???????????????


 <script type="text/javascript">            function load() {
                    var father = new Object();//??????????
                    var son = new Object();//?????????
                    father.name = function () {
                            alert('dad');//????dad
                    }
                    son.name = function () {
                            alert('son');//????son
                    }
                    son.name = father.name; //??????????????????????
                    father.name = function () {
                            alert('new dad'); //??д???????????new dad
                    }
                    father.name(); //???????????????
                    son.name();//??????????????
            }
            window.onload = load;//??load????????????????
    </script>


???????н????

?????????????

?????????????????father???????son??????father??name?“dad”??son??name?“son”?????father??name?????son?????????father??name?“new dad”?????father??name??????“new dad”?????????????????У??????son??name???“dad”????“new dad”??????????????????????????????????????????á?

???????????????????????????javascript?е??????У???????????ε????????????????????????????????????????????????