Unexpected behavior manipulating dynamic user input table

Unexpected behavior manipulating dynamic user input table - javascript

I am trying to remove checked row from dynamic user input table , but it never works. Here is the code
function addRow(tableID){
var table=document.getElementById(tableID);
var rowCount=table.rows.length;
if(rowCount<5){
var row=table.insertRow(rowCount);
var colCount=table.rows[0].cells.length;
for(var i=0; i<colCount; i++){
var newcell=row.insertCell(i);
newcell.innerHTML=table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum number of extra data is 5.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) {
alert("Cannot remove all.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}
<p>
<input type="button" value="Add Option" onClick="addRow('dataTable')"/>
<input type="button" value="Remove Option" onClick="deleteRow('dataTable')"/>
<table id="dataTable" >
<tbody>
<tr>
<p>
<td>
<input type="checkbox" required="required" name="chk[]" checked="checked" />
</td>
<td>
<label>Name of Data:</label>
<input type="text" name="dataName">
</td>
<td>
<label>Data:</label>
<input type="text" name="data">
</td>
</p>
</tr>
</tbody>
</table>
The add function works fine, but delete function doesn't work. Could someone tell me what happened?

You almost done.
There are a few issues:
You have a blank space after <td> and before <input>. So, your <input> becomes as the second child:
<td>
<input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
It should be:
<td><input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
Otherwise, you can change childNodes[0] to childNodes[1].
Also, why do you have <p> before and after <td>? remove them.
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if (rowCount < 5) {
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for (var i = 0; i < colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
}
} else {
alert("Maximum number of extra data is 5.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for (var i = 0; i < rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if (null != chkbox && true == chkbox.checked) {
if (rowCount <= 1) {
alert("Cannot remove all.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}
<input type="button" value="Add Option" onClick="addRow('dataTable')" />
<input type="button" value="Remove Option" onClick="deleteRow('dataTable')" />
<table id="dataTable">
<tbody>
<tr>
<td><input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
<td>
<label>Name of Data:</label>
<input type="text" name="dataName"> </td>
<td>
<label>Data:</label>
<input type="text" name="data"> </td>
</tr>
</tbody>
</table>

These are good answers, but better yet is to replace .childNodes[0] with .children[0] because you are only interested in elements, that way you don't have to worry about spaces and other sneaky stuff like that. You can read about it here : What is the difference between children and childNodes in JavaScript?

Made a change from
var chkbox = row.cells[0].childNodes[0];
to
var chkbox = row.cells[0].childNodes[1];
It is working now.
function addRow(tableID){
var table=document.getElementById(tableID);
var rowCount=table.rows.length;
if(rowCount<5){
var row=table.insertRow(rowCount);
var colCount=table.rows[0].cells.length;
for(var i=0; i<colCount; i++){
var newcell=row.insertCell(i);
newcell.innerHTML=table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum number of extra data is 5.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[1];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) {
alert("Cannot remove all.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}
<p>
<input type="button" value="Add Option" onClick="addRow('dataTable')"/>
<input type="button" value="Remove Option" onClick="deleteRow('dataTable')"/>
<table id="dataTable" >
<tbody>
<tr>
<p>
<td>
<input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
<td>
<label>Name of Data:</label>
<input type="text" name="dataName">
</td>
<td>
<label>Data:</label>
<input type="text" name="data">
</td>
</p>
</tr>
</tbody>
</table>

