工厂模式：用函数封装以特定接口创建对象；

/*函数封装*/function createPerson(name,age,job){      var o = new Object();            o.name = name;            o.age = age;            o.job = job;            o.sayName = function(){                  alert(this.name);            };           return o;    }var person1 = createPerson("wsc",25,"software Engineer");var person2 = createPerson("yl",26,"Doctor");

工厂模式解决的问题：相似对象的问题；没有解决的问题是对象识别的问题；