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function Person() {
                this.id = 1;
                this.name = "OZKA";
                this.birthDate = new Date(1981, 01, 09);
                this.monthRevenue = 1000.750;
                this.developer = true;
            }

        
        var ozka = new Person();
        var jsonOzka = JSON.stringify(ozka);//{"id":1,"name":"OZKA","birthDate":"1981-02-08T20:00:00.000Z","monthRevenue":1000.75,"developer":true}
        
        var ozkaFromJson = JSON.parse(jsonOzka);
        
        alert(ozkaFromJson.id + ", " + ozkaFromJson.name + ", " + ozkaFromJson.birthDate + ", " + ozkaFromJson.monthRevenue + ", " + ozkaFromJson.developer);//