Putting Javascript Variable Into Hidden Field
Jul 6, 2006
I wish to use J.S. to obtain the screen ht and put this value into a hidden
field for posting. so that I can then use it in a php file.
A simplified script of what I am trying to do is below, but it doesnt work.
I have not used javascript much and I'm sure its straight forward.
<script type="text/javascript" language="javascript">
var ht = document.body.clientHeight;
</script>
<form action="my.php" method="post">
input name="screenht" type="hidden" value="ht"
</form>
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Apr 10, 2009
I am new to javascript and am doing the trial by fire thing here.
I am trying to set the value of MyHiddenField to myvar1.
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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.
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Mar 30, 2010
I was wondering if it is possible to put all the non null variables of an array into a string variable with spaces between each array value? For example, if array() is a text array and has 10 values, array(0) through array(9), with three of those values null, let's say array(3), array(5), and array(7) are null, is there a way to put the remaining seven values into a string variable with spaces between each array value?
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Oct 13, 2006
How do I do something, where
var x="-20%";
document.all("something").style.top=x
normally, this would work --
document.all("something").style.top='-20%'
but the above formulation doesn't..... is there some diff way?
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May 22, 2009
the following block of code is for demonstrative purposes only:
for (x=0;x<=2;x++) {
game + x = "Game "+x;
}
Okay so looking at that you can probably get the feeling for what I want to do. why I want to do this, as obviously the above code makes no sense and can be done with arrays, but I assure you I have a purpose for doing what I want to do.
The question is, can I put a variable, like x, into a new variable's name? The idea is that the code above generates three new variables:
game0
game1
game2
I've tried using brackets and parentheses, I've tries so many things. I've even tried using the eval() function.
So, again, in short, can I place a variable into another variable's name?
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Apr 2, 2009
I have created a html purchase request form that people will fill out and submit to make purchase requests within my company. In this html form, I have a text field that is automatically populated when the page is pulled up. The text field is populated with the name of the person who is logged in and it is read only so they cannot be deceitful or anything.To get to this HTML Request form, you must log in through a webclient thus the server knows to populate your name because you are the one logged in. The text field populates because of its <input NAME = "OBProperty_CurrentUserRealName", which is a keyword the program identifies and knows to populate with the logged in users name into that particular text field.
That works all fine and dandy, so here is where the problem lies. When submitting the overall form request, the populated name isnt being saved/ carried over to the admin page so we do not know who it was submitted by.To make the persons name carry over and save, another field name keyword must be used.
Which is OBKey__163_1. Which it was suggested to me to make that the input name of a hidden field. I need "text field A" to continue to populate the form with the persons name using OBKey_CurrentUserRealName, then pass the persons name off to a hidden field containing the input name=OBKey__164_1, which will thus save/pass the persons name on with the rest of the filled out request form when its submitted.
Here is what I have:
<input name="OBProperty_CurrentUserRealName" type="text" id="buyer" style="width:100%" readonly="readonly">
<input name="OBKey__163_1" type="hidden" id="OBKey__163_1">
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Nov 14, 2010
I have a javascript in the head of the document which has a variable named "ref2" ... ref2 is already working as I can see its value working in another function. I need to send this variable as the value of a hidden field in the form which is in the body of the document.
This is my JavaScript Code:
Code:
And at the end of my form, before the submit button, I have the following code:
Code:
When I execute the form, it doesn't work the way it should, plus, gives me a word "undefined" next to the "Submit" button .....
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Nov 14, 2010
I have a javascript in the head of the document which has a variable named "ref2" ... ref2 is already working as I can see its value working in another function.I need to send this variable as the value of a hidden field in the form which is in the body of the document.This is my JavaScript Code:
function WriteContactFormStatement1 () {
var ContactFormValue = ref2;
document.write('<input type="hidden" name="UReferrersName" value="' + ContactFormValue + '"
[code]....
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Jul 20, 2005
I see some code examples like this:
<DIV onmouseover="this.style.background='blue'">
and other code examples like this:
<DIV onmouseover="javascript:this.style.background='blue'">
Which way is more proper? Or are both ways perfectly fine? Are there any
specifications that discuss when "javascript:" should be put in front of code?
