gistfile1.txt

// Requires Function.prototype.bind
(function () {
    var chr = {
        name: "Christian"

        sleepAndGreet: function (callback) {
            setTimeout(function () {
                callback("Hi, I'm " + this.name);
            }.bind(this), 2000);
        }
    };

    chr.sleepAndGreet(function (greeting) {
        alert(greeting);
    });

    chr.name = "Chris Joh";

    // Alerts "Hi, I'm Chris Joh"
}());