Simple Error Handling For Form - Avoid Alert Boxes?
Jul 21, 2011
I was trying to create JavaScript error handling for a form, and I was trying to get an error message to show up underneath the field where there was an error. (I am trying to avoid alert boxes.) I only have two fields, and my problem is that only one field is showing an error message. If I place an error in the input for the second field, the error shows up under the first field. How can I get the error messages to show up under the correct form field?
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL]">
<html xmlns="[URL]">
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />
<title>Carrots</title>
<style>
.qty {
width: 25px;
text-align: right;
}.blank {
display: none;
} .....
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Feb 26, 2006
I am trying to fix error- object does not exist- I want it possible to
allow object not to exist.
I am writing a script on a page that may or may not include a login
form. For example-after a visitor logs in, the login form is no longer
on the page, but other content is still there.
I want to bring focus to the login form using the onLoad in the body
tag.....but if the login form does not exist, I do not want to perform
this function.
The following code works fine for focusing the cursor on to the login
form.
(code)
<html>
<head>
<title>
Testing Javascript
</title>
<script type="text/javascript">
<!--
function addcursor ()
{
if (document.login) {
document.login.username.focus();
}
}
//-->
</script>
</head>
<body OnLoad ="addcursor()">
<form name="login" id="login" action="" method="post">
<input type = "text" name="username" id="username" />
<input type="password" name="password" />
</form>
</body>
</html>
(end code)
But if you remove the form in the body section from the code, an error "object does not exist or is null" results.
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Apr 8, 2009
The following is a simple form with text boxes..Used java script to check for nulls but how to check my phone number for only integer values ie numbers
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Oct 25, 2011
Im working on a backend panel where i populate a simple table with a few text boxes in there so they can update some values. I also have at the end of every row in the table an Edit, Delete & Save button. When i hit the save button i would like to update that entry in the database.
My Problem is that i need a value from the table before hitting a submit button, and the element names are dynamically created meaning ill likely need a variable sent from php to javascript and once i have the value in javascript ill need to send it back over to the php to manipulate and send to the server.
From wat i can gather using 'document.form.element.value' is the best way to go, hence why i posted this in javascript when most of my code is php.
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Feb 27, 2009
I hav find an paypal donate form like this: [URL]. The error massage will show when form is empty. Can that effect used in contact form ???
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Dec 13, 2007
I am trying to code a reusable error handling function for my JavaScript objects. I thought is would be possible to display the name of the function. So this way, when an error occurs, I can display the error along with the name of the function the error occurred in. Is it possible to display the name of the function from within the function?
These examples do not work but I did try them.
<html>
<head>
<script language="JavaScript">
function display()
{
alert( this.toString() );
alert( this.name );
alert( this );
}
</script>
</head>
<body>
<a href="javascript: display();">Display</a>
</body>
</html>
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Sep 17, 2009
I'm not an expert with javascript nor am I too familiar with the syntax. What I'm trying to do is store all errors into an array like so:
Code JavaScript:
var errors = new Array();
var example = '';
if (example == '') {
errors[] = 'This example field is empty';
}
What I'm trying to do at the end is display the array if its not empty into a DIV called errors (or something). I know how to do this in PHP but I'm trying to do first validation layer through javascript. So something like this:
Code JavaScript:
<div class="errors">
if (errors != '') {//If the array is not empty
for (keyvar in errors) {
document.write(array[keyvar]);//Display Errors
}
}
</div>
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Jul 20, 2005
I need help finding where an error is occuring in my code. I use a
try-catch block like this in my global.asa:
} catch (e) {
Application('errormsg') = ("An exception occurred in the script. Error
name: " + e.name
+ ". Error description: " + e.description
+ ". Error number: " + e.number
+ ". Error message: " + e.message); }
And this is what is SOMETIMES returned when I display
Application('errormsg'), the rest of the time, it works:
An exception occurred in the script. Error name: Error. Error description:
Path not found. Error number: -2146828212. Error message: Path not found
But I don't know which path is not found! (I'm using the filesystem object
and importing data from a file into SQL.) Is there a way to display the
line number of the error or more details? Or do I just have to try to catch
the error by going through each bit of code?
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Mar 21, 2010
Is there any way to pop up more than one alert boxes at a time?I tried it using a loop but they appear one after another, not at a time.
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Oct 6, 2010
I'm trying to have a user input a number in a prompt box which gets totaled and displayed in an alert box.This is what I have and its not working out for me.
<html>
<body>
<script>
[code]....
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Feb 14, 2003
I thought up this script when I was working on a website that acted as a cell phone. I did take a little coding outta brothercakes frogger script. If you dont want me to have this up here, just let me know. But here it is:
function alert(msg)
{
alObj=document.createElement("div");
document.body.appendChild(alObj);
alData='<table cellpadding="0" cellspacing="0" border="0" style="width:25%;height:10%;position:absolute;left:355;top:180;z-index:1;"><tr><td align="center" valign="middle">'
alData+='<table cellpadding="0" cellspacing="12" border="0" style="-moz-box-sizing:border-box;font:15px comic sans ms,arial;color:#1d4fa8;font-weight:bold;background-color:#f4f887;border:1px solid #1d4fa8;width:250px;filter:progid:DXImageTransform.Microsoft.Shadow(color=#1d4fa8,direction=135,stre ngth=5);">'
alData+='<tr>'
alData+='<td align="center">'+msg+'</td>'
alData+='</tr>'
alData+='<tr>'
alData+='<td align="center"><input type="button" onClick="clal()" value="Ok" style="border:1px inset #1d4fa8;background:#f4f887;color:#1d4fa8;font-weight:bold;height:20;">'
alData+='</tr>'
alData+='</table>'
alData+='</td></tr></table>'
alObj.innerHTML = alData;
}
function clal()
{
document.body.removeChild(alObj);
alObj=null;
}
You can edit it however you want to.
