are you notified when someone/friend visits your Facebook wall?

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I am trying to solve a problem between my daughter and her daughter with regard to accessing Facebook. Is there a feature on Facebook account that allows you to be "notified" anytime someone LOGS ON to your account? Possibly a feature that works with an iPhone and anytime someone logs on to your facebook account it will ring the phone with a text saying "so and so has logged on to your Facebook" or" so and so just logged off your face book account" or something like that? I know that if you are on your own account on the PC there is that little thing in the corner that shows any of your friends that are logged on to their account at the same time so you can chat with those right then and there but that's not what I mean If you are a friend of someone, and you are on your wall and you click to their wall... you pop up on that "Friend on Chat" thing, but if your friend is not on their facebook at that time, you wouldn't see that, but is there a setting that you could connect to your iPhone and it would ring/text saying..."(your friend) just visited your wall" or "(your friend)is on facebook".... somethng like that? Just trying to solve a family problem. Personally, I think facebook is a breeding ground for relationship problems...as is starting here, so I dont' bother with it hardly at all...so I have to ask experts for help... Anyone have suggestions to solve the family problem?