karthikjayraj
30 Oct 2010, 01:09 PM
Hi ,
I am new to javascript and have coded an invoice page through help from some available content on web.
here is my requirement
My form contains inputs "item ,rate quantity,price" in a tabular form where one can dynamically add or delete rows.And the requirement is that
when Quantity is entered the Price should change to Price=Quantity*Rate on tab out
So I have used a Javascript onchange() and this works fine for the first displayed row. but for dynamically added rows this does not happen, I am not able change the price value for dynamically added rows.
Code is as below
direct_invoice.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<script type="text/javascript" src="js/direct_invoice_table.js">
</script>
<html>
<head>
<title>Direct Invoice</title>
</head>
<body leftmargin="0" topmargin="0">
<p align = "center" font='30'><input type="text" name="company_name" size="20" maxsize="20" />
<b> Invoice</b></p>
<table id="Client_Details">
<tr>
<th>Client Name:</th>
<td><input type="text" name="client_name" size="20" maxsize="20" /></td>
</tr>
<tr>
<th>Client Address:</th>
<td><input type="text" name="address_line1" size="20" maxsize="40" /></td>
</tr>
<tr>
<td></td>
<td><input type="text" name="address_line2" size="20" maxsize="40" /></td>
</tr>
<tr>
<th>Pin Code:</th>
<td><input type="text" name="client_pin" size="7" maxsize="7" /></td>
</tr>
<tr>
<th>City/State/Country:</th>
<td><input type="text" id="client_city" size="10" maxsize="30" /></td><td>/</td>
<td><input type="text" id="client_state" size="10" maxsize="20" /></td><td>/</td>
<td><input type="text" id="client_country" size="10" maxsize="20" /></td>
</tr>
<tr>
<th>Email Address:</th>
<td><input type="text" name="client_city" size="10" maxsize="30" /></td>
</tr>
<tr>
<th>TIN/PAN:</th>
<td><input type="text" name="tin_or_pan" size="10" maxsize="20 " /></td>
</tr>
</table>
<table align="center" width = "75%">
<tr>
<td align = "center">
<!--- very imporant to give the table an id --->
<!--- otherwise it won't know where to edit --->
<table border="1" id="mySampleTable">
<tr>
<th>Item No</th>
<th>Item Name</th>
<th>Description</th>
<th>Unit Cost</th>
<th>Quantity</th>
<th>Price</th>
<th> <font color="RED">Delete</font></th>
</tr>
<tr>
<td>1</td>
<td><input type="text" name="itemname[]" size="40" "maxsize="100"/></td>
<td><input type="text" name="description[]" size="20" " maxsize="100" /></td>
<td><input type="text" id = "unitcost[]" name="unitcost[]" size="10" maxsize="100" /></td>
<td><input type="text" id = "quantity[]" name="quantity[]" onchange="dynamic_onc();" size="4" maxsize="100" /></td>
<td><input type="text" id = "price[]" name="price[]" size="10" maxsize="100" /></td>
</tr>
</table>
<table id="totaltbl" align="right">
<tr>
<td></td>
</tr>
<tr>
<th>Vat %</th>
<td><input type="text" name="total" size="3" maxsize="3" /></td>
</tr>
<tr>
<th>Total</th>
<td><input type="text" id = "total" name="total" size="20" maxsize="100" /></td>
</tr>
</table>
</td>
</tr>
</table>
<form action="save_entry.php" name="eval_edit" method="post" format="html">
<p>
<input type="button" value="Add Row" onclick="addRow();" />
<input type="button" value="Calculate Total Amount" onclick="Totalcal();" />
<input type="button" value="Print" />
</p>
</form>
<p align = "left" font='100'> <b>Company Name: </b> <input type="text" name="company_address_line1" size="20" maxsize="20" />
</p>
<p align = "left" font='100'> <b>Company address line: </b> <input type="text" name="company_address_line2" size="20" maxsize="20" /></p>
<p align = "left" font='100'> <b>Company Location: </b><input type="text" name="company_address_location" size="20" maxsize="20" /></p>
</body>
</html>
***************
The below is the javascript function that i wrote
function addRow()
{
// grab the element, i.e. the table your editing, in this we're calling it
// 'mySampleTable' and it is reffered to in the table further down on the page
// with a unique of id of you guessed it, 'mySampleTable'
var tbl = document.getElementById('mySampleTable');
// grab how many rows are in the table
var lastRow = tbl.rows.length;
// if there's no header row in the table (there should be, code at least one
//manually!), then iteration = lastRow + 1
var iteration = lastRow;
// creates a new row
var row = tbl.insertRow(lastRow);
// left cell
// insert a cell
var cellLeft = row.insertCell(0);
// here we're just using numbering the cell, like anything else you don't
// have to use this, but i've kinda noticed users tend to like them
var textNode = document.createTextNode(iteration);
// takes what we did (create the plain text number) and appends it the cell
// we created in the row we created. NEAT!
