<script>
            var myphone = {
                make : "Apple" ,
                model : "Iphone 4" ,
                warrenty : 12 ,
                color : "white" ,
            };
            window.console.log(myphone);
            delete myphone.warrenty;
            window.console.log(myphone);
            window.console.log(myphone.model);
            var myotherphone = myphone;
            window.console.log(myotherphone);
            myotherphone.model = "Iphone 5";
            window.console.log(myotherphone);
            window.console.log(myphone);
        </script>