Originally posted here by cacosapo
see another example bellow (attached html zipped)

Translation guide (html page is in portuguese)

"senha" means "password"

"abrir" means "open"

page is protected by a password --> eduardo

write password on field and hit "abrir"

you will see the result. Its a scrambled java script....
Yes and because it is Javascript any browsers that have Javascript disabled will not be able to use this page. If you want a secure page then I recommend you learn a server side language like PHP and also learn Mysql and create password protected pages that way instead of putting the protected information right in the document itself.

Also I think they mean that it is only good for home security because most home computer users who just get on the internet to check email, use instant messenger things like that wouldn't know how to get passed that Javascript.