cellLeft.appendChild(textNode);
// right cell
// another cell!
var cellRight1 = row.insertCell(1);
// creating an element this time, specifically an input
var el = document.createElement('input');
// a data type of text
el.type = 'text';
// the name of the element itemname, and because this is dynamic we also
// append the row number to it, so for example if this is the eigth row
// being created the text box will have the name of itemname8. super fantastic.
// the exact same thing with a unique id
el.id = 'itemname[]'+ iteration;
// set it to size of 40. setting sizes is good.
el.size = 40;
// same thing as earlier, append our element to our freshly and clean cell
cellRight1.appendChild(el);
var cellRight2 = row.insertCell(2);
var e2 = document.createElement('input');
e2.type = 'text';
e2.id = 'description[]' + iteration;
e2.size = 20;
e2.maxsize = 100;
cellRight2.appendChild(e2);
var cellRight3 = row.insertCell(3);
var e3 = document.createElement('input');
e3.type = 'text';
e3.id = 'unitcost[]' + iteration;
e3.size = 10;
e3.maxsize = 100;
cellRight3.appendChild(e3);
var cellRight4 = row.insertCell(4);
var e4 = document.createElement('input');
e4.type = 'text';
e4.id = 'quantity[]'+ iteration;
e4.size = 4;
e4.maxsize = 100;
cellRight4.appendChild(e4);
var cellRight5 = row.insertCell(5);
var e5 = document.createElement('input');
e5.type = 'text';
e5.id = 'price[]'+ iteration;
e5.size = 10;
e5.maxsize = 100;
cellRight5.appendChild(e5);
// var cellRight7 = row.insertCell(7);
// var e7 = document.createElement('input');
// e7.type = 'CHECKBOX';
// e7.id = 'cancel[]';
// cellRight7.appendChild(e7);
var cellRight6 = row.insertCell(6);
cellRight6.innerHTML = " <input type='button' value='Delete' size='6' onclick='removeRow(this);'/>";
e4.onclick = dynamic_onc();
}
function removeRow(src)
{
/* src refers to the input button that was clicked.
to get a reference to the containing <tr> element,
get the parent of the parent (in this case case <tr>)
*/
var oRow = src.parentElement.parentElement;
//once the row reference is obtained, delete it passing in its rowIndex
document.all("mySampleTable").deleteRow(oRow.rowIndex);
}
function countRow()
{
var Rowcount = document.getElementById('mySampleTable').rows.length;
document.eval_edit.count.value = Rowcount-1;
}
function CalculatePrice()
{
var Rowcount = document.getElementById('mySampleTable').rows.length;
document.eval_edit.count.value = Rowcount-1;
}
function onc() {
var a= document.getElementById('unitcost[]');
var b= document.getElementById('quantity[]');
var c = Math.ceil(a.value*b.value);
alert(b);
document.getElementById('price[]').value =c;
}
function dynamic_onc()
{
alert('Jay' );
e5.value =7;
}
function Totalcal() {
var a= document.getElementById('unitcost[]');
var b= document.getElementById('quantity[]');
var c = Math.ceil(a.value*b.value);
alert(b.value);
document.getElementById('price[]').value =c;
}
I am new to javascript and have coded an invoice page through help from some available content on web.
here is my requirement
My form contains inputs "item ,rate quantity,price" in a tabular form where one can dynamically add or delete rows.And the requirement is that
when Quantity is entered the Price should change to Price=Quantity*Rate on tab out
So I have used a Javascript onchange() and this works fine for the first displayed row. but for dynamically added rows this does not happen, I am not able change the price value for dynamically added rows.
