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CHI-WEB  November 2002, Week 4

CHI-WEB November 2002, Week 4

Subject:

Re: Leaf Navigation

From:

Francois Jordaan <[log in to unmask]>

Reply-To:

Francois Jordaan <[log in to unmask]>

Date:

Tue, 26 Nov 2002 11:05:13 -0000

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (95 lines)

Hi,

A while ago someone asked me my opinion regarding a menu system like you're
describing. I wrote the following:

--->%---
You're describing a DHTML hierarchical menu. (That is, branching out into
submenus.)

First question you should ask yourself is why you use it. Many sites,
especially in the earlier days of the web, did it just "because we can".
(And that fashion has, to a degree, passed.) You can also say many sites use
it as a crutch to disguise a bad/absent navigation system. The argument
goes, because you can get anywhere in the site from any page, you don't need
to worry about in-page navigation. But the purpose of navigation is not just
*getting to pages*. It also
- shows you where you are
- shows what's here -- reveals content
Anyway, dropdown/popup/flyout menus can sometimes be bad at doing the latter
two, because they only reveal information when you interact with them.

Design agencies always love them because they allow for a less "cluttered"
page. Whether navigation menus should be perceived as clutter or not is
debatable. There is such a thing as too much navigation clutter on-screen,
and there is also such a thing as too little. I am not opposed to DHTML
menus in principle; there are plenty of examples I like.

On to the next questions. Technically? It is possible to do 95% reliable
DHTML menus. If you also accept that it is not worth the cost of supporting
a handful of old, obsolete browsers with <5% market share (pre-version 5
browsers, basically), then that reliability figure can be improved still,
and build cost drastically reduced. There are plenty of *very* high profile
sites that use DHTML menus. See for example msnbc.com and of course
microsoft.com.

But you have to insist that the tech agency does a *very* good job, and
don't reduce your site's accessibility or performance through poor coding.
They don't have to write a menu system from scratch, there are plenty of
good hierarchical menu scripts available on the 'net, some even free. Let me
know if you want URLs.

Also, I'd insist that the menu is *text-based*, and not graphic-based.

Last concern: accessibility. DHTML menus have very poor accessibility for
the visually-impaired, and generally don't work with alternative browsers
(text-only, speech browsers, PDA-based browsers, TV-based browsers, etc.)
They also won't work in browsers that have Javascript turned off, which is
sometimes done in corporations for security reasons. Also, if the menu
system won't work in some older browsers, those browsers should not see it.

...That you have to weigh up against the site's browser compatibility
guidelines. But I'd recommend that the entire site is kept *accessible* even
if the DHTML menus don't work. By this I mean you should be able to reach
every page in the site without the need for the DHTML menu. The way this
usually works is that you can click on a menu item to reach the page, which
then reveals the submenu that would've popped up if the DHTML menu was
working. So getting to any page on the site just takes more clicks, but all
pages are accessible.
--->%---

Regarding the issue of whether intermediate or "node" pages actually have
content or not -- this can be a tricky issue, because clients frequently
only have content for the "destination" pages, and when it comes to writing
the intermediate pages, nobody knows whose job it is and it sometimes
results in mostly blank pages saying "please use the menu on the left to
read more about [heading]"

I'm a strong advocate of a "sub-homepage" approach for these intermediate
pages. They are designed more like home pages than destination pages, in
other words they fulfil a mostly *navigation* purpose. They use most of the
screen real estate to reveal the content further below and provide clear
links to follow. Relevant contextual links to other parts of the site can
also be included here. The problem with the hierarchical menu navigation is
that the user must understand the navigation categories perfectly to get to
where they want to go. But intermediate pages can be used to help guide the
user towards what they really want, and also satisfy the more exploratory
browser.

Francois Jordaan
Wheel
Beaumont House, Avonmore Road, Kensington Village, London, W14 8TS
T +44 (0)20 7071 8000   F +44 (0)20 7348 1111
Direct +44 (0)20 7348 1049
[log in to unmask]   www.wheel.co.uk

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