JavaScript Increment/Decrement Form Field Value

May 10, 2006

Iv'e got a page that has a mass amount of input fields, all of which require
a decimal figure. To make it easier when it comes to inputting data, I'm
trying to setup + and - links that will increment/decrement the form field
value by 1 when clicked.

I'm using the following code, however when I click on one of the links, I
get the following error -

document.forms.tmp.input_field is null or not an object.

It's as if JavaScript is not reading the parameter being passed through the
function.

Here's the code -

<html>
<head>
<script language="JavaScript">
function increment(input_field) {
document.forms.tmp.input_field.value = document.forms.tmp.input_field.value
+ 1;
document.forms.tmp.input_field.focus();
}
function decrement(input_field) {
document.forms.tmp.input_field.value =
document.forms.tmp.input_field.value - 1;
document.forms.tmp.input_field.focus();
}
</script>
</head>
<body>
<form name="tmp">
<p><input type="text" name="temporary" id="temporary" value="0">&nbsp;
<a href="#" onClick="javascript:increment(temporary);">+</a>&nbsp;
<a href="#" onClick="javascript:decrement(temporary);">-</a></p>
</form>
</body>
</html>

Any help would be appreciated. I just can't seem to see the problem...

View 5 Replies


ADVERTISEMENT

Increment Value In Hidden Form Field?

Nov 19, 2009

I have modified a free JS function from here: [URL] To dynamically add text fields to the form. My work-in-progress version is here: [URL] On the form, I have a hidden text field:

[Code]...

View 9 Replies View Related

Copy And Paste Form RTF Document Into Field In Asp Form Cause It To Bypass Field Length And Javascript Validation - How To Overcome?

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.

View 3 Replies View Related

Javascript To Include Field On Next Form

Sep 29, 2007

I've got a short form--1 field and a submit button. I want someone to
enter their name in that field, hit submit, and have their name be in
the "name" field on the next page (which contains a form). Am I even
in the right forum?

View 2 Replies View Related

JavaScript Form Field Value Update Dilemma

Jan 7, 2007

I'm doing an ajax call to a remote php file... it returns a value fine,
and even enters a value into a text field on my form. The problem is,
right after the function call to the ajax function, I do an alert of
what the field value is, and it doesn't recognize the field value has
been changed. Two caveats:

1 - It will recognize the last call's change
(if I run it a 2nd time, it'll see the 1st call changes)
onBlur="ajaxCall(document.form1);alert(document.form1.ajax Field.value);">

2 - It'll recognize the current call's change if I set a 2 second
timeout
onBlur="ajaxCall(document.form1);setTimeout('checkFields(d ocument.form1)',2000);">

It seems, although I can see the text field getting updated,
programmatically speaking, it isn't reflecting it until everything is
done... including any alerts and such.

It's weird seeing the empty alert popup, when I can see the value in
the text field underneath it.

View 6 Replies View Related

Posting A Hidden Field To A Form In A Document Using Javascript

Jul 23, 2005

I need to add an input hidden field to an existing form (post).

I have tried a couple things like adding the '<INPUT type=hidden
name=idSelectedURL value=http://server/documents>' to the innerHTML of
the form but it fails. ie

var sField = "<INPUT type=hidden name=idSelectedURL
value=http://server/documents>";
frm.innerHTML = frm.innerHTML + sField;


also, trying to add an element to the form such as:
var frm = document.getElementById("idForm");
var oField = frm.createElement ('input');
oField.type ="hidden";
oField.name = "idSelectedURL";
oField.value ="http://server/documents";

none of these work and give me a javascript error.

I don't think the createElement method can be used from the form
object, only from the document object. still could not get it working.

View 8 Replies View Related

Jquery :: Form Field Clear \ Form Field Reset?

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]....

View 2 Replies View Related

Form Validation Field Values Not Saved If One Field Is Not Completed/invalid?

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]....

View 1 Replies View Related

Only Validating One Field At A Time In A Multi Field Form?

Aug 17, 2010

my javascript code is only validating one field at a time (as in it validates on field then submits the form, instead of going through the entire thing and then returning it as true and submitting it...) I'm not sure what to do to be honest, I've looked up google to no real avail.. my variables are declared in a seperate file to the actual even handlers and I have heaps of comments through out it, so please don't judge lol i'm still learning Quote:

//Event Registrations (Variable Declarations) found in validation_chkr.js
//Validate Entire Form using validate_join()
function validate_join()

[code]....

View 14 Replies View Related

Calculate Field Based On Another Field In Form

Jul 23, 2005

Is there a way I can calculate a field in a form based on another field in
the same form. When clicking submit, both values should be posted to the
next page. I want to be able to type in a value in one field, and
automatically in a second field the value*1,36 should appear.

View 6 Replies View Related

Copy Date From Field To Field In A Form

Feb 15, 2006

I have a site for property bookings with 2 calendars to enter start and end date. The calendar im using doesnt have any obvious facility to copy yhe date to 2 fields so each one has to be done, months in advance this can be a real pain.

Does anyone have any ideas how i can take the data inserted into one field and copy it to the second?

View 3 Replies View Related

Increment A Value Each Day By One?

Jan 29, 2010

For a real estate website, I want to create a script which will tell visitors how many days a property has been on the market. For example say the property was posted on the site on 1/1/2009. I want the site to say "This property has been on the market for 394 days." .

