W3C home > Mailing lists > Public > www-validator@w3.org > August 2004

Re: [VE][108] Error Message Feedback

From: Jukka K. Korpela <jkorpela@cs.tut.fi>
Date: Thu, 5 Aug 2004 12:25:10 +0300 (EEST)
To: Helmut Steinle <hcs@mpe.mpg.de>
Cc: www-validator@w3.org
Message-ID: <Pine.GSO.4.58.0408051213420.25392@korppi.cs.tut.fi>

On Thu, 5 Aug 2004, Helmut Steinle wrote:

> how can I avoid that an image used as an radio button gets a border?

By not using an image as a radio button (whatever you meant by that).

> I use the code
>
> <INPUT type=image src="goto.gif" align="middle" border="0">
>
> and it works,

If it "works" as a radio button, it is an error. It is by definition an
image submit button. By the way, it lacks essential attributes - what will
happen on non-visual browsers, which have no clue of how it should be
presented to the user? But validators won't help here, since formally the
ALT attribute is not required (and cannot be required, since the way DTDs
work, it would have to be required to _all_ INPUT elements).

> but the validator says the border attribute is not valid.

That is correct. This is really the only thing that pertains to
validation. A validator simply checks whether a document complies with a
formalized syntax. And this is a simple situation: no HTML specification
allows, in its DTD, a BORDER attribute for an INPUT element.

> I tried to overcome this problem by using css, but
>
> input {border-color:....} has no effect.

Although this is off-topic, let me guess: You have tested the page on
Netscape 4 and observed that the browser by default draws a border around
an image submit button. (Besides, Netscape 4 has notoriously incomplete
and buggy implementation of CSS.) The correct answer is "ignore it". It's
questionable whether the feature is useful or not; and the few souls that
still use Netscape 4 might be _accustomed_ to it, so that you only make
things worse if you try to tune the presentation on that almost
ignorable browser.

-- 
Jukka "Yucca" Korpela, http://www.cs.tut.fi/~jkorpela/
Received on Thursday, 5 August 2004 05:29:15 UTC

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