Okay well if the password is stored inside a cookie it would be encrypted by a method defined by the website. To decrypt it you would have to know what form of encryption they used, possibly MD5.

With the amount of people attempting to "hack" into these sorts of websites these days it's unlikely those websites store password locally in that manner. They might simply have a session id stored inside a cookie that is also encrypted and thus would prove almost impossible to overcome.

A simple way to get a password to any person who doesn't know much about using computers put simply is to find out their password to some site they don't care about or even just their computer login, chances are they use the same password everywhere, that's also a note to people who do this, bad!

Well that's my *7.8 cents.