Form Validation - For Loop - IsNaN
Nov 12, 2009
I am actually learning Javascript atm as part of a course I am studying. I am wanting to do some validation for a form I have created. It doesn't validate for non-numeric characters like I want to do and it does not display the end result either.
[Code]...
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Feb 15, 2010
I have a form on my page, which I want to validate on submit. The code looks something like this:
$('#form').submit(function(){ if ($('#field1').length == 4 && $('#field2').length == 3) {
$.ajax({
url: someAjaxUrl,
dataType: 'html',
type: 'get',
success: function(html){ if (html != '') {
//show error
} else {
//submit form
}}});
} else {
//show other error
} return false;
});
Now, if I try to use
$('#form').submit();
In the else statement within the success function, the validation keeps getting triggered in an endless loop.
But if I use
document.form.submit();
- or document.getElementById('kbaFormSearch').submit(); -
The form gets submitted correctly. Is this because the anonymous callback function within the earlier defined
$('#form).submit()
gets triggered again? And if so, is there a way to get this to work without using "native JS" (not that I'm against it, but it would not make much sense to me unless there is no other way).
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Apr 3, 2006
<html>
<head>
<script type="text/javascript">
function convertHaH()
{
var mylist=Number(document.getElementById("percent"))
document.getElementById("remainder").value=100-mylist.value;
}
</script>
</head>
<body>
<form>
First percentage:
<input type="text" id="percent" onchange="convertHaH()">
<p>Remaining percent: <input type="text" id="remainder" size="20"></p>
</form>
</body>
This code works great, it will populate the second box. But I would like it to check if what was entered is a number if it isn't then an alert box shows stating they need to enter a number between 1 - 100, else it populates the second box.
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Aug 24, 2006
well i have one form, which having somewhere around 60 checkboxes and 28 textfields + 3 text areas, submit button
textfields start with name="textfield1" till "textfield28"
like
<input name="textfield1" type="text">
.........
<input name="textfield28" type="text">
now i have made one for loop to check value shouble be numeric.
my for loop
for (i=0; i<28;i++)
{
if(checknumber(document.form1.textfield[i].value)==false)
{
alert ("Please Insert Numerics only");
return false;
}}
checknumber is another function which checks for numerics.. my problem is, i m not able to increment the textfield1..28 with for loop. this for loop should work for the bunch of that 28 textfields only.. it should not take any other element in form.
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Jul 27, 2010
I'm performing some validation functions on a form I've created.For the phone number, I have 3 text boxes lined up next to one another. The first is for the country code, the second is for area code and the third is for the remainder of the phone number.I have used the following in order to detect whether the input value isNaN.
Code:
input = document.getElementById("phone1");
if (isNaN(input.value)) {
errorText += "[code]...
As I have three text boxes for the phone number, can I group them within this one statement? So, ...getElementById("phone1, phone2, phone3"); ?If not, what would you recommend?
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Sep 13, 2009
I am having difficulty with the isNaN built-in function. Here is the code that I have written, with the event handler onchange, the function does not return the desired response.
CODE:
Here is an example of the event handler code...one of three calls to this specific function...
<input type="text" name="zip_billing" size="5" maxlength="5" onchange=" return checkNumber(this.value);" />
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Oct 2, 2009
I have a form with multiple fieldsets which are visible conditionally. There are three submit buttons "Abandon", "Save" and "Save & Continue". Each button should validate specific controls of the form and submit it. I tried setting "onsubmit: false" and checking for "$('#myForm').valid ()" on click of these buttons., but that validates all controls of the form.
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Apr 1, 2011
I am trying to display validation error messages when form validation fails. Currently it does display the error messages but then disappears straight away. How can I stop the page from refreshing when validation fails? I have return false in my code when validation fails but still having same problem. Currently I have only done the validation for the full name only. The error msg is showed in:
[Code]...
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Jun 21, 2009
This is in regards to Jrn Zaefferer's plug in.How do you customize input validation so that I can remove foullanguage?So that first name or last name doesn't have "fck you" or something
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Jul 19, 2009
I'm using the Validation plugin for JQuery and was wondering if there was a function to submit the form without causing it to validate the form. I have a table with a list of radio-buttons and above that is a drop down list of states. The drop down list of states is used to filter the table rows and when the selected item changes it posts-back to the server (via $("#frm").submit()). I don't want this to cause any validation to occur. Is there another function I can call besides submit(), or some other method?
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Dec 21, 2009
I need to validate two forms containing multiple input fields but want just one error message if any of the fields are left blank, the page is required to submit the users details (registration form). Also if any of these fields are left blank i don't want to be able to go to the next page on clicking the submit button
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Feb 21, 2010
I have my website www.gebcn.com. If you view source you will see all that I have done, but more importantly my problem. I have the JS code at the top there and I am unable to W3C validate my HTML because of the JS. I am using XHTML strict and would like to stay using it.
The JS I have at the top is my form validation code. I am able to do any validating that I need with this "snippet" of code, I have shrank it from my library version just to use for this newsletter. Until now W3C validating was not important now for some reason it is and I am faced with this problem.
I am not a Javascript guy more of a HTML/CSS guy and I can manipulate JS to suit my needs.
<problem> I have tried to make this "snippet" of JS code an external file but receive multiple errors with the JS calling for the FORM NAME as it is not on the same page. The form NAME=NEWSLETTER is another problem, as W3C says I am unable to use attribute "NAME" in this location. <problem> I would like to keep the JS close to how it is now as I have a library to use this JS over and over again.
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Aug 13, 2011
Having a few problems with a form validation script. Its supposed to stop sending the form if key fields are missing, but it just sends them anyway!
