473,388 Members | 976 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,388 software developers and data experts.

Dynamic input field generation

Hello,

I'd like some help trying to generate input fields on the fly. What I
have on an HTML page is a single text input field labelled #1, e.g. #1
<input type="text">. Next to the field is a button that, on click, I'd
like to automatically generate a second text input field below the
first, labelled #2. Everytime the button is clicked, another field is
created with an incremented label.

I explored iframes, but these text fields will be part of a larger
form that has to be passed together. I'd rather not use hidden text
fields because I don't want to hardcode a limit to the number of
fields available. Please point me in the right direction, or let me
know if this isn't possible.

Thanks.
Jul 20 '05 #1
2 17344
try this

place this code in the head
<script>
var i=1 // count amount of formfields
function createNewInput(){
i++
findObj("dynForm").innerHTML+="<br><input type='text' id='field" + i + "'
value='whatever'>"
findObj("dynForm").innerHTML+="<input type='button' value='add new'
onClick='createNewInput()'>"
alert(findObj("dynForm").innerHTML)
}

function findObj(n, d) { //v4.0
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);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++)
x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++)
x=findObj(n,d.layers[i].document);
if(!x && document.getElementById) x=document.getElementById(n); return x;
}

</script>

place this in the body

<table>
<tr>
<td id="dynForm"><input type='text' id='field1' value='whatever'><input
type='button' value='add new' onClick='createNewInput()'></td>
</tr>
</table>
Simon



"Rosebud" <su**********@yahoo.com> wrote in message
news:c8**************************@posting.google.c om...
Hello,

I'd like some help trying to generate input fields on the fly. What I
have on an HTML page is a single text input field labelled #1, e.g. #1
<input type="text">. Next to the field is a button that, on click, I'd
like to automatically generate a second text input field below the
first, labelled #2. Everytime the button is clicked, another field is
created with an incremented label.

I explored iframes, but these text fields will be part of a larger
form that has to be passed together. I'd rather not use hidden text
fields because I don't want to hardcode a limit to the number of
fields available. Please point me in the right direction, or let me
know if this isn't possible.

Thanks.

Jul 20 '05 #2
"steve stevo" <st***@stevosteve.fsnet.co.uk> writes:

Please don't top post.
<script>
The type attribute is mandatory
<script type="text/javascript">

The "findObj" function appears to be a generic function. Quite
ingenious. Am I correct in deducing that an argument like
"elemName?frameName" tries to find the element named "elemName" in the
sibling frame called "frameName"?

It then tries to find the function using (in this order)
d[elemName]
d.all[elemName]
d.forms[i][elemName] (i ranging over all forms)
d.layers[i].* (i ranging over all layers, find recursively)
document.getElementById(elemName)

To be even better at finding elements in NS4, you could also search
through document.{links,anchors,images,forms,applets} (or what other
collections NS4 has available). I would test for document.getElementById
first, since more present browsers would be caught there.

function findObj(n, d) { //v4.0
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);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++)
x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++)
x=findObj(n,d.layers[i].document);
if(!x && document.getElementById) x=document.getElementById(n); return x;


change "document.getElementById" to "d.getElementById", or it won't find
elements in other frames in Mozilla.

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
Art D'HTML: <URL:http://www.infimum.dk/HTML/randomArtSplit.html>
'Faith without judgement merely degrades the spirit divine.'
Jul 20 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

7
by: pizzy | last post by:
PROBLEM: I CAN'T GET THE LAST RESUTS TO WORK CORRECTLY. I WOULD PROVIDE THE CODE (AND WILL IF REQUESTED). BUT IN MY OWN WORDS I AM TRYING TO HAVE THE FIRST FORM DYNAMICALLY CREATE INPUT BOXES...
7
by: Venus | last post by:
Hello, I am trying to generate a dynamic form at runtime and would like to do it using "<asp: ..." form elements as follows Build up the string that is placed somewhere in the HTML code the...
4
by: Venus | last post by:
Hello, Thanks for your reply. I understand that a control can be created dynamically in several ways: 1) using StringBuilder 2) using Controls.Add 3) using ASP PlaceHolder But this is just...
0
by: Venus | last post by:
Hello, After trying some ways to do it I wanted to use something like the code below but for some reason is not working (I have to generate the entire form dynamically (not only the controls)):...
0
by: MattB | last post by:
Hi. I'm on my second redesign of a dynamic form I need to create and I'm looking for good examples and/or suggestions. I have a web application that is being distributed to different clients of...
4
by: DraguVaso | last post by:
Hi, For my VB.NET application I have the following situation: 2 tables on my SQL Server: tblAccounts and tblRules. For each Account there are many Rules (so tblRules is linked to my tblAccounts...
34
by: clinttoris | last post by:
Hello Experts, I have been told to post this in the Javascript forum as I want to do this client side just before my form gets submitted. Once the user clicks the submit button a javascript...
3
by: Mukesh | last post by:
sir, i am developing a database, which will store the users profile both personal and professional which includes the address, telephone, gender and etc. in my main table i have created a column...
1
by: gau.tai | last post by:
I have a form in which I am generating dynamic fields. I can do this fine, but when I go to validate them there are errors. The non- dynamic fields validate correctly. Below is the html and js. ...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.