View 3 Replies View Related

Increment Var By 1 In Loop?

Apr 6, 2009

I have a loop that is running and I am trying to increment a number by one each time. Here is what I am doing, but each time it just writes out 1 for the value.

var i=1;
Start of Loop
document.write(i);
var i=i++;
End of loop

It just writes out 1 each time though.

View 4 Replies View Related

Increment By 1 Every 15 Seconds?

Sep 11, 2010

I need to develop this feature for a charity site displays a number that counts up 1 every 15 seconds. This is to show how many times a kid is abused in this country.

I figured this piece of code was a good start:

function doSomething() {
setTimeout('doSomething()',15000);
}

View 2 Replies View Related

Increment Fields

Nov 29, 2005

What I need is 2 form fields, an up link, and a down link. I want the user to be able to select one of the form fields, then increment, or decrease the number in the field that has been selected by clicking one of the links. How might I do this?

View 12 Replies View Related

How Increment The Value On Each Click ??

Apr 17, 2007

How to increment the value on each function call ? Suppose i had a function called addRow()

//js code
addRow(row)
{
var i = 0;
alert(i);
}

suppose this function is called with onclick event of button. when clicked first time it should alert 0, 2nd time => 2 3rd time => 3..

View 2 Replies View Related

How To Increment Without A ++ Operator?

Jul 30, 2002

I have a for loop and would like to increment a variable for (let's say) 2 instead of one (++). How can I do that?

I have tried for instance x + 2 instead of x++ but when I try it in IE an error saying that a script is making IE to run slowly and then nothing happens. So how to do this?

View 19 Replies View Related

Can I Increment Elements Each Loop?

Apr 15, 2011

I have written the follow code. It is meant to (when finished) output a table showing each member of the array PEOPLE. There Income ,there Tax bracket and there finally there total tax paid.The calulations in the if-else statements are correct.I have to create a loop that will go through the if else statements equal to the amount of the people in the array (This is no problem I have done this earlier)

My problem is when I try to add each element (PEOPLE) to the table or there indivual tax outcomes.Can I create a loop and increment in the elements each iteration to put on the table?(for there names) As I am not meant to store each iteration,it is to write to the table each time.This is the code I'm working on with out the loop.

<html>
<head>
<script>[code]......

View 17 Replies View Related

Increment Width Of Div OnClick?

Jul 15, 2011

I've got a div whose width I'm trying to modify when you click either the plus or minus button (incremental percentage-based).

The following is what I've written in an effort to accomplish this:

<script type="text/javascript">
function modify_jump(way) {
//check if we should increment or decrement

[code].....

View 1 Replies View Related

Increment Number In String?

Jun 27, 2011

I have a string "Slide1.jpg"

I need to increment it by 1 to say "Slide2.jpg"

I have split and sliced but I keep getting SlideNaN.jpg

Rather then fix my mess of code... There has to be a simple way of doing this..

View 5 Replies View Related

Increment Php Array Variable?

Jun 16, 2010

$i=0;
echo '<script language="javascript">
var dA = new Array();[code]...

here i want to increment $i above code is not working,

View 1 Replies View Related

JQuery :: Function To Auto-increment Certain Value

May 21, 2011

I'm trying to write some jquery that when a link is clicked it adds a number into a div. Every time the link is clicked it adds another number(previous number + 1). i have this but it definitely doesn't work function addnumber(X)[code]As it is now, the first click does nothing. The second click spits out "2<br>2<br>". The third click spits out "2<br>2<br>2<br>". The fourth "2<br>2<br>2<br>2<br>" and so on.

View 3 Replies View Related

HTML Tags Break - Won't Increment The Name?

Feb 5, 2010

The following is my javascript code to extend a form:

[Code]...

Everything works fine except for the counter/adding on to theName ( newField[i].name = theName + counter). I know exactly what the problem is... I just don't know how to fix it. If I remove the li tags, the counter will work fine and increment each "name". As soon as I put the li (see code above) tags back (or any html tag - I have tested others as well) - it breaks again and won't increment the name - it just submits the names without numbers and alas I have no usable post data. how to keep the html formatting there and still get the counter to increment the name?

View 4 Replies View Related

Create A Script That Will Increment A Number By 0.01?

Feb 12, 2011

working on building a website at the moment. and i need to create a script that will increment a number by 0.01, then stop and decrease by 0.03, then increase again by one. I wrote code to increment by 0.01 continuouly but now i can't stop it. and change to decreasing

<script type = "text/javascript">
num = 0.87;
var tim = 0;

[code]....

View 2 Replies View Related

Any Differences In Loop Increment Method?

Sep 2, 2011

The following code results in the exact same output. Is there an advantage to using i++ over ++i (or visa-versa) in the loop? :confused:

<script type="text/javascript">
var tarr1 = []; for (var i=0; i<10; i++) { tarr1.push(i); }
var tarr2 = []; for (var i=0; i<10; ++i) { tarr2.push(i); }
alert(tarr1.join(',')+'
'+tarr2.join(','));
</script>

Similar question for the increment method in the following:

[Code]....

View 3 Replies View Related

Increment Label Value On Image Click

Nov 8, 2006

How would i go about doing the following:

Im looking to increment a value of a Lable when an image is clicked.
e.g. if the label contains 1 and the image is clicked, the label should be changed to 2.

View 7 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved