How to detect form element changed?

[Colin McKinnon]

Hi,

I want to be able to detect if a form no longer contains it's initial values
before it gets submitted (to put it another way, would its values be
different if the form were reset). I could keep a hidden shadow of every
element and compare them, or set a flag via every elements onchange method
but both seem rather combersome.

Is there a simpler way to do it?

TIA,

C.

[Ivo]

Re: How to detect form element changed?

"Colin McKinnon" wrote[color=blue]
> I want to be able to detect if a form no longer contains it's initial[/color]
values[color=blue]
> before it gets submitted (to put it another way, would its values be
> different if the form were reset). I could keep a hidden shadow of every
> element and compare them, or set a flag via every elements onchange method
> but both seem rather combersome.
>
> Is there a simpler way to do it?[/color]

This shadow already exists in DOM1 supporting browsers. They call it the
defaultValue property:
<URL: http://www.w3.org/TR/1998/REC-DOM-Le...-one-html.html[color=blue]
>[/color]
<URL:

http://msdn.microsoft.com/workshop/author/dhtml/reference/properties/default

value.asp >

--Iv

[Michael Winter]

Re: How to detect form element changed?

On Sun, 15 Aug 2004 01:45:54 +0200, Ivo <no@thank.you > wrote:

[snip]
[color=blue]
> This shadow already exists in DOM1 supporting browsers. They callit the
> defaultValue property:[/color]

It's actually been supported since JavaScript v1.0, along with
defaultChecked for checkboxes and radio buttons. The latest of that type,
Option.defaultS elected, was added in v1.1.

[snipped links]

Mike

--
Michael Winter
Replace ".invalid" with ".uk" to reply by e-mail

[Colin McKinnon]

Re: How to detect form element changed?

Michael Winter spilled the following:
[color=blue]
> On Sun, 15 Aug 2004 01:45:54 +0200, Ivo <no@thank.you > wrote:
>
> [snip]
>[color=green]
>> This shadow already exists in DOM1 supporting browsers. They callit the
>> defaultValue property:[/color]
>
> It's actually been supported since JavaScript v1.0, along with
> defaultChecked for checkboxes and radio buttons. The latest of that type,
> Option.defaultS elected, was added in v1.1.
>
> [snipped links]
>
> Mike
>[/color]

Thanks both - I'll go see what else I can break

Colin