I am trying to generate a random password (this code's running perfectly), which will be pasted to the value to the Password text box, but facing a problem while calling the javascript function.
Here is my JavaScript :
function password() {
var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
var string_length = 8;
var randomstring = '';
var table = document.getElementById('table'),
rows = table.getElementsByTagName('tr'),
i,j, cells, password;
for (var i=0; i<string_length; i++) {
var rnum = Math.floor(Math.random() * chars.length);
randomstring += chars.substring(rnum,rnum+1);
}
for (i=0,j = rows.length; i<j;++i)
{
cells = rows[i].getElementsById('td');
if(!cells.length)
{continue;
}
password = cells[j].innerText;
alert("hi "+password);
}
alert("Password is : "+randomstring);
document.f2.password.value = randomstring;
}
Here is my Table :
<table name="table" id="table" cellpadding="4" cellspacing="2" border="1" bgcolor="" >
<tr name="tr" id="tr">
<th><input type="checkbox" name="allCheck" onclick="selectallMe()"></th>
<th>Emp ID</th>
<th>Device</th>
<th>Feature Status</th>
<th>Policy</th>
<th>Password Management</th>
</tr>
<tr>
<% while(rs.next()){ %>
<td><input type="checkbox" name="chkName" onclick="selectall()"></td>
<td><input type="text" name="empId" value="<%= rs.getString(1)%> " disabled="disabled" maxlength="10"></td>
<td><input type="text" name="device" value="<%= rs.getString(2)%>" disabled="disabled" maxlength="10"></td>
<td><input type="text" name="features" value="<%= rs.getString(3)%>" disabled="disabled" maxlength="60"></td>
<td><input type="text" name="policyName" value="<%= rs.getString(4)%>" disabled="disabled" maxlength="10"></td>
<td id="td" name="td"><input type="text" name="password" id="password" value="" ><input type="button" name="Password" value="Password" onclick="password()"><input type="reset" name="Reset" value="Rseset"></td>
</tr>
<% }
%>
</table>
In my JS what is going wrong?? As I want to iterate through Password column, Password() will assign the value to the Password cells.
i would prefer to put this in a comment but i don't have the reputation to yet.
first off is there a specific reason you want the cells to be text input types? Since you are just disabling them on creation.
also look into the rows[index].cells(); and table.rows(); methods in JS. these will give you an array of the cells and rows. from there you can iterate to where you want.
visit to learn more http://www.javascriptkit.com/domref/tableproperties.shtml
hope it helps
Related
sorry for asking simple question. I am really a beginner in Javascript. I need to access my HTML array form object in my javascript, but I don't know how to do it.
The goal is to trigger the alert in javascript so the browser will display message according to the condition in javascript. Here is my code :
checkScore = function()
{
//I don't know how to access array in HTML Form, so I just pretend it like this :
var student = document.getElementByName('row[i][student]').value;
var math = document.getElementByName('row[i][math]').value;
var physics = document.getElementByName('row[i][physics]').value;
if (parseInt(math) >= 80 ) {
alert(student + " ,You are good at mathematic");
}
if (parseInt(physics) >= 80 ){
alert(student + " ,You are good at physics");
}
student_score.row[i][otherinfo].focus();
student_score.row[i][otherinfo].select();
}
<h2>HTML Forms</h2>
<form name="student_score" action="/action_page.php">
<table border=1>
<thead>
<td>Student</td>
<td>Math Score</td>
<td>Physics Score</td>
<td>Other info</td>
</thead>
<tbody>
<tr>
<td><input type="text" name="row[1][student]"></td>
<td><input type="number" name="row[1][math]" onblur="checkScore()" min="0" max="100"></td>
<td><input type="number" name="row[1][physics]" onblur="checkScore()" min="0" max="100"></td>
<td><input type="text" name="row[1][otherinfo]"></td>
</tr>
<tr>
<td><input type="text" name="row[2][student]"></td>
<td><input type="number" name="row[2][math]" onblur="checkScore()" min="0" max="100"></td>
<td><input type="number" name="row[2][physics]" onblur="checkScore()" min="0" max="100"></td>
<td><input type="text" name="row[2][otherinfo]"></td>
</tr>
<tr>
<td>
<input type="submit" value="Submit">
</td>
</tr>
</tbody>
</table>
</form>
<p>If you click the "Submit" button, it will save the data.</p>
We are going to leverage few things here to streamline this.
