<1>  关于JS类可以通过以下的方式去定义JS的列

  var Studentlei=function Student_fun_lei(var Name,var Age,var Sex,Var Code){

        this.Name=Name;

        this.Age=Age;

        this.Sex=Sex;

        this.Code=Code;

   }

//实例化一个类

      function shili(){

       Var StudentDuiXiang=new Studentlei("zhangsan","24","nan","001");

        alert(StudentDuiXiang.Name);

        //通过对象名加.就可以访问对象里面的属性了

     }

 

(2)关于JS的继承:

 

 

     function Animal(var Name){

         this.Name=Name;

          this.eat=function(){

              alert(Name+"吃");

           }

     }

        //继承对象

           function Cat(){

            Animal.call(this,"mao");

          }