Accessing hidden objects in a form

[Craig Anderson]

Can anyone tell me the best way to access a hidden object in a form? I
could use a hard-coded index to the elements of the form, but it's too
easy to add something before the hidden object and mess up the
indexing.

For example:

The form has a tagid of "myForm"
The hidden object has a tagId of "myHiddenOb j"

I can get the form elements by using
var formElements = document.getEle mentById('myFor m').elements

But there doesn't seem to be any way to do this:
document.getEle mentById('myHid denObj')

Assuming I have the elements as obtained above, none of these have
worked for me either:

formElements['myHiddenObj']
formElements["myHiddenOb j"]
formElements.my HiddenObj

Anyone have an idea?

[Java script Dude]

Re: Accessing hidden objects in a form

craig.anderson@ vykor.com (Craig Anderson) wrote in message news:<eae5d3ca. 0407011603.e548 317@posting.goo gle.com>...[color=blue]
> Can anyone tell me the best way to access a hidden object in a form? I
> could use a hard-coded index to the elements of the form, but it's too
> easy to add something before the hidden object and mess up the
> indexing.
>
> For example:
>
> The form has a tagid of "myForm"
> The hidden object has a tagId of "myHiddenOb j"
>
> I can get the form elements by using
> var formElements = document.getEle mentById('myFor m').elements
>
> But there doesn't seem to be any way to do this:
> document.getEle mentById('myHid denObj')
>
> Assuming I have the elements as obtained above, none of these have
> worked for me either:
>
> formElements['myHiddenObj']
> formElements["myHiddenOb j"]
> formElements.my HiddenObj
>
> Anyone have an idea?[/color]



document.getEle mentById is for accessing HTML elements with id's. If
there is no ID, you will not see them. Unfortunately ID access is
slow as the data is not efficiently indexed. Instead access through
document.forms. ..

Use form document.forms['formname'] and for the elements, I prefer to
use the shortcut to the elements
document.forms['formname']['formelemname']. This syntax works smoothly
in Mozilla and IE.

I generally assign the form to a global variable `oF` since I commonly
access it more that once in my code
(window.oF=docu ment.forms['formname']). I Then reference with the
shortcut accessor oF['myHiddenObj'] to access form elements in. This
syntax is the the most compact and should be efficient. I have not
tested this syntax outside of Moz and IE though. For standards
compliant access, use document.forms['formname'].elements['elemname'].

There is one known bug in IE with the shortcut syntax above whereas if
the form element names start with a number ( which it should not
anyway ) IE cannot find them.

For additional info check out javascript FAQ -

http://www.jibbering.com/faq/faq_notes/form_access.html#faComMis

JsD

[Ralph Snart]

Re: Accessing hidden objects in a form

On 1 Jul 2004 17:03:44 -0700, Craig Anderson <craig.anderson @vykor.com> wrote:[color=blue]
>Assuming I have the elements as obtained above, none of these have
>worked for me either:
>
> formElements['myHiddenObj']
> formElements["myHiddenOb j"]
> formElements.my HiddenObj
>
>Anyone have an idea?[/color]

document.forms['nameofform']['myHiddenObj'] should work *IF* the script fragment
comes physically after the form element on the page.

-rs-

[Thomas 'PointedEars' Lahn]

Re: Accessing hidden objects in a form

Ralph Snart wrote:[color=blue]
> On 1 Jul 2004 17:03:44 -0700, Craig Anderson <craig.anderson @vykor.com> wrote:[/color]

Please do not write attribution novels. The information you have
included is already contained in the headers of the involved postings.
Only the poster's name is required to see who wrote what of the quoted
text. <http://www.netmeister. org/news/learn2quote.htm l>
[color=blue]
> [...]
> document.forms['nameofform']['myHiddenObj'] should work *IF* the
> script fragment comes physically after the form element on the page.[/color]

When a DOM object becomes available depends on the DOM, on the UA.
Furthermore, your referencing is neither standards compliant nor
backwards compatible. The following is both:

document.forms['nameofform'].elements['myHiddenObj']

However, in most cases relative referencing, such as starting
from the (parent) form element with `this' or `this.form' in
an event handler, will suffice.