Code is as below
direct_invoice.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<script type="text/javascript" src="js/direct_invoice_table.js">
</script>
<html>
<head>
<title>Direct Invoice</title>
</head>
<body leftmargin="0" topmargin="0">
<p align = "center" font='30'><input type="text" name="company_name" size="20" maxsize="20" />
<b> Invoice</b></p>
<table id="Client_Details">
<tr>
<th>Client Name:</th>
<td><input type="text" name="client_name" size="20" maxsize="20" /></td>
</tr>
<tr>
<th>Client Address:</th>
<td><input type="text" name="address_line1" size="20" maxsize="40" /></td>
</tr>
<tr>
<td></td>
<td><input type="text" name="address_line2" size="20" maxsize="40" /></td>
</tr>
<tr>
<th>Pin Code:</th>
<td><input type="text" name="client_pin" size="7" maxsize="7" /></td>
</tr>
<tr>
<th>City/State/Country:</th>
<td><input type="text" id="client_city" size="10" maxsize="30" /></td><td>/</td>
<td><input type="text" id="client_state" size="10" maxsize="20" /></td><td>/</td>
<td><input type="text" id="client_country" size="10" maxsize="20" /></td>
</tr>
<tr>
<th>Email Address:</th>
<td><input type="text" name="client_city" size="10" maxsize="30" /></td>
</tr>
<tr>
<th>TIN/PAN:</th>
<td><input type="text" name="tin_or_pan" size="10" maxsize="20 " /></td>
</tr>
</table>
<table align="center" width = "75%">
<tr>
<td align = "center">
<!--- very imporant to give the table an id --->
<!--- otherwise it won't know where to edit --->
<table border="1" id="mySampleTable">
<tr>
<th>Item No</th>
<th>Item Name</th>
<th>Description</th>
<th>Unit Cost</th>
<th>Quantity</th>
<th>Price</th>
<th> <font color="RED">Delete</font></th>
</tr>
<tr>
<td>1</td>
<td><input type="text" name="itemname[]" size="40" "maxsize="100"/></td>
<td><input type="text" name="description[]" size="20" " maxsize="100" /></td>
<td><input type="text" id = "unitcost[]" name="unitcost[]" size="10" maxsize="100" /></td>
<td><input type="text" id = "quantity[]" name="quantity[]" onchange="dynamic_onc();" size="4" maxsize="100" /></td>
<td><input type="text" id = "price[]" name="price[]" size="10" maxsize="100" /></td>
</tr>
</table>
<table id="totaltbl" align="right">
<tr>
<td></td>
</tr>
<tr>
<th>Vat %</th>
<td><input type="text" name="total" size="3" maxsize="3" /></td>
</tr>
<tr>
<th>Total</th>
<td><input type="text" id = "total" name="total" size="20" maxsize="100" /></td>
</tr>
</table>
</td>
</tr>
</table>
<form action="save_entry.php" name="eval_edit" method="post" format="html">
<p>
<input type="button" value="Add Row" onclick="addRow();" />
<input type="button" value="Calculate Total Amount" onclick="Totalcal();" />
<input type="button" value="Print" />
</p>
</form>
<p align = "left" font='100'> <b>Company Name: </b> <input type="text" name="company_address_line1" size="20" maxsize="20" />
</p>
<p align = "left" font='100'> <b>Company address line: </b> <input type="text" name="company_address_line2" size="20" maxsize="20" /></p>
<p align = "left" font='100'> <b>Company Location: </b><input type="text" name="company_address_location" size="20" maxsize="20" /></p>
</body>
</html>
***************
The below is the javascript function that i wrote
function addRow()
{
// grab the element, i.e. the table your editing, in this we're calling it
// 'mySampleTable' and it is reffered to in the table further down on the page
// with a unique of id of you guessed it, 'mySampleTable'
var tbl = document.getElementById('mySampleTable');
// grab how many rows are in the table
var lastRow = tbl.rows.length;
// if there's no header row in the table (there should be, code at least one
//manually!), then iteration = lastRow + 1
var iteration = lastRow;
// creates a new row
var row = tbl.insertRow(lastRow);
// left cell
// insert a cell
var cellLeft = row.insertCell(0);
// here we're just using numbering the cell, like anything else you don't
// have to use this, but i've kinda noticed users tend to like them
var textNode = document.createTextNode(iteration);
// takes what we did (create the plain text number) and appends it the cell
// we created in the row we created. NEAT!