The first is Event Listeners, this removes all javascript from your HTML. It also keeps it more dynamic and easier to refactor if the table ends up having rows added to it via javascript.
Next is parentNode, which we use to find the tr that enclosed the element that was clicked;
Then we use querySelectorAll with an attribute selector to get our target fields from the tr above.
/*This does the work*/
function checkScore(event) {
//Get the element that triggered the blur
var element = event.target;
//Get our ancestor row (the parent of the parent);
var row = element.parentNode.parentNode;
//Use an attribute selector to get our infor from the row
var student = row.querySelector("[name*='[student]']").value;
var math = row.querySelector("[name*='[math]']").value;
var physics = row.querySelector("[name*='[physics]']").value;
var otherField = row.querySelector("[name*='[otherinfo]']");
if (parseInt(math, 10) >= 80) {
alert(student + " ,You are good at mathematic");
}
if (parseInt(physics, 10) >= 80) {
alert(student + " ,You are good at physics");
}
otherField.focus();
otherField.select();
}
/*Wire Up the event listener*/
var targetElements = document.querySelectorAll("input[name*='math'], input[name*='physics']");
for (var i = 0; i < targetElements.length; i++) {
targetElements[i].addEventListener("blur", checkScore);
}
<h2>HTML Forms</h2>
<form name="student_score" action="/action_page.php">
<table border=1>
<thead>
<tr>
<td>Student</td>
<td>Math Score</td>
<td>Physics Score</td>
<td>Other info</td>
</tr>
</thead>
<tbody>
<tr>
<td><input type="text" name="row[1][student]" class='student'></td>
<td><input type="number" name="row[1][math]" min="0" max="100"></td>
<td><input type="number" name="row[1][physics]" min="0" max="100"></td>
<td><input type="text" name="row[1][otherinfo]"></td>
</tr>
<tr>
<td><input type="text" name="row1[2][student]"></td>
<td><input type="number" name="row[2][math]" min="0" max="100"></td>
<td><input type="number" name="row[2][physics]" min="0" max="100"></td>
<td><input type="text" name="row[2][otherinfo]"></td>
</tr>
<tr>
<td>
<input type="submit" value="Submit">
</td>
</tr>
</tbody>
</table>
</form>
Well, it follows your line of code exactly as it is (because you said you do not want to change the code too much).
<h2>HTML Forms</h2>
<form name="student_score" action="/action_page.php">
<table border=1>
<thead>
<td>Student</td>
<td>Math Score</td>
<td>Physics Score</td>
<td>Other info</td>
</thead>
<tbody>
<tr>
<td><input type="text" name="row[1][student]"></td>
<td><input type="number" name="row[1][math]" onblur="checkScore(this)" min="0" max="100"></td>
<td><input type="number" name="row[1][physics]" onblur="checkScore(this)" min="0" max="100"></td>
<td><input type="text" name="row[1][otherinfo]"></td>
</tr>
<tr>
<td><input type="text" name="row1[2][student]"></td>
<td><input type="number" name="row[2][math]" onblur="checkScore(this)" min="0" max="100"></td>
<td><input type="number" name="row[2][physics]" onblur="checkScore(this)" min="0" max="100"></td>
<td><input type="text" name="row[2][otherinfo]"></td>
</tr>
<tr>
<td>
<input type="submit" value="Submit">
</td>
</tr>
</tbody>
</table>
</form>
JavaScript [Edited again using part of the #Jon P code, the query selector is realy more dynamic, and the value of the "other" field you requested is commented out]
//pass element to function, in html, only add [this] in parenteses
checkScore = function (element) {
//Get our ancestor row (the parent of the parent);
var row = element.parentNode.parentNode;
//Use an attribute selector to get our infor from the row
var student = row.querySelector("[name*='[student]']").value;
var math = row.querySelector("[name*='[math]']").value;
var physics = row.querySelector("[name*='[physics]']").value;
var other = row.querySelector("[name*='[otherinfo]']");
if (parseInt(math) >= 80) {
//other.value = student + " ,You are good at mathematic";
alert(student + " ,You are good at mathematic");
}
if (parseInt(physics) >= 80) {
//other.value = student + " ,You are good at physics";
alert(student + " ,You are good at physics");
}
otherField.focus();
otherField.select();
}
Tested :), and sorry about my english!