Related

To pass id and name through javascript

The output shown on image
Hi am not much expertise in javascript, In my code I have Add-Items & Delete-Items button which is working fine.First row works fine for total calculation function but rest of rows not working because of that Am not able to assign different names and ids for created row. How I can reuse javascript. Also please let me know how to receive data on submit using POST method or this code and how to find total amount of all rows I inserted at the bottom of table.
Thanks in Advance
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="css/default.css"/>
<script type="text/javascript" src="add_rows.js"></script>
<script>
function func()
{
var w = document.getElementById("qty").value;
var x = document.getElementById("price").value;
var z = document.getElementById("total");
z.value = Number(w)*Number(x);
}
</script>
</head>
<body>
<fieldset class="row2">
<legend>Catering Order Details</legend>
<p>
<input type="button" value="Add Items" onClick="addRow('dataTable')" />
<input type="button" value="Remove Items" onClick="deleteRow('dataTable')" />
</p>
<table id="dataTable" class="form" border="1">
<tbody>
<tr>
<p>
<td><input type="checkbox" required="required" name="chk[]" /></td>
<td>
<label>Item</label>
<select size="1" name="Item[]" required="required" >
<?php
echo "<option value=''>---Choose Item---</option>";
$q=mysqli_query($dbConnect1,"SELECT DISTINCT ITEM as Item, ITEM_ID FROM `manage_item`");
while($r=mysqli_fetch_assoc($q))
{
$i=$r['ITEM_ID'];
$n=$r['Item'];
echo "<option value='$i'> $n</option>";
}
?>
</select>
</td>
<td>
<label>Quantity</label>
<input type="text" required="required" name="Qty[]" id="qty" value="">
</td>
<td>
<label>Price/Quantity</label>
<input type="text" required="required" name="Price[]" id="price" value="" onChange="func()">
</td>
<td>
<label>Total</label>
<input type="text" required="required" name="Total[]" id="total" value="">
</td>
</p>
</tr>
</tbody>
</table>
<div class="clear"></div>
</fieldset>
</div>
</body>
</html>
Here's my script
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if(rowCount < 100){
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum items is 100.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) {
alert("Cannot Remove all the Items.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}

Instead to use IDs you may change them to class names like in:
<input type="text" required="required" name="Qty[]" class="qty" value="" oninput="func(this)">
Because you are using inline events you can:
use input event because the DOM input event is fired synchronously when the value of an <input>, <select>, or <textarea> element is changed.
this as parameter to the inline function: it will be the current element
Hence, change your func to:
function func(ele) {
var parentRow = ele.parentNode.parentNode;
var w = parentRow.querySelector('input.qty').value;
var x = parentRow.querySelector('input.price').value;
var z = parentRow.querySelector('input.total');
z.value = Number(w)*Number(x);
}
The this parameter now is the ele, current element. You can now get the parent row and using the classes and querySelector you can find all elements.
The snippet:
function updateGrandTotal() {
var gt = document.querySelector('input.grantotal');
gt.value = 0;
document.querySelectorAll('input.total').forEach(function(ele, idx) {
gt.value = +gt.value + +ele.value;
});
}
function func(ele) {
var parentRow = ele.parentNode.parentNode;
var w = parentRow.querySelector('input.qty').value;
var x = parentRow.querySelector('input.price').value;
var z = parentRow.querySelector('input.total');
z.value = Number(w)*Number(x);
updateGrandTotal();
}
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length -1;
if(rowCount < 100){
var row = table.insertRow(rowCount + 1);
var colCount = table.rows[1].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[1].cells[i].innerHTML;
}
}else{
alert("Maximum items is 100.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) {
alert("Cannot Remove all the Items.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
updateGrandTotal();
}
<fieldset class="row2">
<legend>Catering Order Details</legend>
<p>
<input type="button" value="Add Items" onClick="addRow('dataTable')" />
<input type="button" value="Remove Items" onClick="deleteRow('dataTable')" />
</p>
<table id="dataTable" class="form" border="1">
<thead>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td>
<label>Grand Total</label>
<input type="text" required="required" name="Total[]" class="grantotal" value=""></td>
</tr>
</thead>
<tbody>
<tr>
<p>
<td><input type="checkbox" required="required" name="chk[]" /></td>
<td>
<label>Item</label>
<select size="1" name="Item[]" required="required" >
<option value=''>---Choose Item---</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</td>
<td>
<label>Quantity</label>
<input type="text" required="required" name="Qty[]" class="qty" value="" oninput="func(this)">
</td>
<td>
<label>Price/Quantity</label>
<input type="text" required="required" name="Price[]" class="price" value="" oninput="func(this)">
</td>
<td>
<label>Total</label>
<input type="text" required="required" name="Total[]" class="total" value="">
</td>
</p>
</tr>
</tbody>
</table>
<div class="clear"></div>
</fieldset>

