Javascript form validation - comments please

[Stephen Poley]

Re: Javascript form validation - comments please

On Sat, 6 Dec 2003 08:00:10 +0100, "Nico Schuyt" <nschuyt@hotmai l.com>
wrote:
[color=blue]
>Stephen Poley wrote:[color=green]
>> http://www.xs4all.nl/~sbpoley/webmatters/formval.html[/color]
>
>Nice! But why still apply js when the server side testing is so complete?[/color]

I do try to explain that on the page.
[color=blue]
>IMO the form should :
>- use cookies to prevent people have to fill in all the fields again next
>time[/color]

Could be appropriate in some cases, but OTOH some forms tend only to get
filled in once. And of course quite a lot of people have cookies
disabled. A bit out of the scope of this article.
[color=blue]
>- send a copy of the mail to the sender (I hate to make copies myself or not
>knowing later what exactly I submitted)[/color]

Good point, but not an appropriate feature of the form itself - that
would need to be done by the server script. (And one would of course
need anti-spammer precautions).

--
Stephen Poley

http://www.xs4all.nl/~sbpoley/webmatters/

[Stephen Poley]

Re: Javascript form validation - comments please

On Tue, 09 Dec 2003 14:30:14 +0000, Vigil <me@privacy.net > wrote:
[color=blue]
>Hmm. I am using Opera 7.23 on an Athlon XP 2something. I have also checked
>with the Mozillas and MSIE in WinXP (same machine). Always the CPU load
>goes up. Try running a CPU load monitor and yours should too.
>Alternativel y, make a test page without the static bg and put them side by
>side, scroll each and you might notice the static bg page is slightly less
>smooth (depending on your CPU, of course). I've heard it reported that it
>does it on all browsers.
>
>On Mon, 08 Dec 2003 16:16:35 +0100, Stephen Poley wrote:
>[color=green][color=darkred]
>>>Is it just me that is sent
>>>into CPU overwork when a static bg is used?[/color]
>>
>> I've had one person complain about that before; it turned out he was
>> running Netscape 7 / Mozilla (I forget which) on a machine slower than
>> the recommended minimum hardware configuration. What is your
>> configuration?[/color][/color]

I did make a test page as you suggested, but I couldn't see any
difference to the smoothness of scrolling. The CPU load went up to 100%
in both cases. I'm using Opera 7.21.

Not sure what my CPU is, but it was the slowest [1] I could find when I
bought it just under 18 months ago.

[1] OK, cheapest.

--
Stephen Poley

http://www.xs4all.nl/~sbpoley/webmatters/

[Lasse Reichstein Nielsen]

Re: Javascript form validation - comments please

Toby A Inkster <UseTheAddressI nMySig@deadspam .com> writes:
[color=blue]
> Stephen Poley wrote:
>[color=green]
>> '@type'?[/color]
>
> Short for 'the attribute "type"'. This derives from the XPath spec.[/color]

Bad choice in combination with @media, which is a CSS declaration.

/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.'

[Lasse Reichstein Nielsen]

Re: Javascript form validation - comments please

Stephen Poley <sbpoley@xs4all .nl> writes:
[color=blue]
> I'd be happy to bin innerHTML completely, but I understand that it's the
> best available with IE - unless you know different?[/color]

It is the best available to IE 4.
You can use W3C DOM methods in IE 5 and forward.

IE 4 is about as usable as Netscape 4, but both still have users. Sadly.

/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.'

[Dr John Stockton]

Re: Javascript form validation - comments please

JRS: In article <pan.2003.12.09 .07.35.02.43556 2@goddamn.co.uk >, seen in
news:comp.lang. javascript, Toby A Inkster <UseTheAddressI nMySig@deadspam
..com> posted at Tue, 9 Dec 2003 07:35:06 :-[color=blue]
>Dr John Stockton wrote:
>[color=green]
>> But the distribution does not include the manual;[/color]
>
>Mine did.
>[/color]

If you got a version that will run at a Win98 DOS prompt, what was the
URL you got it from?

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://jibbering.com/faq/> Jim Ley's FAQ for news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htm> JSc maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/> TP/BP/Delphi/JSc/&c, FAQ topics, links.

[Toby A Inkster]

Re: Javascript form validation - comments please

Dr John Stockton wrote:
[color=blue]
> If you got a version that will run at a Win98 DOS prompt, what was the
> URL you got it from?[/color]

No, I have a version that runs from the Linux tcsh prompt.

--
Toby A Inkster BSc (Hons) ARCS
Contact Me - http://www.goddamn.co.uk/tobyink/?page=132

[Thomas 'PointedEars' Lahn]

Re: Javascript form validation - comments please

Stephen Poley wrote:
[color=blue]
> My feeling is that if an error can only be triggered by an *authoring*
> mistake (such as mistyping an id) then it's probably better to let it
> trigger a Javascript error which tells the author where to look, rather
> than have it do nothing and leave one scratching ones head.[/color]

The problem is that JavaScript errors are not always visibly announced,
so if you want to make sure that authors see their mistakes, you need
to use alert(...).

BTW please stop crossposting, this ha[ds] nothing to do with HTML anymore.


F'up2 cljs

PointedEars

[Vigil]

Re: Javascript form validation - comments please

Odd that it should go up to 100% on a 'normal' (no static bg) page...

On Tue, 09 Dec 2003 22:06:12 +0100, Stephen Poley wrote:
[color=blue]
> I did make a test page as you suggested, but I couldn't see any difference
> to the smoothness of scrolling. The CPU load went up to 100% in both
> cases. I'm using Opera 7.21.[/color]

--

..

[Stephen Poley]

Re: Javascript form validation - comments please

On Tue, 09 Dec 2003 23:36:33 +0100, Lasse Reichstein Nielsen
<lrn@hotpop.com > wrote:
[color=blue]
>Stephen Poley <sbpoley@xs4all .nl> writes:
>[color=green]
>> I'd be happy to bin innerHTML completely, but I understand that it's the
>> best available with IE - unless you know different?[/color]
>
>It is the best available to IE 4.
>You can use W3C DOM methods in IE 5 and forward.[/color]

I understood IE 5 was almost a dead loss as far as the W3C DOM was
concerned, but your comment prodded me to go Googling, and
http://www.quirksmode.org/dom/w3c_core.html suggests it's not as bad as
I had thought.

However I've now discovered (to my surprise) that Opera 7 requires the
innerHTML version. :-(

--
Stephen Poley

http://www.xs4all.nl/~sbpoley/webmatters/

[Dr John Stockton]

Re: Javascript form validation - comments please

JRS: In article <pan.2003.12.10 .07.25.04.66723 3@goddamn.co.uk >, seen in
news:comp.lang. javascript, Toby A Inkster <UseTheAddressI nMySig@deadspam
..com> posted at Wed, 10 Dec 2003 07:25:09 :-[color=blue]
>Dr John Stockton wrote:
>[color=green]
>> If you got a version that will run at a Win98 DOS prompt, what was the
>> URL you got it from?[/color]
>
>No, I have a version that runs from the Linux tcsh prompt.[/color]

In that case, there is not necessarily a later DOS-32 compilation;
though the equivalent to what you have ought to be available to me.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME. ©
Web <URL:http://www.merlyn.demo n.co.uk/> - w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/> - see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.