Try that, haven't tested it
var form = document.getElementsByName("student_score")[0];
var students = form.getElementsByTagName("tr");
for(var i = 0; i < students.length; i++){
var student = students[i].childnodes[0].value;
var math = students[i].childnodes[1].value;
var physics = students[i].childnodes[2].value;
if (parseInt(math) >= 80 ) {
alert(student + " ,You are good at mathematic");
}
if (parseInt(physics) >= 80 ){
alert(student + " ,You are good at physics");
}
}
I have table which have available quantity value of a readonly and a quantity entered by a user. I check if the available quantity is more than what the user entered. If value entered by user is more than available quantity I tell the user to enter value less than available quantity. The first entered quantity value gets validated correctly. I get problem when the user enter second quantity. How can I tackle this? I use availableQuantity and quantity as my id's
Here is my code HTML
<div id="makeOrders">
<table id="myDatatable" class="display datatable">
<thead>
<tr>
<th>Part No</th>
<th>Description</th>
<th>Model No</th>
<th>Available QTY</th>
<th>Tick To Order</th>
<th>Quantity</th>
<!-- <th>Edit</th> -->
</tr>
</thead>
<tbody>
<!-- Iterating over the list sent from Controller -->
<c:forEach var="list" items="${compatibility}">
<tr>
<td>${list.partNumber}</td>
<td>${list.itemDescription}</td>
<td>${list.compitableDevice}</td>
<td><input type="number" id="avaliableQuantity"
name="avaliableQuantity" class="form-control" readonly="readonly"
value="${list.quantity}"></td>
<td><input type="checkbox" class="form-group"
id="checkedOrder" name="selectedItem"
value="${list.partNumber},${list.compitableDevice},${list.itemDescription}"></td>
<td><input type="number" id="quantity" name="quantity"
class="form-control" onblur="compareQuantity()" value="" /></td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
This my JavaScript code
<script type="text/javascript">
/*Compare available quantity with entered quantity*/
function compareQuantity() {
var ourAvaliableQuantity = document.getElementById("avaliableQuantity").value;
var yourQuantity = document.getElementById("quantity").value;
if ( ourAvaliableQuantity > yourQuantity ) {
alert("Your quantity (" +yourQuantity+ ") is less or equal to available quantity (" + ourAvaliableQuantity+ ") order.\n You can now place your order");
console.log("True,",yourQuantity + " is less than " + ourAvaliableQuantity);
console.log("Place an Order");
}else if(ourAvaliableQuantity < yourQuantity) {
alert("Your order quantity (" +yourQuantity+ ") can not be greater than available quantity (" + ourAvaliableQuantity+ "). \n Please enter less quantity");
document.getElementById("quantity").value = "";
console.log("False,",ourAvaliableQuantity + " is small than " + yourQuantity);
console.log("You can not place an order, enter less quantity");
console.log("Enter value between 1 till " +ourAvaliableQuantity+ " not more than " +ourAvaliableQuantity);
}
}
</script>
The id attribute specifies a unique id for an HTML element, it must must be unique within the HTML document. try use the id concatenating an unique value from the 'list' variable. Or pass the '${list.quantity}' to the function.
<c:forEach var="list" items="${compatibility}">
<tr>
<td>${list.partNumber}</td>
<td>${list.itemDescription}</td>
<td>${list.compitableDevice}</td>
<td><input type="text" id="${list.partNumber}_avaliableQuantity"
name="avaliableQuantity" class="form-control" readonly="readonly"
value="${list.quantity}"></td>
<td><input type="checkbox" class="form-group"
id="checkedOrder" name="selectedItem"
value="${list.partNumber},${list.compitableDevice},${list.itemDescription}"></td>
<td><input type="text" id="${list.partNumber}_quantity" name="quantity"
class="form-control" onblur="compareQuantity(this, ${list.quantity})" value="" /></td>
</tr>
</c:forEach>
And in your javascript
function compareQuantity(element, availableQuantity) {
if (availableQuantity >= element.value){
....