PointedEars

[Dr John Stockton]

Re: Accessing hidden objects in a form

JRS: In article <40EF3893.80103 06@PointedEars. de>, seen in
news:comp.lang. javascript, Thomas 'PointedEars' Lahn
<PointedEars@nu rfuerspam.de> posted at Sat, 10 Jul 2004 02:30:11 :[color=blue]
>Ralph Snart wrote:[color=green]
>> On 1 Jul 2004 17:03:44 -0700, Craig Anderson <craig.anderson @vykor.com>[/color]
>wrote:
>
>Please do not write attribution novels. The information you have
>included is already contained in the headers of the involved postings.
>Only the poster's name is required to see who wrote what of the quoted
>text. <http://www.netmeister. org/news/learn2quote.htm l>[/color]


The current Internet draft REQUIRES more than that, and is quite
encouraging to those who wish to provide more than is strictly called
for.

http://www.ietf.org/internet-drafts/draft-ietf-usefor-useage-00.txt

Please stop trying to be a petty dictator; Mussolini at least did (or so
I have heard) something towards getting the trains to run on time, and
dictatorial mis-rule is nowadays considered passé.



Aside : ISTM that the "stringy" LZ is a little slower than the numeric
one; unless others find otherwise, it's probably best used only
for bases other than 10.



TL wrote elsewhere :[color=blue]
>The word "I" is always capitalized in English.[/color]

Unfamiliar with e e cummings, then?

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME ©
Web <URL:http://www.uwasa.fi/~ts/http/tsfaq.html> -> Timo Salmi: Usenet Q&A.
Web <URL:http://www.merlyn.demo n.co.uk/news-use.htm> : about usage of News.
No Encoding. Quotes before replies. Snip well. Write clearly. Don't Mail News.

[Grant Wagner]

Re: Accessing hidden objects in a form

Dr John Stockton wrote:
[color=blue]
> JRS: In article <40EF3893.80103 06@PointedEars. de>, seen in
> news:comp.lang. javascript, Thomas 'PointedEars' Lahn
> <PointedEars@nu rfuerspam.de> posted at Sat, 10 Jul 2004 02:30:11 :[color=green]
> >Ralph Snart wrote:[color=darkred]
> >> On 1 Jul 2004 17:03:44 -0700, Craig Anderson <craig.anderson @vykor.com>[/color]
> >wrote:
> >
> >Please do not write attribution novels. The information you have
> >included is already contained in the headers of the involved postings.
> >Only the poster's name is required to see who wrote what of the quoted
> >text. <http://www.netmeister. org/news/learn2quote.htm l>[/color]
>
> The current Internet draft REQUIRES more than that, and is quite
> encouraging to those who wish to provide more than is strictly called
> for.
> http://www.ietf.org/internet-drafts/...-useage-00.txt
>
> Please stop trying to be a petty dictator; Mussolini at least did (or so
> I have heard) something towards getting the trains to run on time, and
> dictatorial mis-rule is nowadays considered passé.[/color]

What I find most annoying is that he claims such "attributio n novels" waste
bandwidth and make it harder to follow the flow of the usenet post, but Thomas'
responses to such "novels" are longer (thereby wasting _more_ bandwidth) and
disrupt the flow of the post even further.

Much like banner ads on Web sites, I mentally "tune out" the noise introduced by
quoted material on usenet, but his responses to the noise appear at first to
contain meaningful information. It is only after I have read most of his response
that I realize it is nothing more then additional noise.

--
Grant Wagner <gwagner@agrico reunited.com>
comp.lang.javas cript FAQ - http://jibbering.com/faq