distorting gifs/jpeg images in HTML pages

[Mark]

Hi, I know this is the wrong group to post this message but I don't
know the right group.

What I want to know is when you have a HTML page that says "Enter the
text above and press accept connditions", and the text above says for
example "8su77dsf" but it is a gif and distorted and changes with each
page refresh, what is this distorted gif thing called. I want to put
one of these on my HTML pages but don't know what to search on in
Google to find some information on it.

Thank you
Mark

 

[Beauregard T. Shagnasty]

Hi, I know this is the wrong group to post this message but I don't
know the right group.

Good as any, I suppose.

What I want to know is when you have a HTML page that says "Enter the
text above and press accept connditions", and the text above says for
example "8su77dsf" but it is a gif and distorted and changes with
each page refresh, what is this distorted gif thing called. I want to
put one of these on my HTML pages but don't know what to search on in
Google to find some information on it.

http://www.google.com/search?hl=en&q=captcha