You may only have one ID per page. Develop a name scheme such that you don't have two or more id="availableQuantity" or id="quantity" on the page. For instance:
<tr>
<td>${list.partNumber}</td>
<td>${list.itemDescription}</td>
<td>${list.compitableDevice}</td>
<td><input type="text" id="avaliableQuantity-1" name="avaliableQuantity" class="form-control" readonly="readonly" value="${list.quantity}"></td>
<td><input type="checkbox" class="form-group" id="checkedOrder" name="selectedItem" value="${list.partNumber},${list.compitableDevice},${list.itemDescription}"></td>
<td><input type="text" id="quantity-1" name="quantity" class="form-control" onblur="compareQuantity()" value="" /></td>
</tr>
<tr>
<td>${list.partNumber}</td>
<td>${list.itemDescription}</td>
<td>${list.compitableDevice}</td>
<td><input type="text" id="avaliableQuantity-2" name="avaliableQuantity" class="form-control" readonly="readonly" value="${list.quantity}"></td>
<td><input type="checkbox" class="form-group" id="checkedOrder" name="selectedItem" value="${list.partNumber},${list.compitableDevice},${list.itemDescription}"></td>
<td><input type="text" id="quantity-2" name="quantity" class="form-control" onblur="compareQuantity()" value="" /></td>
</tr>
1) A document should only have one element with each ID, so maybe you want to use classes or data- attributes to find the available quantity. For example, you could add 'data-available-quantity' on the element, and then you can just check this with this.dataset.availableQuantity.
2) You don't need to look up the element because you can just pass it when onBlur is called, like
<input type="text" onblur="checkQuantity(this)" data-available-quantity="25" name="quantity" ...
and then your function looks like
function checkQuantity(element) {
if (parseInt(element.dataset.availableQuantity) < parseInt(element.value()))
// this is where you add a message
(edit: added parseInt to make sure they're all integers)
There is form which has table containing 1 row and 4 column.The add row button creates a exact row but with different ids .I want to obtain the data filled in this form and send to a php script when clicked on save and continue later button at the bottom .How can I do this?This being a html page.
<form name="myform">
<h3 align="left"><b>Computer</b><h3>
<table id="POITable" border="1" width="100%">
<tr>
<th style="width:10%">Sr No.</th>
<th>Item Description</th>
<th>Quantity</th>
<th>Rate(Inclusive of Taxes)</th>
<th>Total Cost</th>
</tr>
<tr>
<td>1</td>
<td><textarea rows="4" cols="50" id="comp_item"></textarea></td>
<td><input size=25 type="number" id="comp_quant"/></td>
<td><input size=25 type="number" id="comp_rate"/></td>
<td><input size=25 type="number" id="comp_total"/></td>
</tr>
</table>
Total:<input type="text" name="computer" align="right"><br>
<input type="button" id="addmorePOIbutton" value="Add New Row" onclick="insRow()"/>
<script>
function insRow()
{
console.log( 'hi');
var x=document.getElementById('POITable');
var new_row = x.rows[1].cloneNode(true);
var len = x.rows.length;
new_row.cells[0].innerHTML = len;
var inp1 = new_row.cells[1].getElementsByTagName('textarea')[0];
inp1.id += len;
inp1.value = '';
var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
inp2.id += len;
inp2.value = '';
var inp3 = new_row.cells[3].getElementsByTagName('input')[0];
inp3.id += len;
inp3.value = '';
var inp4 = new_row.cells[4].getElementsByTagName('input')[0];
inp4.id += len;
inp4.value = '';
x.appendChild( new_row );
document.getElementsByName("len")[0].value=len;
}
</script>
<input type="submit" value="SAVE AND CONTINUE LATER">
</form>
</html>
To retrive your data in php you must add name attributes to your form input-fields. I have rewritten your code by replacing the input-id's with name instead, like so:
<td><textarea rows="4" cols="50" name="comp_item"></textarea></td>
<td><input size=25 type="number" name="comp_quant"/></td>
<td><input size=25 type="number" name="comp_rate"/></td>
<td><input size=25 type="number" name="comp_total"/></td>
also in your form-element you must specify action and method.
<form name="myform" action="myphpformhandler.php" method="POST">
I took the liberty to rewrite some of your code but the essentials are intact.
