js创建对象的方式

    工厂模式

    var lev =function(){

        return "hello world";

    };

    function Parent(){

         var child=new Object();

        child.name="孙悟空";

        child.age=400;

       child.lev=lev;

       return child;

    }

    var x =    Parent();

    alert(x.name); alert(x.lev());

    构造函数方式

    var lev=function(){

        return "hello,world";

    };

    function Parent(){

         this.name="孙悟空";

         this.age=400;

         this.lev=lev;

            }

        var x=new Parent();

        alter(x.name);alert(x.lev());

原型模式

var lev=function(){

     return "hello world";

};

function Parent(){};

Parent.Prototype.name="孙悟空";

Parent.prototype.age=400;

Parent.prototype.lev=lev;

var x=new Parent();

alert(x.lev());

混合构造函数

function Parent(){

     this.name="孙悟空"；

     this.age=400;

}

Parent.prototype.lev=function(){

             return this.name;

        }

    var x =new Parent();

    alert(x.lev());

    动态原型方式

    function Parent(){

        this.name="孙悟空";

        this.age=400;

    };

    if (typeof Parent._lev=="undefined"){

        Parent.prototype.lev=function(){

            return this.name;

        }

        Parent._lev=true;

    }

    var x=new Parent();

    alert(x.lev());

     json方式创建

    var Parent={

        name:"孙悟空",

        age:400,

        lev:function(){

            return "hello  world";

        }

    };

    alert(Parent.lev());