cellLeft.appendChild(textNode);
// right cell
// another cell!
var cellRight1 = row.insertCell(1);
// creating an element this time, specifically an input
var el = document.createElement('input');
// a data type of text
el.type = 'text';
// the name of the element itemname, and because this is dynamic we also
// append the row number to it, so for example if this is the eigth row
// being created the text box will have the name of itemname8. super fantastic.
// the exact same thing with a unique id
el.id = 'itemname[]'+ iteration;
// set it to size of 40. setting sizes is good.
el.size = 40;
// same thing as earlier, append our element to our freshly and clean cell
cellRight1.appendChild(el);
var cellRight2 = row.insertCell(2);
var e2 = document.createElement('input');
e2.type = 'text';
e2.id = 'description[]' + iteration;
e2.size = 20;
e2.maxsize = 100;
cellRight2.appendChild(e2);
var cellRight3 = row.insertCell(3);
var e3 = document.createElement('input');
e3.type = 'text';
e3.id = 'unitcost[]' + iteration;
e3.size = 10;
e3.maxsize = 100;
cellRight3.appendChild(e3);
var cellRight4 = row.insertCell(4);
var e4 = document.createElement('input');
e4.type = 'text';
e4.id = 'quantity[]'+ iteration;
e4.size = 4;
e4.maxsize = 100;
cellRight4.appendChild(e4);
var cellRight5 = row.insertCell(5);
var e5 = document.createElement('input');
e5.type = 'text';
e5.id = 'price[]'+ iteration;
e5.size = 10;
e5.maxsize = 100;
cellRight5.appendChild(e5);
// var cellRight7 = row.insertCell(7);
// var e7 = document.createElement('input');
// e7.type = 'CHECKBOX';
// e7.id = 'cancel[]';
// cellRight7.appendChild(e7);
var cellRight6 = row.insertCell(6);
cellRight6.innerHTML = " <input type='button' value='Delete' size='6' onclick='removeRow(this);'/>";
e4.onclick = dynamic_onc();
}
function removeRow(src)
{
/* src refers to the input button that was clicked.
to get a reference to the containing <tr> element,
get the parent of the parent (in this case case <tr>)
*/
var oRow = src.parentElement.parentElement;
//once the row reference is obtained, delete it passing in its rowIndex
document.all("mySampleTable").deleteRow(oRow.rowIndex);
}
function countRow()
{
var Rowcount = document.getElementById('mySampleTable').rows.length;
document.eval_edit.count.value = Rowcount-1;
}
function CalculatePrice()
{
var Rowcount = document.getElementById('mySampleTable').rows.length;
document.eval_edit.count.value = Rowcount-1;
}
function onc() {
var a= document.getElementById('unitcost[]');
var b= document.getElementById('quantity[]');
var c = Math.ceil(a.value*b.value);
alert(b);
document.getElementById('price[]').value =c;
}
function dynamic_onc()
{
alert('Jay' );
e5.value =7;
}
function Totalcal() {
var a= document.getElementById('unitcost[]');
var b= document.getElementById('quantity[]');
var c = Math.ceil(a.value*b.value);
alert(b.value);
document.getElementById('price[]').value =c;
}