<form name="myform" action="myphpformhandler.php" method="POST"> <!-- point action towards the php-file where you wish to handle your data -->
<h3 align="left"><b>Computer</b><h3>
<table id="POITable" border="1" width="100%">
<tr>
<th style="width:10%">Sr No.</th>
<th>Item Description</th>
<th>Quantity</th>
<th>Rate(Inclusive of Taxes)</th>
<th>Total Cost</th>
</tr>
<tr>
<td>1</td>
<td><textarea rows="4" cols="50" name="comp_item"></textarea></td>
<td><input size=25 type="number" name="comp_quant"/></td>
<td><input size=25 type="number" name="comp_rate"/></td>
<td><input size=25 type="number" name="comp_total"/></td>
</tr>
</table>
Total:<input type="text" name="computer" align="right"><br>
<input type="button" id="addmorePOIbutton" value="Add New Row"/>
<input type="submit" value="SAVE AND CONTINUE LATER">
</form>
<script>
(function() { // Prevent vars from leaking to the global scope
var formTable = document.getElementById('POITable');
var newRowBtn = document.getElementById('addmorePOIbutton');
newRowBtn.addEventListener('click', insRow, false); //added eventlistener insetad of inline onclick-attribute.
function insRow() {
var new_row = formTable.rows[1].cloneNode(true),
numTableRows = formTable.rows.length;
// Set the row number in the first cell of the row
new_row.cells[0].innerHTML = numTableRows;
var inp1 = new_row.cells[1].getElementsByTagName('textarea')[0];
inp1.name += numTableRows;
inp1.value = '';
var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
inp2.name += numTableRows;
inp2.value = '';
var inp3 = new_row.cells[3].getElementsByTagName('input')[0];
inp3.name += numTableRows;
inp3.value = '';
var inp4 = new_row.cells[4].getElementsByTagName('input')[0];
inp4.name += numTableRows;
inp4.value = '';
// Append the new row to the table
formTable.appendChild( new_row );
document.getElementsByName("len")[0].value = numTableRows;
}
})();
</script>
Now to access your data in your "myphpformhandler.php" you use the $_POST-variable with your html-element names. like so!
$_POST['comp_item'];
$_POST['comp_item1'];
$_POST['comp_quant'];
$_POST['comp_quant1']; //etc...
I am currently working on javascript. In this code I have a table and a textbox. When I enter data in the textbox it should show the particular value that I typed but it doesn't search any data from the table. How do I search data in the table?
Here's a jsfiddle http://jsfiddle.net/SuRWn/
HTML:
<table name="tablecheck" class="Data" id="results" >
<thead>
<tr>
<th> </th>
<th> </th>
<th><center> <b>COURSE CODE</b></center></th>
<th><center>COURSE NAME</center></th>
</tr>
</thead>
<tbody>
<tr id="rowUpdate" class="TableHeaderFooter">
<td >
<center> <input type="text" name="input" value="course" ></center>
<center> <input type="text" name="input" value="course1" ></center>
<center> <input type="text" name="input" value="course2" ></center>
</td>
<td>
<center> <input type="text" name="input" value="subject" ></center>
<center> <input type="text" name="input" value="subject1" ></center>
<center> <input type="text" name="input" value="subject2" ></center>
</td>
</tr>
</tbody>
</table >
<form action="#" method="get" onSubmit="return false;">
<label for="q">Search Here:</label><input type="text" size="30" name="q" id="q" value="" onKeyUp="doSearch();" />
</form>
Javascript:
<script type="text/javascript">
//<!--
function doSearch() {
var q = document.getElementById("q");
var v = q.value.toLowerCase();
var rows = document.getElementsByTagName("tr");
var on = 0;
for ( var i = 0; i < rows.length; i++ ) {
var fullname = rows[i].getElementsByTagName("td");
fullname = fullname[0].innerHTML.toLowerCase();
if ( fullname ) {
if ( v.length == 0 || (v.length < 3 && fullname.indexOf(v) == 0) || (v.length >= 3 && fullname.indexOf(v) > -1 ) ) {
rows[i].style.display = "";
on++;
} else {
rows[i].style.display = "none";
}
}
}
}
//-->
</script>
checking with chrome console, it seems that innerHtml for the 'fullname' is returning an error:
var fullname = rows[i].getElementsByTagName("td");
fullname = fullname[0].innerHTML.toLowerCase();
That's because the first tr tag you have is in the thead and it doesn't have any td at all. Changing the start of your loop to 1 will fix that:
for ( var i = 1; i < rows.length; i++ ) { //... and so on
yuvi is correct in his answer. I've incorporated this in a fiddle - http://jsfiddle.net/dBs7d/8/ - that also contains the following changes:
Inputs with course and subject grouped into individual rows.
td tags align underneath th tags.
