Putting password in the cookie?

[mjvndhsb]

I've been starting to learn how to use cookies, and the example script I've been using checks the username and password against the database, but only set the username in the cookie. Couldn't somebody just go in and change the cookie to anybodies' username? Or am I wrong on that? So would the solution be to add their password into the cookie too? Or does that have risks I havent noticed?

I'm not looking for hacker-proof just yet, I don't want it to be as easy as just changing the username in the cookie.