JS 给某个对象添加专属方法

function A(){this.name = "A";}a = new A();a.func = function(){alert(this.name);}a.func();                                                  //             func只有a对象能够使用。

function A(){this.name = "A";        this.func = function()      {alert(this.name);       }}a = new A();aa = newA();a.func();                                                 //           A的实例对象共享aa.func();                                               //          <span style="font-family: Arial, Helvetica, sans-serif;"> A的实例对象共享</span>