Submit or not submit

[Wim Roffal]

If I declare in a form a field with an id but without a name it will not be
submitted.
However, once I assign a name to it it seems that I am not able to undo
this.

If I say in javascript...

MyForm.MyField. name='fíeld1';
MyForm.MyField. name='';

....the result is a fieldname of length zero that is still submitted.

Similarly the delete operator does not work. If I write...

delete MyForm.MyField. name;

.... I get an error message.

Are there ways to accomplish what I want?

Thanks,
Wim

[Michael Winter]

Re: Submit or not submit

Wim Roffal wrote on 22 Nov 2003:
[color=blue]
> If I declare in a form a field with an id but without a name it
> will not be submitted.[/color]

<snip>

If all you want to do is stop a control from being submitted, disable
it, like so:

document.forms['form_name'].elements['control_name'].disabled = true;

Mike

--
Michael Winter
M.Winter@blueyo nder.co.uk.invalid (remove ".invalid" to reply)

[Lasse Reichstein Nielsen]

Re: Submit or not submit

"Wim Roffal" <wimroffelpleas e@nospamm-planet.nl> writes:
[color=blue]
> If I declare in a form a field with an id but without a name it will not be
> submitted.[/color]

Correct. According to the HTML specification, for a form control to be
successful (i.e., it will be submitted), it must have a control name.
[color=blue]
> However, once I assign a name to it it seems that I am not able to undo
> this.
>
> If I say in javascript...
>
> MyForm.MyField. name='fíeld1';
> MyForm.MyField. name='';
>
> ...the result is a fieldname of length zero that is still submitted.[/color]

It *is* a name property with a value that happens to be the empty
string. It's very much there.
[color=blue]
> Similarly the delete operator does not work. If I write...
>
> delete MyForm.MyField. name;
>
> ... I get an error message.[/color]

That surprices me. That was what I would have suggested.
What error do you get?
[color=blue]
> Are there ways to accomplish what I want?[/color]

You can also try
document.forms. MyForm.elements .MyField.name = undefined;
It is not exactly the same as deleting the property,
but it is close.

(And that was a hint not to use the form ID as a global variable. It
won't work in, e.g., Mozilla/Netscape 6).

/L
--
Lasse Reichstein Nielsen - lrn@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[Wim Roffal]

Re: Submit or not submit

Michael and Lasse, thanks for your replies:

"Michael Winter" <M.Winter@bluey onder.co.uk.inv alid> schreef in bericht
news:Xns943B830 282A77MWinterBl ueyonder@193.38 .113.46...[color=blue]
> Wim Roffal wrote on 22 Nov 2003:
>
> document.forms['form_name'].elements['control_name'].disabled = true;[/color]

In this case I don't want the field disabled. The form is submitted in an
iframe, so I want to keep my page whole.

"Lasse Reichstein Nielsen" <lrn@hotpop.com > schreef in bericht
news:3ccg365n.f sf@hotpop.com.. .[color=blue]
> "Wim Roffal" <wimroffelpleas e@nospamm-planet.nl> writes:[color=green]
> > Similarly the delete operator does not work. If I write...
> >
> > delete MyForm.MyField. name;
> >
> > ... I get an error message.[/color]
>
> That surprices me. That was what I would have suggested.
> What error do you get?[/color]

(translated form dutch) This action is not supported by this object.[color=blue]
>[color=green]
> > Are there ways to accomplish what I want?[/color]
>
> You can also try
> document.forms. MyForm.elements .MyField.name = undefined;
> It is not exactly the same as deleting the property,
> but it is close.[/color]

I tried it. But if I do this I it will submit the field with fieldname
"undefined" . (yes, I did not use quotes).
[color=blue]
> (And that was a hint not to use the form ID as a global variable. It
> won't work in, e.g., Mozilla/Netscape 6).[/color]

Thanks for the tip. I am testing this in IE 5.5 now.

Wim

[Janwillem Borleffs]

Re: Submit or not submit


"Wim Roffal" <wimroffelpleas e@nospamm-planet.nl> schreef in bericht
news:bpnrfh$2d5 $1@reader10.wxs .nl...[color=blue][color=green]
> >
> > You can also try
> > document.forms. MyForm.elements .MyField.name = undefined;
> > It is not exactly the same as deleting the property,
> > but it is close.[/color]
>
> I tried it. But if I do this I it will submit the field with fieldname
> "undefined" . (yes, I did not use quotes).
>[/color]

What you can do, is remove the element by using the removeChild method:

function remove(f, e) {
var index = null;
for (var i = 0; i < f.childNodes.le ngth; i++) {
if (f.childNodes.i tem(i).name == e) {
index = i;
break;
}
}
if (index === null) return;
return f.removeChild(f .childNodes.ite m(index));
}
....

<form method="get" action="">
<input type="hidden" name="element_a " value="1" />
<input type="hidden" name="element_b " value="1" />
<input type="button" value="remove element_a"
onclick="remove (form,'element_ a')" />
<input type="button" value="remove element_b"
onclick="remove (form,'element_ b')" />
</form>


JW

[Janwillem Borleffs]

Re: Submit or not submit


"Janwillem Borleffs" <jw@jwscripts.c om> schreef in bericht
news:3fbf7a4c$0 $118$1b62eedf@n ews.wanadoo.nl. ..[color=blue]
>
> function remove(f, e) {
> var index = null;
> for (var i = 0; i < f.childNodes.le ngth; i++) {
> if (f.childNodes.i tem(i).name == e) {
> index = i;
> break;
> }
> }
> if (index === null) return;
> return f.removeChild(f .childNodes.ite m(index));
> }
> ...[/color]

This looks nicer and does the same:

function remove(f, e) {
for (var i = 0; i < f.childNodes.le ngth; i++) {
if (f.childNodes.i tem(i).name == e) {
return f.removeChild(f .childNodes.ite m(i));
}
}
}


JW

[VK]

Re: Submit or not submit

I would say - Submit! :-)
And filter the submission on the server side (like all filelds with ""
value do not count).

On the client side you may use DOM:

with (document.myFor m) {
removeChild(ele ments('myElemen t'));
}

Still not exactly what you want: it doesn't exclude an element from the
submission, it removes the element itself.