[nerv_]

var x = 3;

var foo = {
    x: 2,
    baz: {
        x: 1,
        bar: function() {
            alert(showThis.call(this));
            return this.x;
        }
    }
};

var go = foo.baz.bar;

function showThis() {
    return this === window ? '[object global]' : JSON.stringify(this);
}


go();
foo.baz.bar();