//第一种

 function Demo(){

     var obj=new Object();

     obj.name="Yubaba";

     obj.age=12;

     obj.firstF=function(){

     }

     obj.secondF=function(){

     }

     return obj;

 }

 var one=Demo();

 // 调用输出

 document.write(one.age);

 //第二种

 function Demo(){

     this.name="Yubaba";

     this.age=12;

     this.firstF=function(){

     }

     this.secondF=function(){

     }

 }

 var one=new Demo

 // 调用输出

 document.write(one.age);