function makeProperty(o, name) {                  var value;                                    o["get" + name] = function() {                      return value;                  };                                    o["set" + name] = function(v) {                      value = v;                  };              }                            var o = {};                            makeProperty(o, "Name");                            o.setName("Frank");                                        alert(o.getName());                (function(o) {                  alert(1);                  for(a in o) {                      alert(a + " = " + o[a]);                  }              })(o);  這段代碼中的那個對象的value值在那里存放著，寫的測試代碼并沒有輸出出來，但是用o.getName()，卻可以得到！幫忙解答一下，不勝感激。