Code refactored to improve readability.
Instead of checking the html of the td tags I've changed it to check the value attribute of the input tags. This means you can change the value of the input and still search.
I also changed the style alteration to use backgroundColor. This can easily be reverted to display.
See this link.
HTML:
<table name="tablecheck" class="Data" id="results" >
<thead>
<tr>
<th>Course</th>
<th>Subject</th>
<th>COURSE CODE</th>
<th>COURSE NAME</th>
</tr>
</thead>
<tbody>
<tr>
<td><input type="text" value="course" /></td>
<td><input type="text" value="subject" /></td>
</tr>
<tr>
<td><input type="text" value="course1" /></td>
<td><input type="text" value="subject1" /></td>
</tr>
<tr>
<td><input type="text" value="course2" /></td>
<td><input type="text" value="subject2" /></td>
</tr>
</tbody>
</table>
Search here (with jQuery):<input type="text" size="30" value="" onKeyUp="doSearchJQ(this);" /><br />
Search here:<input type="text" size="30" value="" onKeyUp="doSearch(this);" />
Javascript:
function doSearchJQ(input) {
var value = $(input).val();
if (value.length > 0) {
$("#results tbody tr").css("display", "none");
$('#results input[value^="' + value + '"]').parent().parent().css("display", "table-row");
} else {
$("#results tbody tr").css("display", "table-row");
}
}
function doSearch(input){
var value = input.value;
var table = document.getElementById('results');
var tbody = table.querySelector("tbody");
var rows = tbody.querySelectorAll("tr");
var visible, row, tds, j, td, input;
for (var i = 0; i < rows.length; i++) {
visible = false;
row = rows[i];
tds = row.querySelectorAll("td");
for (j = 0; j < tds.length; j++) {
td = tds[j];
input = td.querySelector("input");
console.log(input.value.indexOf(value));
if (input.value.indexOf(value) > -1) {
visible = true;
break;
}
}
if (visible) {
row.style.display = "table-row";
} else {
row.style.display = "none";
}
}
}
With jquery it's more compact function. But you can use clear javascript doSearch.
Why don't you use JQuery DataTables? The plugin has a really nice table view as well as automatically enabled search textbox, and should fit in easily with your JavaScript/PHP solution.
See example table below:
The plugin is well-documented, and widely used. It should be very easy to drop in into an existing application, and style it accordingly.
Hope this helps!
Basically my HTML looks like this:
<form method="post" name="htmlform" onsubmit = "checkFields()">
<table style="width: 479px;" border="30" cellspacing="3" cellpadding="10">
<tbody>
<tr>
<td valign="top"><span id="firstNameSpan" >First Name *</span></td>
<td valign="top"><input type="text" name="first_name" id="first_name"
size="30" maxlength="50" /></td>
</tr>
<tr>
<td valign="top"><span id = "lastNameSpan" >Last Name *</span></td>
<td valign="top"><input type="text" name="last_name" size="30" maxlength="50"/>
/td>
</tr>
<tr>
<td style="text-align: center;" colspan="2"><input type="radio" name="sex"
value="male" /> Male <input type="radio" name="sex"
value="female" /> Female</td>
</tr>
<tr>
<td style="text-align: center;" colspan="2"><input type="submit" value="submit"
/></td>
</tr>
</tbody>
</table>
</form>
When the form is submitted, the onsubmit() event checks if first_name textfield is blank, if it is then the label or span to its left is appended to output "first name*" + " you must enter a first name" and similarly for last name and sex.
The problem is that the text in the table does not update with appendchild. When I enclosed the statement in an alert for debugging the message is appended then disappears.
The JavaScript code is below for the onsubmit = "checkFields()".
function checkFields() {
var firstName = document.getElementById("first_name").value;
var lastName = document.getElementById("last_name").value;
if (firstName == "") {
//<span style='color:red'> Please enter a first name </span>
var nameHint = " Please enter a first name";
var node = document.getElementById("firstNameSpan");
//alert(node.appendChild(document.createTextNode(nameHint)) );
//not working
node.appendChild(document.createTextNode(nameHint));
} if (lastName == "") {
//additional code
}
}
Thanks in advance, your help is much appreciated. Also are there any JavaScript debuggers?
