Javascript & Captcha

[Daniel Kaplan]

I noticed a lot of sites that do sign ups in Javascript seem to skip the
Captcha part. I just want to know...is it that safe or am I missing
something?

[GArlington]

On Oct 15, 11:38*am, "Daniel Kaplan" <[e-mail]:

I noticed a lot of sites that do sign ups in Javascript seem to skip the
Captcha part. *I just want to know...is it that safe or am I missing
something?

You are missing the explanation of what you actually want...

[Daniel Kaplan]

"GArlington" <ga********@tiscali.co.ukwrote in message
news:85**********************************@s20g2000 prd.googlegroups.com...
On Oct 15, 11:38 am, "Daniel Kaplan" <[e-mail]:

I noticed a lot of sites that do sign ups in Javascript seem to skip the
Captcha part. I just want to know...is it that safe or am I missing
something?

You are missing the explanation of what you actually want...

What I meant was...does doing a "sign up" or "register" routine via
Javascript somehow circumvent the need for using a CAPTCHA? I would think
no. But so many sites seem to be going that route.

[Laser Lips]

On Oct 15, 12:02*pm, "Daniel Kaplan" <[e-mail]:

"GArlington" <[e-mail] in message

news:85**********************************@s20g2000 prd.googlegroups.com...
On Oct 15, 11:38 am, "Daniel Kaplan" <[e-mail]:

I noticed a lot of sites that do sign ups in Javascript seem to skip the
Captcha part. I just want to know...is it that safe or am I missing
something?

You are missing the explanation of what you actually want...

What I meant was...does doing a "sign up" or "register" routine via
Javascript somehow circumvent the need for using a CAPTCHA? *I would think
no. *But so many sites seem to be going that route.

Hi, you can also do a CAPTCHA in JavaScript...like this one >>
http://cylo.co.uk/CAPTCHA.html

Graham

[Gregor Kofler]

Daniel Kaplan meinte:

What I meant was...does doing a "sign up" or "register" routine via
Javascript somehow circumvent the need for using a CAPTCHA? I would think
no. But so many sites seem to be going that route.

Why would you need a captcha for "sign up" or "register" at all? Apart
from annoying the visitors of your webpage.
Gregor

--
http://photo.gregorkofler.at ::: Landschafts- und Reisefotografie
http://web.gregorkofler.com ::: meine JS-Spielwiese
http://www.image2d.com ::: Bildagentur für den alpinen Raum

[Laser Lips]

On Oct 15, 1:57*pm, Gregor Kofler <[e-mail]:

Daniel Kaplan meinte:

What I meant was...does doing a "sign up" or "register" routine via
Javascript somehow circumvent the need for using a CAPTCHA? *I would think
no. *But so many sites seem to be going that route.

Why would you need a captcha for "sign up" or "register" at all? Apart
from annoying the visitors of your webpage.

Gregor

--http://photo.gregorkofler.at::: Landschafts- und Reisefotografiehttp://web.gregorkofler.com*::: meine JS-Spielwiesehttp://www.image2d.com* ** ::: Bildagentur für den alpinen Raum

Bots of course, DOH!

[Dr J R Stockton]

In comp.lang.javascript message <SW*************@nntpserver.swip.net>,
Wed, 15 Oct 2008 14:57:56, Gregor Kofler <us****@gregorkofler.at>
posted:

>
Why would you need a captcha for "sign up" or "register" at all? Apart
from annoying the visitors of your webpage.

As a general remark : I find that which Google sometimes gives is often
hard to get right, whereas that which Wikipedia gives when a new URL is
entered in an article is easy to read. Presumably both are sufficiently
effective. I don't know whether, technically, they count as CAPCHAs.
SAM, Lasse, Martin might get different Wiki ones.

The Google one annoys me; the Wiki one does not.

--
(c) John Stockton, nr London, UK. ?@merlyn.demon.co.uk Turnpike v6.05 MIME.
Web <URL:http://www.merlyn.demon.co.uk/- FAQqish topics, acronyms & links;
Astro stuff via astron-1.htm, gravity0.htm ; quotings.htm, pascal.htm, etc.
No Encoding. Quotes before replies. Snip well. Write clearly. Don't Mail News.

[Thomas 'PointedEars' Lahn]

Dr J R Stockton wrote:

Gregor Kofler posted:

>Why would you need a captcha for "sign up" or "register" at all? Apart
from annoying the visitors of your webpage.

As a general remark : I find that which Google sometimes gives is often
hard to get right, whereas that which Wikipedia gives when a new URL is
entered in an article is easy to read. Presumably both are sufficiently
effective. I don't know whether, technically, they count as CAPCHAs.

Criteria for whether something counts as a *CAPTCHA* can be derived from the
meaning of the acronym: Completely Automated Public Turing test to tell
Computers and Humans Apart. Insofar any representation that is hard to
guess by a(n OCR) program counts as a CAPTCHA -- although the concept itself
is evidently flawed.

See also <http://en.wikipedia.org/wiki/CAPTCHA>
HTH

PointedEars
--
var bugRiddenCrashPronePieceOfJunk = (
navigator.userAgent.indexOf('MSIE 5') != -1
&& navigator.userAgent.indexOf('Mac') != -1
) // Plone, register_function.js:16

[Gregor Kofler]

Laser Lips meinte:

Check out my captcha to see a new concept of captch http://cylo.co.uk/CAPTCHA.html

Interesting. However, pitfalls like lack of activated JS or JS
compatibility remain.

>>* there are much less annyoing techniques, which are equally effective

Yeah I would agree with this too, ok point taken

A combination of honeypots, randomly generated field names, verification
via session variables, some simple content analysis (one could go for a
serious bayesian approach), a minimum time between delivery and
submission (no one fills out forms in 5 seconds).

All these measures are completely "invisible" and need no client-side
scripts.

Gregor
--
http://photo.gregorkofler.at ::: Landschafts- und Reisefotografie
http://web.gregorkofler.com ::: meine JS-Spielwiese
http://www.image2d.com ::: Bildagentur für den alpinen Raum

[Dr J R Stockton]

On Oct 16, 12:18*am, Thomas 'PointedEars' Lahn <[e-mail]>
wrote:

Dr J R Stockton wrote:

As a general remark : I find that which Google sometimes gives is often
hard to get right, whereas that which Wikipedia gives when a new URL is
entered in an article is easy to read. *Presumably both are sufficiently
effective. *I don't know whether, technically, they count as CAPCHAs.

Criteria for whether something counts as a *CAPTCHA* can ...

HTH

An impressively pointless response from the pointed one. Had I wanted
to know, or had it mattered, I would have looked it up. ISTM that you
behave like a badly-programmed AI - you really should see a good
psychiatrist or craniotomist.

--
(c) John Stockton, near London, UK. Posting with Google.
Mail: J.R.""""""""@physics.org or (better) via Home Page at
Web: <URL:http://www.merlyn.demon.co.uk/>
FAQish topics, acronyms, links, etc.; Date, Delphi, JavaScript, ....|