function createView(obj, propList) {

        var proxy = {};     

        for (var propIndex in propList) {    

             var prop=propList[propIndex];

             Object.defineProperty(proxy, prop, 

                    {  enumerable : true , 

                       get : getter.bind(obj,prop), 

                       set : setter.bind(obj,prop)   } );

        }    

      return proxy;

    }

​

    function getter(prop) { return this[prop] ; }

​

    function setter(prop, value) { return this[prop] = value ; }

​

​

var myObj={

    p1:123,

    p2:321,

    p3:{p3_1:1231,p3_2:342},

    p4:'23423',

    p99:{p99_1:'sadf',p99_2:234},

    p100:3434

};

​

var objView = createView(myObj, ['p1', 'p2', 'p100']);

​

console.log('on objView, p1:' + objView.p1 + ' p2:' + objView.p2 + ' p100:' +objView.p100 + ' and p4 (not in view) is : ' + objView.p4 );

​

console.log('modifiying, on the view,  p1 to 1000 and p2 to hello ')

objView.p1 = 1000;

objView.p2 = 'hello';

​

console.log('on objView, p1:' + objView.p1 + ' p2:' + objView.p2 + ' p100:' +objView.p100 + ' and p4 (not in view) is : ' + objView.p4 );

​

console.log('modifiying, on the viewed object,  p1 to 200 and p2 to bye ')

​

myObj.p1 = 200;

myObj.p2 = 'bye';

​

console.log('on objView, p1:' + objView.p1 + ' p2:' + objView.p2 + ' p100:' +objView.p100 + ' and p4 (not in view) is : ' + objView.p4 );

​

​

​

​

​