Regards
David D
I believe your sample code is not working due to incorrect html. document.getElementById("last_name") will return undefined.
http://jsfiddle.net/5E6my/1/
Thanks all, Im getting the ropes of JFiddle the split screen is very useful although the error messages are not useful for debugging. Here is the completed code (1) HTML (2) JavaScript.
<form method="post" name="htmlform" onsubmit="return checkFields();">
<table style="width: 479px;" border="30" cellspacing="3" cellpadding="10">
<tbody>
<tr>
<td valign="top"><span id="firstNameSpan" >First Name *</span></td>
<td valign="top"><input type="text" name="first_name" id="first_name"
size="30" maxlength="50" /></td>
</tr>
<tr>
<td valign="top"><span id = "lastNameSpan" >Last Name *</span></td>
<td valign="top"><input type="text" name="last_name" id="last_name" size="30"
maxlength="50" /></td>
</tr>
<tr>
<td style="text-align: center;" colspan="2" id = "sexMessage">
Please select Male or Female*</td>
</tr>
<tr>
<td style="text-align: center;" colspan="2"><input type="radio"
name="sex" value="male" /> Male <input type="radio" name="sex"
value="female" /> Female</td>
</tr>
<tr>
<td style="text-align: center;" colspan="2"><input type="submit" value="submit"
/></td>
</tr>
</tbody>
</table>
</form>
The JavaScript code to react to the onsubmit button's unfilled fields in the form are: (any ways to make this code simpler??)
window.checkFields = function()
{
var firstName = document.getElementById("first_name");
var lastName = document.getElementById("last_name");
if(firstName.value == "")
{
//<span style='color:red'> Please enter a first name </span>
var nameHint = " *Please enter a first name ";
var fnNode = document.getElementById("firstNameSpan");
while(fnNode.firstChild)
{
fnNode.removeChild(fnNode.firstChild)
}
fnNode.appendChild(document.createTextNode(nameHint));
fnNode.style.color="red";
} else{
var nameHint = " First Name *";
var fnNode = document.getElementById("firstNameSpan");
while(fnNode.firstChild)
{
fnNode.removeChild(fnNode.firstChild)
}
fnNode.appendChild(document.createTextNode(nameHint));
fnNode.style.color="black";
}
if (lastName.value == "")
{
//additional code
var nameHint = " *Please enter a last name";
var lnNode = document.getElementById("lastNameSpan");
while(lnNode.firstChild)
{
lnNode.removeChild(lnNode.firstChild)
}
lnNode.appendChild(document.createTextNode(nameHint));
lnNode.style.color="red";
} else{
var nameHint = " Last Name *";
var lnNode = document.getElementById("lastNameSpan");
while(lnNode.firstChild)
{
lnNode.removeChild(lnNode.firstChild)
}
lnNode.appendChild(document.createTextNode(nameHint));
lnNode.style.color="black";
}
var radios = document.getElementsByName("sex");
var radioValue = ""
for(var i=0; i<radios.length; i++)
{
if(radios[i].checked)
{
radioValue = radios[i].value;
}
}
if(radioValue === "")
{
var sexNode = document.getElementById("sexMessage");
var nameHint = "*You did not choose a sex";
while(sexNode.firstChild)
{
sexNode.removeChild(sexNode.firstChild);
}
sexNode.appendChild(document.createTextNode(nameHint));
sexNode.style.color="red";
} else {
var sexNode = document.getElementById("sexMessage");
var nameHint = "Please select Male or Female*";
while(sexNode.firstChild)
{
sexNode.removeChild(sexNode.firstChild);
}
sexNode.appendChild(document.createTextNode(nameHint));
sexNode.style.color="black";
}
return false;
}
The trick is to use as Yury suggested was the onsubmit="return checkfields()" and then in the code block to use window.checkFields = function() { etc.
One question that I have... is JQuery a lot simpler to use, im learning JavaScript before JQuery... should I skip to JQUery instead. Also does JQuery support the AJAX framework?
Much appreciated
David