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Re: Web accessibility and usability

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From: michael.brockington
Date: Oct 12, 2004 6:45AM

> From: p.h.lauke [mailto: <EMAIL REMOVED> ]

> > ...
> > Can anyone expand a little on what the second part of this
> > statement means?
> > The clickable part is simple, but _nothing_ can affect the
> > original source
> > code, so what does it mean?
>
> It doesn't refer to the original source code (as in the
> source stored on the server), but the source as processed
> (internally) by the browser. When doing DOM based
> javascripting, the scripts have the power to add, remove,
> change any node in the document object model. Effectively,
> you can generate new elements, fill in new content,
> completely delete elements, etc. These changes affect the
> (internal) source of the HTML document as kept by the browser
> (client side).
>

(I obviously need to do a little work on my communication skills, since
no-one ever seems to understand what I am trying to say on this forum.)

Thanks for the explanation of DOM-based scripting - but that wasn't what I
wanted to know. Most scripting is currently done via simpler methods, eg
showing/hiding s that already exist in the source code, image
roll-overs, modifying form fields etc. Which, if any of these operations are
currently safe, and which aren't? If a form field has a default value, then
even the latter could be construed as a modification to the source.

Mike


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