Edit in JSFiddle

var friends={
    bill:{
        firstName: "Bill",
        lastName:"Gates",
        number:"(206) 555-5555",
        address:['One Microsoft Way','Redmond','WA','98052']
    },
    steve:{
        firstName: "Steve",
        lastName:"Jobs",
        number:"(206) 555-5555",
        address:['One Microsoft Way','Redmond','WA','98052']
    }
};

var name;
var text="";
var list = function (friends) {
    for (name in friends){
        console.log(name);
    }
}

var search = function(name){
    for(var key in friends){
        if(friends[key].firstName===name){
            console.log(friends[key]);
            return friends[key];
        }
    }
}