JQuery :: How To Bind Form Field OnChange
Dec 4, 2010
I have a form where I need to populate a field with a math equation using inputs in the form. Here's the example:
fieldA fieldB fieldC ... fieldJ
fieldX
As the user inputs a number in fieldA, I need fieldX to immediately change and display the average of fieldA - fieldJ if the field is not empty (valid entry for all field's is a number between 20 - 80). I don't have the ability to make many changes in the form because I'm using a product called Gravity Forms for Wordpress.
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Sep 16, 2009
Have an asp.net form where the textboxes have had the onblur attribute added. Though VS2008 still barks it's an invalid attribute...However, my problem is primarily w/the txtFICODate field.When testing using 10/10/2009 in this field, the code displays the appropriate msg based on format param. However, on exiting the isValidDate function in debug mode, I see that the code does not stop at the txtFICODate html but moves to the txtDOBB isValidDate function. Here the param is MM/DD/YYYY and it loops back into the function but now displays a different format message.Previous code (ValidateFICODate(obj)) below also caused the same looping error.
Debugging the same code with the txtDOBB field (10/10/56), I see it enter the function, display the appropriate message and exit. However, in debug, the code comes back to the function and then selects the field contents.how to fix problem so code stops at the txtFICODate field .Using xp Pro SP3, visual studio 2008 (c#).in the process of writing this, I searched other post here related to onblur + loop. So changed the event to onchange...and while the looping does not now occur, the focus just moves to the next field.
On page load code(if (!isPostBack)):
txtFICODate.Attributes.Add("onblur", "isValidDate(this, 'MM/DD/YY');");
txtDOBB.Attributes.Add("onblur", "isValidDate(this, 'MM/DD/YYYY');");
[code]....
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Aug 7, 2009
I want to create a javascript function where I have a dropdown list and onChage I want to update a txt field with the current date in the dd/mm/yyyy format.
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Oct 5, 2010
I use unordered list item (<ul>) to replace select type <select> (select) in my form. I have problem on bind the value after submit the form. Because <ul> is not a form element. May i know how should I overcome it?
What i intend to do is similar effect as google contact book: 1. User click ADD button, then <ul> and <textbox> will be appended into the form. 2. After form submitted, user can see what are the value he has entered earlier. I can bind the textbox, post the unorder list item with hidden element. but i have no clue how to bind the unordered list item..
Kindly refer to my code as below. It is working except cannot bind unordered list item... p/s: I am using PHP + JQuery.
<?php
print "<pre>";
print_r($_GET);
print_r($_POST);
[Code].....
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Mar 16, 2010
I have a text field on my page, whose value I am setting through the jQuery cal
$('#Expandable').val("fefefe");
However, when I normally type into the text field, certain events occur as the text field value changes. These events do not occur when I set the value like above. So my question is, after I set the value, how do I invoke any onChange handlers?
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Nov 4, 2010
is there a way in jQuery to bind variables to function calls similar as prototype.js does it? See [URL]
E.g. in the slideUp method of jQuery you can specify a callback that is called after the effect has finished. I would like to bind a variable to this call so that it is used inside of this callback as a closure.
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Nov 12, 2011
i think this will help people a lot, cuz i couldn't find any simple answer by googling 3 hours...i need a very very simple jquery form field reset.here is the picture what i need:
HTML Code:
<script type='text/javascript' src='http://code.jquery.com/jquery-1.6.4.min.js'></script>
<script>
[code]....
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May 20, 2011
I have a website which uses several forms to input data, each form contains fields for the user to complete and at the end of the each form the user has the option to proceed or go back.The problem is, on form1 there is a drop down box which determines the content of subsequent forms but when a user partially completes form2 but then goes back to form1 and changes the drop down box selection, the onchange function reloads the subsequent forms but it does not clear the previous form2 values so an error is generated because those inputs are not required with the change made to the drop down box. I have tried setting the ids to zero using getelementbyid on form1 but it does not seem to work presumably because the ids are on form2 not form1?
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Jul 23, 2005
I have a web form with several fields. If I copy & paste from a RTF document into a field, the javascript validation and field length are bypassed and cause the form to fail.
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Jun 15, 2005
<SELECT NAME="subcategory" class="small" onchange="this.blur();">
doesn't remove focus from the drop-down field?
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Mar 2, 2011
I have a form that is basically a table from my database.I have checkboxes on the left and only those checked get updated on submit.I�m trying to make an function that is called with an onChange event that will check the box if any of the fields in that row are altered. The id of the checkbox is checkeds[i] where �i� is the row number.The function is firing, but the box isn�t getting checked.
Code:
function checkBox(row)
{
[code].....
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Sep 14, 2007
In my program, I have GMap logic that outputs location information to
a disabled input field (was previously a label). Then, when a
user clicks on a link (to start a new map), I want to save the location
data to an array prior to server processing. So, onchange, save the
input field's value to array[last_click]. But, because this field is
hidden (or readonly) I am not sure how to go about this.
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Aug 4, 2010
I have a multiple fields on my page and wish to have a reusable javascript to update the previous box with the selction made.how would this be done
<form name="form1" method="post" action="">
<p>
<input type="textone" name="textfieldone" id="textfieldone">
[code]....
