An element named 'length'

[D. Alvarado]

Hello, I'm having problems on IE 6.0 for Win XP. I want to iterate
through the elements of a form, but one of those elements is named
'length'. So, this JS code doesn't display any alert boxes, even
though it should display 3.

for (var i=0; i<myForm.elemen ts.length; i++) {
alert(myForm.el ements[i].name);
}

Can anyone suggest a cross-browser work-around? Thanks -

[Michael Winter]

Re: An element named 'length'

On 2 Feb 2004 10:32:29 -0800, D. Alvarado <laredotornado@ zipmail.com>
wrote:
[color=blue]
> Hello, I'm having problems on IE 6.0 for Win XP. I want to iterate
> through the elements of a form, but one of those elements is named
> 'length'. So, this JS code doesn't display any alert boxes, even
> though it should display 3.
>
> for (var i=0; i<myForm.elemen ts.length; i++) {
> alert(myForm.el ements[i].name);
> }
>
> Can anyone suggest a cross-browser work-around? Thanks -[/color]

Use FormObject.leng th instead.

In future, don't use names that might conflict with object properties and
methods.

Mike

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

[Brian Genisio]

Re: An element named 'length'

D. Alvarado wrote:
[color=blue]
> Hello, I'm having problems on IE 6.0 for Win XP. I want to iterate
> through the elements of a form, but one of those elements is named
> 'length'. So, this JS code doesn't display any alert boxes, even
> though it should display 3.
>
> for (var i=0; i<myForm.elemen ts.length; i++) {
> alert(myForm.el ements[i].name);
> }
>
> Can anyone suggest a cross-browser work-around? Thanks -[/color]

Hmmmm...

Option #1:
Rename the offending element to something else (such as len)

Opeiont #2:

for(var i in myForm.elements )
{
alert(myForm.el ements[i].name);
}

Brian

[Richard Cornford]

Re: An element named 'length'

"Michael Winter" <M.Winter@bluey onder.co.invali d> wrote in message
news:opr2raezg8 5vklcq@news-text.blueyonder .co.uk...
<snip>[color=blue]
>Use FormObject.leng th instead.[/color]

That probably won't help as providing the shortcut notation of allowing
named form controls to be accessed as named members of the form object
will mean that the - length - property of the form will have been
replaced with a reference to the same form control.

On DOM browsers:-

var inputs = formObject.getE lementsByTagNam e('input');
var selects = formObject.getE lementsByTagNam e('select');

- and iterating over the resulting nodeList objects. But there has got
to be a better way.
[color=blue]
>In future, don't use names that might conflict with
>object properties and methods.[/color]

And that is it. :)

Richard.

[Michael Winter]

Re: An element named 'length'

On Mon, 2 Feb 2004 19:10:32 -0000, Richard Cornford
<Richard@litote s.demon.co.uk> wrote:
[color=blue]
> "Michael Winter" <M.Winter@bluey onder.co.invali d> wrote in message
> news:opr2raezg8 5vklcq@news-text.blueyonder .co.uk...
>[color=green]
>> Use FormObject.leng th instead.[/color]
>
> That probably won't help as providing the shortcut notation of allowing
> named form controls to be accessed as named members of the form object
> will mean that the - length - property of the form will have been
> replaced with a reference to the same form control.[/color]

I seem to be overlooking a lot of details today...

Thank you. I'd also like to thank you for your advice on DOM feature
detection given last week (23rd).

Mike

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

[Richard Cornford]

Re: An element named 'length'

"Michael Winter" <M.Winter@bluey onder.co.invali d> wrote in message
news:opr2rb25au 5vklcq@news-text.blueyonder .co.uk...
<snip>[color=blue]
>I seem to be overlooking a lot of details today...[/color]

So am I. I forgot about textarea elements.
[color=blue]
>... . I'd also like to thank you for your advice on
>DOM feature detection ...[/color]

You are welcome. It is probably one of the most important aspects of
matching a script with a browser's possible support for it and deserves
talking about from time to time.

Richard.

[Michael Winter]

Re: An element named 'length'

On Mon, 2 Feb 2004 23:00:38 -0000, Richard Cornford
<Richard@litote s.demon.co.uk> wrote:
[color=blue]
> "Michael Winter" <M.Winter@bluey onder.co.invali d> wrote in message
> news:opr2rb25au 5vklcq@news-text.blueyonder .co.uk...
>[color=green]
>> I seem to be overlooking a lot of details today...[/color]
>
> So am I. I forgot about textarea elements.[/color]

I actually noticed that. :) For thoroughness, you could also mention
BUTTON elements, but they wouldn't be accessed nearly as much.

Mike

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

[John]

Re: An element named 'length'

laredotornado@z ipmail.com (D. Alvarado) wrote in
news:9fe1f2ad.0 402021032.1cff8 be7@posting.goo gle.com:
[color=blue]
> Hello, I'm having problems on IE 6.0 for Win XP. I want to iterate
> through the elements of a form, but one of those elements is named
> 'length'. So, this JS code doesn't display any alert boxes, even
> though it should display 3.
>
> for (var i=0; i<myForm.elemen ts.length; i++) {
> alert(myForm.el ements[i].name);
> }
>
> Can anyone suggest a cross-browser work-around? Thanks -
>[/color]

Umm, am I missing something? Why not just change the name of the element
named 'length'?

John

[D. Alvarado]

Re: An element named 'length'

John <john@mshome.ne t> wrote in message news:<Xns948F16 FCEE2D5johnmsho menet@203.26.24 .228>...[color=blue]
> laredotornado@z ipmail.com (D. Alvarado) wrote in
> news:9fe1f2ad.0 402021032.1cff8 be7@posting.goo gle.com:
>
> Umm, am I missing something? Why not just change the name of the element
> named 'length'?
>
> John[/color]

Normally a good idea. I do not have control over the variable name --
it is required by a third party site to which I'm passing data.

Thanks to all for the helpful answers. -