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May 26, 2010
I just donīt know the right syntax for this:
I want to change the css class of the li element from the name hidden to the variable filterVal, but i donīt know the right syntax.
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Apr 22, 2007
so I have a form page for a cart to checkout, on the first page, I am using the form action get and the page to pass the variables in the url to...
on the next page, I have grabbing some of them using the document.indexOf function...works great just using document.write(what is returned from the indexOf function); obviously, this just outputs the value in text, however, I need to set the value of a specific hidden field on the same page/form to that of what is returned by what I described above:
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Oct 24, 2010
I am still learning jquery but I am wondering why this code does not work. I have a select field called item_name and a hidden field called amount. Based on the selection in item_name, I want to set the value of the hidden field (amount) to a set value. For example:
$(document).ready(function () {
$('#item_name').change(function () {
var value = $('#item_name').val();
if(value == "institutional memberhip"){
$("#amount").val("$349.00");
[Code]...
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Oct 6, 2006
I want to have a window pop up with a form. When the form is submitted,
it needs to pass along the URL of the original window. If find on th
web eight gazillion descriptions of how to pass data from one page to
another via hidden fields, but not a word about how to pass that data a
second time. Code:
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Feb 21, 2009
Have a javascript in which i am trying to assign the value to a hidden field and getting the below msg:
I am getting the value in the alert box but not able to assign it o teh control
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Apr 9, 2009
I have a little bit of Javascript that runs fine, but I am trying to write some XML out so that it is the value of a hidden field. When I put it in the hidden field, it just shows the javascript instead of the value.
So, instead of showing the value of i++ it is showing <script>i++</script>
What I want it to show:
What it is showing
It works in the regular page, just not when I make it the value of the hidden form field. Sorry, kinda new to javascript.
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Sep 21, 2009
I have the following hidden field within a form:<input type="hidden" name="test12" value="test12" />I also have the following function which does something if that field exists:
if(document.formName.test12.value == "thisdata")
{
//do something
[code]....
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Feb 21, 2009
have a javascript in which i am trying to assign the value to a hiden field and getting the below msg'document.Form1.H_ROWID' is null or not an objecti am getting the value in the alert box but not able to assign it o teh control alert("row " +M_ROWID)document.Form1.H_ROWID.value = M_ROWID
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Jan 20, 2010
I am currently working on a small Ajax image upload script using some clever iframes, php and a lytebox to create a seamless application. a small link on a page starts my lytebox that essentially opens a new page inside this. this page takes a file upload and using an iframe posts to a php script that will validate the file and upload to the server, the location of this file is then posted back to the iframe for viewing. Once this completes I have a cropping tool available for users to make final adjustments to their image before saving this and sending the new cropped image location to a value of a hidden text box. Once the user is happy with this they can click close to return to the parent page, upon doing this the value of the hidden filed is passed back to parent page and saved into another hidden filed to use. ( To clarify, i use hidden values as the parent page is the actual upload script.
My lytebox version was created to allow usability for users to re-size and crop their image before upload, all this happens in the lytebox to appear like its just a cropping tool.) Its at this point I am having some difficulty. I want to alert the user that the upload has been successful and all that is required is the user to hit save. This was ultimately save the finished image with all the users date in the database. I thought I could use an onchange event to trigger a function that would insert text into a div but this wont work. My code for the parent page and the hidden field is:-
[Code]..
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Mar 30, 2011
I saw this on a website, and I'm confused as to what the possible purpose could be for this.
Code:
<input id="myIDNAME" name="myIDNAME" type="hidden" value="0" />
<input id="myIDNAME" name="myIDNAME" type="checkbox" value="0" />
I thought repeating an ID would return an error.
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Dec 1, 2010
a user goes to a page, selects a value from a select box then clicks a link to run a report using that hidden variable as a parameter. I am attempting to place the value in the URL to pass it. I'm sure the javascript is working, and maybe it's the HTML I've messed up - not sure.Here is the javascript (the alert does return the correct value):
function OnChangeDay() {
//assign the day id to the hidden variable $day
x=eval(document.getElementById("day_loc_id_select").value)
[code]....
