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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Using OnLoad() To Focus Login Form- Error Handling

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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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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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
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} 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
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<html>
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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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[code]...

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<html>
<head>
<script type="text/javascript" language="javascript" src="/js/functions.js"></script>

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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:


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";
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";
}

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}

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 {
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delete firstname_error;
delete lastname_error;
delete phone_error;
delete email_error;
delete agree_error;
delete errors;
return false;
}
}

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