To get it working, all you have to do is create a link or something like this:
<a href="javascript:alert('Hello! How are you?')">Greetings</a>
and the alert will come up as any other kind!
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Apr 12, 2011
I was just wondering if you can use html tags in javascript alert boxes?(like <b>hello</b>) when i try it it doesn't work only in document.write it works, i feel its weird. Could it be my browser im on safari,
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Apr 28, 2009
Just started getting into jQuery yesterday. Question: How can I place line breaks in alert box text?
[code]...
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Aug 16, 2003
What I have is a link 'What is this?' and I want, when clicked upon, for an alert box to popup. I should be able to specify the text contained in the alert box, and for there to just be one button, an 'OK' button. I'm sure this is quite easy, I'm guessing it's something to do with onclick= but I'm not sure about these things. Please could someone point me in the right direction as to what I could do here?
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Nov 22, 2011
If the value is equal to 0 it will give an alert and return false. Then if you change the value of the drop down it won't let you submit.
<script type="text/javascript">
<!--
function validate_form ( )
{
[code]....
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Mar 22, 2010
I spent 2 hours trying everything, but I still can't get it to work.
<html>
<head>
<title>Hi</title>
<script type="javascript">
var outcome1 = form.YesNo.value
if (outcome1 == no) {
var formResult = no
}
else {
[code]....
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May 31, 2010
Pressing the enter key of the following page (created by JSP) submit page more than once.
Both alert popup boxes appear as expected:
However, then this alert appear again, which is unexpected:
But alert('alarmgroup ' + alarmgroup + ' rowsPerPage ' + rowsPerPage); do not appear.
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May 24, 2010
In Salesforce, I am adding what they call an "S-Control" via HTML/JavaScript that will display an alert if certain field criteria are met. The alert would be a reminder to hit the "Submit for Approval" button if the Quote Estimate is equal to or greater than $50,000. For testing purposes I added another criteria, that the Opportunity name must = Test and Stage must = Proposal/Price Quote.
Here's what I've come up with so far, taking from other examples, but I receive no alert
<html>
<head>
<script type="text/javascript" language="javascript" src="/js/functions.js"></script>
[Code]....
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Feb 10, 2010
When using the code below the alert returns a value of null. In the past this has never happened, it has always returned the xml file I'm requesting. I have noticed a strange difference between browsers. This script is used to fill a form automatically. In its current state it works perfectly in opera, but does not work in firefox or IE (used to work in all the browsers). I'm by no means a javascript expert, am I missing something here?
[Code]...
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Sep 28, 2011
The actual plugin is much more complex, but I can't even get this simple alert to show...
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Jun 30, 2009
Why won't this work?
Nothing pops up for the alert.
<script type="text/javascript">
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Mar 5, 2010
why I am getting Nan
<script type="text/javascript">
var num1;
var num2;
var num3;
[Code]....
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Jan 27, 2006
Sorry this will be an ignorant question I know, but I'm just trying to implement some quick JS in my form to check if the fields were filled in:
function check_form() {
if (survey.form_firstname.value == "") {
firstname_error = "-Please enter your first name
";
}
if (survey.form_lastname.value == "") {
lastname_error = "-Please enter your last name
";
}
if (survey.form_phone.value == "") {
phone_error = "-Please enter your phone number
";
}
if (survey.form_email.value == "") {
email_error = "-Please enter your email
";
}
if (!survey.form_agree.checked) {
agree_error = "-You must be over 18 and provide accurate information
";
}
errors = firstname_error + lastname_error + phone_error + email_error + agree_error;
if(!errors) {
return true;
} else {
alert("There were errors:
" + errors);
delete firstname_error;
delete lastname_error;
delete phone_error;
delete email_error;
delete agree_error;
delete errors;
return false;
}
}
It only seems to work if no values are filled in, if one of the fields is filled in the error checking fails. Again, I'm extremely new to JS, i've only ever copy/pasted and this is the first time i've tried writing a piece.
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May 21, 2010
I'm getting a runtime error on the code in red. These functions are called by an onBlur by the way.
<script type="text/javascript">
//THIS GENERATES QUANTITY OF MATERIALS
function generate3()
[code]....
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Mar 18, 2009
I'm trying to create a "Books I'm Reading" widget using the Readernaut API. I'm using JSON with a callback. This is a portion of what the JSON URL returns:
Code JavaScript:
parseResponse(
{
"version": "1.0", [code]...
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Dec 27, 2009
I am new to Javascript. I copied this script from the web, but I get an error at this line:parent.removeChild(child);The error says "Invalid argument".
<div id="parent" align=center>
<form name=mainfrm method=post>
<script language="JavaScript">
[code]....
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