gistfile1.js

var Car = {
    init: function(){
        this.engine = "on";
    },
    engineToggle: function(){
        if (this.engine == "on") this.engine = "off";
        if (this.engine == "off") this.engine = "on";    
    },
    engineReportStatus: function(){
        console.log(this.engine);
    }
}

var ford = Object.create(Car);

ford.init();

ford.engineToggle();
ford.engineReportStatus(); // Reports its "on"

ford.engineToggle();
ford.engineReportStatus(); // Still reports "on"