Re: Web Accessibility: Detecting Assistive Technology

  • From: "Martin Slack" <m.g.slack@xxxxxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Fri, 20 May 2011 18:16:52 +0100

A benefit might well be that you were able to allow a user to run your application unlicensed for 35 minutes before closing it down, not to mention disabling such an action 6 months after its initial use.


But how to do it?


 Martin



----- Original Message ----- From: "Homme, James" <james.homme@xxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Friday, May 20, 2011 5:57 PM
Subject: RE: Web Accessibility: Detecting Assistive Technology


Hi,
If you were a screen reader application, What is involved in registering with something, and would their be any benefits to doing it?

Jim

From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of E.J. Zufelt
Sent: Friday, May 20, 2011 8:18 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Web Accessibility: Detecting Assistive Technology

Flash is a browser extension, so by installing Flash into the browser there is an ability to use Javascript to create a Flash object that can be injected into the DOM.

Even if you simply insert your flash object in the page source, and do not create it using Javascript, I believe that there is an ability to provide fallback content for browsers where the Flash object doesn't load.

So, Javascript can "detect" flash because it can access the objects registered by the browser extension, but since screen-readers do not register themselves with browsers there is no way to detect them.

HTH,
Everett Zufelt
http://zufelt.ca

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On 2011-05-20, at 7:49 AM, DaShiell, Jude T. CIV NAVAIR 1490, 1, 26 wrote:


Hacker tools are needed for that kind of detection.  If javascript can't
do it a properly configured hacker tool can be used to detect that a
screen reader is not being used in browsing.  If a tool finds none of
the directory paths that screen reader applications put on machines as
well as screen reader executeables it's safe to say no screen reader was
being used in the browsing.  If javascript isn't allowed or capable of
doing a directory search though, how is it websites detect flash isn't
loaded though?

-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx<mailto:programmingblind-bounce@xxxxxxxxxxxxx>
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James
Sent: Thursday, May 19, 2011 16:23
To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx>
Subject: Web Accessibility: Detecting Assistive Technology

Hi,

Is there a way through JavaScript or other means to detect that there
may be a screen reader or other assistive technology browsing a page?



Thanks.



Jim



Jim Homme,

Usability Services,

Phone: 412-544-1810.




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