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Apr 26, 2007
I want to add an event to a generated SELECT field. It's an onChange call to a function named calculateSubtotal(). The result I want would look like <select name="..." id="..." onChange="calculateSubtotal()">.
This is what I've got so far. The drop menu is created with no error, but no onChange either. Code:
var newTour = document.createElement('SELECT');
newTour.name = 'registour' + rowCount;
newTour.id = 'registour' + rowCount;
var newAttrib = document.createTextNode('onChange="calculateSubtotal()"');
addOption(newTour, '');
addOption(newTour, 'Tour 1');
addOption(newTour, 'Tour 2');
addOption(newTour, 'Tour 3');
document.getElementById('groupreg').appendChild(newTour);
document.getElementById(newTour.id).appendChild(newAttrib);
I also tried this, it doesn't work either:
newTour.onchange = 'calculateSubtotal()'
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Jul 23, 2005
I have a requirement in which, I need to capture a loan amount and the amount of down payment for that loan. According to the requirement, the user is going to enter enter the loan amount and then will enter the down payment in either percentage of the loan amount or an actual amount. I have designed a form to capture this information with three text fields, one each for loan amount, down payment in % and down payment in $.
So the user has the option of entering downpayment in $ or in %. If the user enter the down payment in $ then my code has to calculate the equivalent % value and populate the corresponding text field and vice versa. My question here is, what would be the best way to handle this
situation.
Shall i just use the OnChange event of the text field to handle this scenario? If I do that wont I be running into a loop?
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Dec 13, 2010
I have some fields on my form that are auto-populating with a difference from 2 input fields using onChange, easy stuff. The correct value is stored in the DB, to 3 decimal places (correct, since data type is a float with 3 decimals).The challenge I am having is to get the number that is auto-displaying on the form to format to 3 decimals. For example, when I enter the first number at 44.8, and a second number of 44.666, the onChange command displays '0.13400000000000034'. This is saved in the db correctly as, '0.134' and once the form is submitted the correct value of 0.134 displays since it is pulling directly from the db. I would like to format the onChange display with the toFixed command so the extra decimals don't show onChange.
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Aug 18, 2009
I have tested this on jQuery 1.2.6 and 1.3.2... After binding a form.submit event and returning false due to some logic, the second time the form is submitted, the event never executes and false is automatically used by the browser. Is this a browser bug vs a jQuery bug?
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Feb 28, 2010
I am trying to create an anonymous function for onchange event of file field, so that when a file is selected, the covering text field gets that value. I know how to accomplish this by adding onchange="", but I'd prefer not do that. The code that I have almost works, except that the function in the for loop can't call on the "i" variable that the loop uses.
for( i = 0; i < source.length; i++) {
source[i].onchange = function() {
name[i].value = this.value;
}
}
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Feb 25, 2011
does anyone know a simple way to focus on a different text field after the user enters data in the first text field?
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Jun 3, 2011
I've have a function to take the value entered in a form text box, add 50 to it and put the result in another text box.
When I enter 650.5 I get 700.5 exactly how I'd expect. But when I enter -650.5 instead of getting -600.5 I get -650.050 as though it is failing to parse the float due to it being negative. My understanding of parseFloat was that it recognises negative numbers. Is there a nice simple way to get this to work?
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Dec 29, 2004
<form> onchange event doesnt work in IE. but works in Mozilla. Is there any other alternative in IE for <form onchange>????
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Jan 2, 2002
I'm trying to design a bracket for our office to use for the NCAA tournament this March. I'll have drop down menus for the user to choose the winner of each game and I'd like for the drop downs to change dynamically, based on what has previously been selected. Ideally, this code below will change the third drop down menu to contain the values of the first and second fields. Code:
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Feb 3, 2009
The following form validation script works, currently if one of the five fields are completed, a message appears the remaining field(s) must be completed etc. Although the information the user has inputted in the first field is cleared. How can this information be available, if there is one problem in the form it doesn't make sense that the user must re-input all the information again. I look forward to hearing your response,
function validate_form ( )
{
valid = true;
[code]....
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Jul 23, 2005
I have seen this technique on a couple websites, but haven't been
clear on how it's done. What I am looking for is to have a form with
x-options. The technique is that when the first option is selected it
auto updates the other options to correspond. For example if I was
looking for specific cities in a state. Once a state is selected I am
only given specific cities. The end result is to combine this with
php and mysql, but I am sure if I understand the javascript aspect I
can run with it.
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Feb 4, 2009
How can I get and pass the value of an HTML form select object to a javascript function? code...
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Jan 6, 2011
I would like to use some event handling on a form, not something I have done before and looking for some assistance. Here is my code:
<select name="LocO">
<option value=""></option>
<option value="O">Outside</option>
[code]....
So what I need to happen, is based on the selection of the first selection box, some of the options of the other selection boxes should not be available.If Outside is selected, everything in LocA should be available, but only up to 4 in Loc1... and if Inside is selected, only up to E should be available in LocA and everything should be available in Loc1.
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