Shoutbox

I'm trying to make a script that closes the conversation-window when a contact signs out.

The code I have now:

code:

---

function OnEvent_ContactSignout(Email){
    var contact=Messenger.MyContacts.GetContact(Email);
    var chats = Messenger.CurrentChats;
        var e = new Enumerator(contacts);
        for(; !e.atEnd(); e.moveNext()){
            var chat = e.item();
            var contact1=chat.Contacts
            if(contact==contact1){
                chat.Close();
            }
        }
}

---

But, this doesn't work. What is wrong in this script, or what script can I use to close the conversation window of the person that signs out?