image showing blurred text on "forgot my password" pages?

[Timo]

How to achieve the blurred-text effect that "forgot my password" pages use?
User is asked to look at a picture of a word, and type it into INPUT box.
Thanks
Timo

 

[Brock Allen]

google for "captcha .net"

 

[Timo]

Excellent! Thanks.

google for "captcha .net"