Below is the code i use in the header to check for blank fields:
Code:
And now the code i use to action it:
Code:
From what i can see the fields match, it all links up correctly but still it will allow blank forms to be sent.
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Nov 2, 2011
I'm having trouble changing the font color of my labels ONLY when I stop the form from submitting due to blank fields. I'm not sure whether if just changing my CSS will achieve what I want, or am I going to have to add somethig to my if else statement, or both? I would think I would need to change CSS to :
label.onfocus {
color:red;
}
but a little confused on what else.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
[Code]...
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Sep 1, 2009
I have a working contact form with 3 of the fields requiring validation and they work well. I have added extra fields to the form (StatusClass, Project, CameFrom). These 3 fields return fine but I need to validated them. My problem is that the new fields don't show in the behaviours/validate panel even though they are within the form tag.
<script type="text/JavaScript">
<!--
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
[Code]...
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Apr 26, 2010
I currently have a form named "survey". I found here a JavaScript to validate my form.
I am having serious issues with this script, either it won't execute at all (the form doesn't work, as well as the validation) or the form submits without validating the form.
Here is the current JavaScript I am using.
In the head section
Code:
Code:
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Feb 13, 2011
I've literally tried everything. Read 26 tutorials, interchanged code, etc. My validation functions all work. My AJAX functions work (tested manually using servlet URL's). The second servlet validates the reCaptcha form that's generated on my webpage. After the form is validated, even if everything's correct, nothing happens upon clicking submit. I even have an alert pop up if with the captcha result, just for middle-layer debugging purposes.
I want to do all of my validation clientside; none serverside. However, going to be tough if I can't get my god damn form to submit. I've been puzzled by this for close to 36 hours straight. I can't see, and I'm going to get some rest and hope that there is some useful insight on my problem when I return.
[Code]...
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Sep 24, 2009
I've set up a mock registration form page so I can learn a bit about javascript's form validation. (newbie) I want to try to attempt to style the border of a form field green when the user enters the correct info into the form text field and red on all other fields if the user doesnt enter any info into them. When i test it, enter the right info into the username field, leave the others blank, and hit the submit button it styles the username field green ok but it doesnt make the next fields (password and so on) red. just for testing purposes I've put return false on everything so it displays a message when everythings ok.[code]
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May 14, 2011
I have a multistep jquery form that validates user input and then should send me an email. Problem is, right now, I can only get it to validate the first page, then it sends the email before the rest of the pages are viewed. I'm just trying to delay the submission of the form until the "submit_fourth" button is pressed. I've got $25 via paypal for the one who sticks with this one for long enough to come up with a workable solution.
Here is my code I know it's a lot, but I wasn't sure how much would be HTML code is in the second post in this thread (it was just too much to fit in one go).
[Code]...
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Jul 20, 2005
I have a dynamicly generated form (well the elements are at least) that looks something like this:
while( not end of returned records):
<input name="plan_id[]" type="checkbox" id="" value="<?=
$row_plans->planid ?>">
<input name="num_of_pockets[<?= $row_plans->planid ?>]"
type="text" id="num_of_pockets[]" value="<?=
$row_plans->num_of_pockets ?>" size="5" >
endwhile;
Basically it loops thru the table and creates a row of fields in the form that use the array identifiers '[]' so that I can loop thru them with PHP when the page is submitted.
The key for each array element is the id of the row from the database. So checkbox[] (with value "1") and cost[1] are on the same line in the form. The next line may not necessarily have cost[2] in it, it may be cost[3] or [4], depending the id from the database.
Is there some way I can loop thru these form elements in javascript?
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Jun 19, 2011
So I need a function to loop through a forms elements and if a value is matched then check that radio button. I have the function call in some other javascript but her is the jist.
The Function
function loopForm(form) {
for (var i = 0; i < form.elements.length; i++ ) {
[code]....
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Apr 29, 2010
How do I do this? I have ~200 labels on a page and want them all set to .style.fontWeight = 'normal';.
How can I cycle through them all without typing 200 lines of each label name?
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Oct 13, 2011
I have a form named "theForm". How can I loop through this form elements that have an "id" ATTRIBUTE to them and then populate my ids array?
var ids = new Array;
for(i=0; i<document.theForm.elements.length; i++)
{
IF ELEMENT HAS AN ID ATTRIBUTE POPULATE ids array
}
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Sep 3, 2009
I have created my second Form to File Web Form but basically I took my First Web Form coding (with the Java Script) and manipulated it so that it suited my needs for my 2nd Form (both are very close to being the same).For some reason, I can't get my Java Script validation to take effect. I was wondering if some one could try to pin point why it isn't functioning properly? Again it could be the most obvious thing, but please bear with me as I learn.Just for a little more clarity, I am going to list the things that I have changed to possibly make it easier to pin point:[code]
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Jul 20, 2005
I have a form with a lot's of number of Text and Hidden Fields. I just do a simple loop to get each value for each attribute. I have about more than 2000.
if i do something simple like :
for (var i=0; i<2000; i++)
aValue = i+10;
it runs well. But if i do something like
for (var i=0; i<2000; i++)
aValue = document.myForm.elements[i].value;
it gives me 100% CPU for a long time before i submit the form.
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Oct 12, 2011
I have a form named "theForm". How can I loop through this form elements that have an "id" ATTRIBUTE to them and then populate my ids array?
var ids = new Array;
for(i=0; i<document.theForm.elements.length; i++)
{
IF ELEMENT HAS AN ID ATTRIBUTE POPULATE ids array
}
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