And here is the HTML that should send the value, but I get day= (nothing)
<a href='/depts/edoptions/excel_extract.php?ex=2&day=<? echo $test_day ?>'>SLIP Data to Excel</a>
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Jul 23, 2005
I have a form whereby I can add multiple contacts to a single address.
There is only one firstname/lastname/telephone box - when the user
clicks the add button, I read the values from the form fields and
record them into a hidden text input field. This part works because
during debugging, I have converted the <input type=hidden> into a <input
type=text> to visably confirm my data is being copied into the 'hidden'
field.
Once the user has entered in one or more names, they can click another
button and submit the form for processing. My idea is that I would then
parse this hidden field server side...
I have a WAMPHP based server and as a test, I dump out my entire $_POST
(basically, the name and value in every INPUT tag).
My PHP script picks up the name of every input tag, including the hidden
field (like it should) but for some reason, the value that was written
to the hidden field is not passed to the server. Thus, for the PHP folk
reading this post, my hidden input field is called mylist and
$_POST['mylist'] exists, but its empty. Even though before processing,
I could visably see the input in the box (for debugging remember, I made
the input tag box a normal, unhidden one).
Here is what I have done to try and resolve:
- I have used both Mozilla 1.7.5 and IE6 - both provide same results -
my hidden field name gets passed, but not its value.
- I have created another hidden field and given it a default value ie I
have <input type="hidden" name="extraone" value="xyz"> and I get
$_POST['extraone']="xyz" passed to my php server, like I would expect -
however, the value of mylist is sent empty, even though it has data.
- I have even put in a javascript alert box just before the form is sent
to the server and can see the result in my (unhidden) box, and the same
value displayed in the javascript alert - but again, the value of the
mylist does not get sent to the server.
The only difference is that my hidden field (even if its displayed like
an ordinary text input box) does not post data written to form fields as
the result of a javascript function. Interestingly though, the server
does know about the input tag box since it does receive
$_POST['mylist'], it justs receives it empty.
What gives? If the form reads my input from one field, and writes it to
another field, then it should be sent to the server, true?
Also... my tags are all inside my <form></form> tag (which is proven by
double checking, and the fact that I do get the input tag box name sent
to my server).
Since I can see the data values in the box, it tells me my javascript is
doing what it should be doing - so I don't see any point in including my
javascript (though I have no problems doing so if someone requests
it). On the php server, I am using a simple phpinfo(); to check the
data is being received...
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Aug 12, 2007
i have a form in which a hidden field (initial value as Ɔ', and my javascript set it to Ƈ' when an event is trigged). In the same form, i have a reset field. But I realized that the hidden field is not reset to Ɔ' when i push the
reset button. If I simply change the node from
"<input type="hidden" id='IsChanged' value=Ɔ'>"
to
"<input type="text" id='IsChanged' value=Ɔ'>"
Everything is working as expected (the value is reset to Ɔ' when I
push the reset button) Why does this happen?
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Aug 1, 2009
i have a page with lots of checkboxes and hidden fields. When i tick a checkbox i want it to give the hidden filed a value. But give it no value if it is not ticked. For every checkbox i have a hidden field is with it. Both the checkbox and the hidden field send information. I have used some js scripts but they don't seem to work with more than one checkbox.Example:
<input type="checkbox" name="box1" id="box1" value="4th July 2009,">
<input type="hidden" name="price1" id="price1" value="0">
So when box1 is ticked it then gives price1 a value. But if not ticked then the value remains at 0. I want it to give a value of 699.There will be about 100 checkboxes and hidden fields on the page. Also onclick behaviours do not work because it may still send the information if the checkbox is not checked.So for the next checkbox and hidden field i use box2 and price2.
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Aug 6, 2009
I was tasked with creating a JavaScript quiz...I succeeded in doing so but part of the requirement was to use hidden fields for the answers.
Would this be possible using the code I currently have:
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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]...
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