javascript fields calculation of multiple fields

I am using this code this is html form where i need the javascript onblur calculation of qty * rate = amount
<div>
<p>
<input type="button" value="Add Product" onClick="addRow('dataTable')" />
<input type="button" value="Remove Product" onClick="deleteRow('dataTable')" />
</p>
<table style="width: 100%;" id="dataTable" class="responstable" border="1">
<tbody>
<tr>
<p>
<td><input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
<td><input type="text" name="prod" maxlength="100" placeholder="Product *" required></td>
<td>
<input type="number" name="qty[]]" maxlength="10" placeholder="QUANTITY *" required>
</td>
<td>
<input type="number" step="0.01" name="rate[]" maxlength="10" placeholder="RATE *" required>
</td>
<td>
<input type="number" step="0.01" name="amt[]" placeholder="AMOUNT *" required>
</td>
</p>
</tr>
</tbody>
</table>
</div>
And this is Javascript code i am using for add input fields
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if(rowCount < 25){ // limit the user from creating fields more than your limits
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum Limit is 25.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) { // limit the user from removing all the fields
alert("Cannot Remove all the Products.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}
I need also auto calculation of total amount.
I know it is done by using input field id but here the problem is i don't know how to add different input field ID when i click add product here the same id comes on next input field so what is the best solution for this.

Try this fiddle for dynamic added elements jsfiddle.net/bharatsing/yv9op3ck/2/
HTML:
<div>
<p>
<input type="button" value="Add Product" id="btnAddProduct" />
<input type="button" value="Remove Product" id="btnRemoveProduct" />
<label>Total Amount:</label><label id="lblTotal">0</label>
</p>
<table style="width: 100%;" id="dataTable" class="responstable" border="1">
<tbody>
<tr>
<p>
<td><input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
<td><input type="text" name="prod" maxlength="100" placeholder="Product *" required></td>
<td>
<input type="number" name="qty[]" maxlength="10" placeholder="QUANTITY *" required>
</td>
<td>
<input type="number" step="0.01" name="rate[]" maxlength="10" placeholder="RATE *" required>
</td>
<td>
<input type="number" step="0.01" name="amt[]" placeholder="AMOUNT *" required>
</td>
</p>
</tr>
</tbody>
</table>
</div>
Javascript/jQuery:
$("#btnAddProduct").click(function(){
addRow('dataTable');
});
$("#btnRemoveProduct").click(function(){
deleteRow('dataTable');
});
function CalculateAll(){
$('input[name="rate[]"]').each(function(){
CalculateAmount(this);
});
var total=0;
$('input[name="amt[]"]').each(function(){
total+= parseFloat($(this).val());
});
$("#lblTotal").html(total);
}
$(document).on("blur",'input[name="qty[]"]',function(){
CalculateAmount(this);
});
$(document).on("blur",'input[name="rate[]"]',function(){
CalculateAmount(this);
});
var totalAll=0;
function CalculateAmount(ctl){
var tr=$(ctl).parents("tr:eq(0)");
var qty=parseFloat($(tr).find('input[name="qty[]"]').val());
var rate=parseFloat($(tr).find('input[name="rate[]"]').val());
var amount=qty*rate;
$(tr).find('input[name="amt[]"]').val(amount);
if(!isNaN(amount)){
totalAll= totalAll + amount;
$("#lblTotal").html(totalAll);
}
}
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if(rowCount < 25){ // limit the user from creating fields more than your limits
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum Limit is 25.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) { // limit the user from removing all the fields
alert("Cannot Remove all the Products.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
CalculateAll();
}

Since in your code you are only using JavaScript. Here is an attempt with JavaScript. You need not to have ID attribute only to calculate the total amount , you can give your amount element a class amount and use it to get sum on all the elements having this class.
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if(rowCount < 25){ // limit the user from creating fields more than your limits
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
}
}else{
alert("Maximum Limit is 25.");
}
}
function deleteRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) { // limit the user from removing all the fields
alert("Cannot Remove all the Products.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}
function amount(event)
{
var rate =parseInt(event.target.value, 10);
var qty = parseInt(event.target.parentElement.previousElementSibling.querySelector("input").value, 10);
event.target.parentElement.nextElementSibling.querySelector("input").value = rate * qty;
}
function calculate()
{
var total = 0;
document.querySelectorAll(".amount").forEach(function(elem)
{
total = total + parseInt(elem.value,10);
});
alert(total);
}
<div>
<p>
<input type="button" value="Add Product" onClick="addRow('dataTable')" />
<input type="button" value="Remove Product"onClick="deleteRow('dataTable')" />
</p>
<table style="width: 100%;" id="dataTable" class="responstable" border="1">
<tbody>
<tr>
<p>
<td><input type="checkbox" required="required" name="chk[]" checked="checked" /></td>
<td><input type="text" name="prod" maxlength="100" placeholder="Product *" required></td>
<td>
<input type="number" name="qty[]]" maxlength="10" placeholder="QUANTITY *" required>
</td>
<td>
<input type="number" step="0.01" onBlur="amount(event)" name="rate[]" maxlength="10" placeholder="RATE *" required>
</td>
<td>
<input type="number" step="0.01" class ="amount" name="amt[]" placeholder="AMOUNT *" required>
</td>
</p>
</tr>
</tbody>
</table>
<button onClick="calculate()">Total</button>
</div>

To delete a row dynamically from a table using javascript

I need help in deleting the row one by one from the bottom of the table on clicking the delete row button.
Issue:
I have used the javascript function to delete a row from my table, instead of deleting the row one by one from the bottom it is getting deleted as a whole except the first 2 rows. I need to delete the rows from the bottom one by one except the first 2 rows when the delete button is clicked .
This is my code
<html>
<head>
<script type="text/javascript">
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[1].cells[i].innerHTML;
//alert(newcell.childNodes);
switch(newcell.childNodes[0].type) {
case "text":
newcell.childNodes[0].value = "";
break;
case "select-one":
newcell.childNodes[0].selectedIndex = 0;
break;
}
}
}
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=1; i<rowCount; i++) {
var row = table.rows[i];
if(rowCount <= 2) {
alert("Cannot delete all the rows.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
catch(e) {
alert(e);
}
}
</script>
</head>
<body>
<form>
<input type="button" value="Add Row" onclick="addRow('dataTable')" />
<input type="button" value="Delete Row" onclick="deleteRow('dataTable')" />
<br/>
<br/>
<table id="dataTable" align="center" width="350px" border="1">
<tr>
<th> Product Name</th>
<th>Quantity</th>
<th> Brand</th>
</tr>
<tr>
<td> <input type="text" name="pname"/></td>
<td><input type="text" name="qty"/></td>
<td><select name="brand"/>
<option value="select">SELECT</option>
</select>
</td>
</table>
</form>
</body>
</html>

this help you :
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowDelete = table.rows.length - 1;
if (rowDelete > 1)
table.deleteRow(rowDelete);
else
alert("Cannot delete all the rows.")
}
catch(e) {
alert(e);
}
}
final code :
<html>
<head>
<script type="text/javascript">
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[1].cells[i].innerHTML;
//alert(newcell.childNodes);
switch(newcell.childNodes[0].type) {
case "text":
newcell.childNodes[0].value = "";
break;
case "select-one":
newcell.childNodes[0].selectedIndex = 0;
break;
}
}
}
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowDelete = table.rows.length - 1;
if (rowDelete > 1)
table.deleteRow(rowDelete);
else
alert("Cannot delete all the rows.")
}
catch(e) {
alert(e);
}
}
</script>
</head>
<body>
<form>
<input type="button" value="Add Row" onclick="addRow('dataTable')" />
<input type="button" value="Delete Row" onclick="deleteRow('dataTable')" />
<br/>
<br/>
<table id="dataTable" align="center" width="350px" border="1">
<tr>
<th> Product Name</th>
<th>Quantity</th>
<th> Brand</th>
</tr>
<tr>
<td> <input type="text" name="pname" value="" /></td>
<td><input type="text" name="qty" value=""/></td>
<td><select name="brand"/>
<select>
<option value="select">SELECT</option>
</select>
</td>
</table>
</form>
</body>
</html>

Before going to the loop deleting the rows, you should check first the number of rows. or you can remove the loop since you are just deleting one row only which is the last row (rowCount-1);
Try this:
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
if (rowCount > 2){
//for(var i =1; i < 2; i++) {
// var row = table.rows[i];
table.deleteRow(rowCount-1);
//}
}
else{
alert("Cannot delete all the rows.");
}
}
catch(e) {
alert(e);
}
}

Here is the working code, you didnt break the execution after deleting a row, thats why it was deleting all the rows
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=1; i<rowCount; i++) {
var row = table.rows[i];
if(rowCount <= 2) {
alert("Cannot delete all the rows.");
break;
}
else{
table.deleteRow(i);
rowCount--;
i--;
break;
}
}
}
catch(e) {
alert(e);
}
}

See if this Helps :
$('#tbl1').on('click', 'input[type="button"]', function () {
$(this).closest('tr').remove();
})
$('p input[type="button"]').click(function () {
$('#tbl1').append('<tr><td><input type="text" class="txtBox" /></td><td><input type="button" value="X" /></td></tr>')
});
Here is something to work with an HTML Snippet
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<table id="tbl1" style="border: 1px solid blue">
<tr>
<td>
<input type="text" class="txtBox" />
</td>
<td>
<input type="button" value="X" />
</td>
</tr>
</table>
<p>
<input type="button" value="Add">
</p>

How to multiply and check the field of newly inserted row

I want to add new rows having 3 input field and check if multiplication of 2 field equals to third input field. But my problem is if I check the multiplication of first 2 input field, the result will effect second row and third row etc because they all have same id and user can add many rows.
How to check with different id or without effected. my some code are as follows:
function addRow(elem,id) {
var trElement = elem.parentElement.parentElement;
var tr = document.getElementsByTagName('tr');
tr = Array.prototype.slice.call(tr);
var a = tr.indexOf(trElement);
var b = a+1;
var table = document.getElementById('dataTable');
var j, m;
var rowCount = table.rows.length;
var row = table.insertRow(a);
var colCount = table.rows[b].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[b].cells[i].innerHTML;
}
}
<table width="100%" id="dataTable">
<tr>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
</tr>
<tr>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
</tr>
</table>
<input type="button" id="agri" value="Add Row" onclick="addRow(this,id)" />
Thanks in Advance

I hope it Help you ;
cheak result as :
function addRow(elem,id) {
var trElement = elem.parentElement.parentElement;
var tr = document.getElementsByTagName('tr');
tr = Array.prototype.slice.call(tr);
var a = tr.indexOf(trElement);
var b = a+1;
var table = document.getElementById('dataTable');
var j, m;
var rowCount = table.rows.length;
var row = table.insertRow(a);
var colCount = table.rows[b].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[b].cells[i].innerHTML;
}
}
function cheakMulti() {
r = document.getElementsByTagName('tr');
for (i = 0; i < r.length; i++)
{
if(r[i].children[2].children[0].value==r[i].children[1].children[0].value*r[i].children[0].children[0].value)
{
r[i].children[2].children[0].style.backgroundColor="green";
}
else
{
r[i].children[2].children[0].style.backgroundColor="red";
}
}
}
<table width="100%" id="dataTable">
<tr>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
</tr>
<tr>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
<td><input name="" type="text" /></td>
</tr>
</table>
<input type="button" id="agri" value="Add Row" onclick="addRow(this,id)" />
<input type="button" id="agri" value="Cheak" onclick="cheakMulti(this,id)" />

How to remove value has been exist in list table tr?

I have a sample code:
<table id="modem_list">
<tr class="input_1" name="modem">
<td>iPad 1<input type="hidden" value="1" class="output_1"></td>
</tr>
<tr class="input_2" name="modem">
<td>iPad 2<input type="hidden" value="2" class="output_2"></td>
</tr>
<tr class="input_1" name="modem">
<td>iPad 1<input type="hidden" value="1" class="output_1"></td>
</tr>
</table>
<input type="button" class="submit" onclick="update()" value="submit" />
and javascript
function update() {
var table = document.getElementById("modem_list");
var rowCount = table.rows.length;
for(var i=0; i<rowCount-1; i++) {
for(var j=i+1; j<rowCount; j++) {
if(table.rows[i] == table.rows[j]) {
rowCount--;
for(var k=j; k<rowCount; k++) {
table.rows[k] = table.rows[k+1];
table.deleteRow(k);
k--;
}
}
}
}
}
How to fix result is:
<table id="modem_list">
<tr class="input_1" name="modem">
<td>iPad 1<input type="hidden" value="1" class="output_1"></td>
</tr>
<tr class="input_2" name="modem">
<td>iPad 2<input type="hidden" value="2" class="output_2"></td>
</tr>
</table>

Assuming you want to remove the repeated tr elements based on their classes, you can try this:
function update() {
//caches a reference to which table we're working with
var table = document.getElementById("modem_list");
//gets all its rows
var trs = table.rows;
//iterates through all rows
for (var i=0; i<trs.length; i++) {
//stores possible dupes in an array
var dupes = table.getElementsByClassName(trs[i].className);
//if there are any dupes.. (more than 1 element with same class)
if (dupes.length > 1)
//removes all repeated elements except the first (index 0)
for (var j=1; j<dupes.length; j++)
dupes[j].parentNode.removeChild(dupes[j]);
}
}
JSFiddle

Develop Reference

JavaScript is the programming language of the Web.

Unexpected behavior manipulating dynamic user input table - javascript

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How to multiply and check the field of newly inserted row

How to remove value has been exist in list table tr?

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