMul = total*textValue;

How to use multiple button for same function in javascript?

I am new in javascript. I want to create multiple button with same function and result will be shown in same place. From my code I want to change tip1 value for every button click event. How can I do this? Please help me if any one have any idea.
My codes are below:
<form id="calculator">
<p>Amount: <input id="amount" /></p>
<p>Years: <input id="year" /></p>
<hr />
<p>Tip: <input id="tip" disabled="disabled" /></p>
<p>Total: <input id="total" disabled="disabled" /></p>
<button onclick="calculate()" id="1">Button1</button>
<button onclick="calculate1()" id="2">Button2</button>
</form>
<script type="text/javascript">
function calculate () {
var amount = $('#amount').val();
var year = $('#year').val();
if (button 1) {
var tip1 = (1 + 115 / 100);
}
else if (button 2) {
var tip1 = (1 + 215 / 100);
}
var tip = Math.pow(tip1, year);
var total = amount * tip;
$('#tip').val( tip.toFixed(2) );
$('#total').val( total.toFixed(2) );
return false;
}
$('#calculator').submit( calculate );
</script>
You can do it like this:
function calculateF(target) {
var amount = parseFloat($('#amount').val());
var year = parseFloat($('#year').val());
if (target == 1) {
var tip1 = (1 + 115 / 100);
} else if (target == 2) {
var tip1 = (1 + 215 / 100);
}
var tip = Math.pow(tip1, year);
var total = amount * tip;
$('#tip').val(tip.toFixed(2));
$('#total').val(total.toFixed(2));
return false;
}
$('button').click(function(e) {
calculateF($(e.target).prop('id'));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<p>Amount: <input id="amount" /></p>
<p>Years: <input id="year" /></p>
<hr />
<p>Tip: <input id="tip" disabled="disabled" /></p>
<p>Total: <input id="total" disabled="disabled" /></p>
<button id="1">Button1</button>
<button id="2">Button2</button>
Also, by passing ID directly
function calculate (id) {
var amount = $('#amount').val();
var year = $('#year').val();
var tip1 = 0;
if (id == "1") {
tip1 = (1 + 115 / 100);
}
else if (id == "2") {
tip1 = (1 + 215 / 100);
}
var tip = Math.pow(tip1, year);
var total = amount * tip;
$('#tip').val( tip.toFixed(2) );
$('#total').val( total.toFixed(2) );
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>Amount: <input id="amount" /></p>
<p>Years: <input id="year" /></p>
<hr />
<p>Tip: <input id="tip" disabled="disabled" /></p>
<p>Total: <input id="total" disabled="disabled" /></p>
<button onclick="calculate(this.id)" id="1">Button1</button>
<button onclick="calculate(this.id)" id="2">Button2</button>
You are declaring var tip1 at wrong places.
Just Use this to call the function calculate(id).
$('button').click(function(e) {
calculate(this.id);
});
HTML
<form id="calculator">
<p>Amount: <input id="amount" /></p>
<p>Years: <input id="year" /></p>
<hr />
<p>Tip: <input id="tip" disabled="disabled" /></p>
<p>Total: <input id="total" disabled="disabled" /></p>
<button id="1">Button1</button>
<button id="2">Button2</button>
</form>
calculate() function
function calculate () {
var amount = $('#amount').val();
var year = $('#year').val();
var tip1;
if (id=="1") {
tip1 = (1 + 115 / 100);
}
else if (id=="2") {
tip1 = (1 + 215 / 100);
}
var tip = Math.pow(tip1, year);
var total = amount * tip;
$('#tip').val( tip.toFixed(2) );
$('#total').val( total.toFixed(2) );
return false;
}

how to display different function in a same textbox?

I have this html code with javascript. My average value displays correctly but my find minimum is not displaying anything. Its supposed to show when the user clicks on the find min button on the box.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculate Your Grade</title>
<link rel="stylesheet" href="calc.css">
<script>
var $ = function (id) {
return document.getElementById(id);
}
var calculateGrade = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3=parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) ) {
alert("All three entries must be numeric");
}
else {
var average = (exam1 + exam2 + exam3) / 3;
$("average").value = average;
}
}
var min = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3=parseFloat($("exam3").value);
if ( (exam1<exam2) && (exam1<exam3)){
$("mini").value=exam1;}
else if ((exam2<exam1) && (exam2<exam3)){
$("mini").value=exam2;}
else {
$("mini").value=exam3;
}
}
window.onload = function () {
$("calculate").onclick = calculateGrade;
$("mini").onclick = min;
$("exam1").focus();
}
</script>
</head>
<body>
<section>
<h1>Calculate Average</h1>
<label for="exam1">Exam1:</label>
<input type="text" id="exam1"><br>
<label for="exam2">Exam2:</label>
<input type="text" id="exam2"><br>
<label for="exam3">Exam3:</label>
<input type="text" id="exam3"><br>
<label for="average"></label>
<input type="text" id="average"disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calc Avg">
<input type="button" id="mini" value="Find min">
</section>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculate Your Grade</title>
<link rel="stylesheet" href="calc.css">
<script>
var $ = function (id) {
return document.getElementById(id);
}
var average = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3 = parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) || isNaN(exam3)) {
alert("All three entries must be numeric");
}
else {
var average = (exam1 + exam2 + exam3) / 3;
$("result").value = average;
}
}
var min = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3 = parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) || isNaN(exam3)) {
alert("All three entries must be numeric");
} else {
$("result").value = Math.min(exam1,exam2,exam3);
}
}
window.onload = function () {
$("average").onclick = average;
$("mini").onclick = min;
$("exam1").focus();
}
</script>
</head>
<body>
<section>
<h1>Calculate</h1>
<label for="exam1">Exam1:</label>
<input type="text" id="exam1"><br>
<label for="exam2">Exam2:</label>
<input type="text" id="exam2"><br>
<label for="exam3">Exam3:</label>
<input type="text" id="exam3"><br>
<label for="average"></label>
<input type="text" id="result" disabled ><br>
<label> </label>
<input type="button" id="average" value="Calc Avg">
<input type="button" id="mini" value="Find min">
</section>
</body>
</html>
The issue is with the min function. Instead of setting the value of textbox (probably, missing in your code example) you are setting the value of button "mini" (which is incorrect).
Update:
You need to be including one more textbox <input type="text" id="txtMin" disabled ><br>
and update your min function to set the value of it, as follows:
$("txtMin").value=exam1;
...
$("txtMin").value=exam2;
...
$("txtMin").value=exam3;

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