运用JAVASCRIPT，写一个类

js编写类：

        //test
        function student()
        {
            this.name="name";
            this.num="num";
            this.gender="gender";
        }
        student.prototype.set_name=function(name){
            this.name=name;
        }
        student.prototype.set_num=function(num){
            this.num = num;
        }
        student.prototype.set_gender=function(gender){
            this.gender=gender;
        }
        student.prototype.get_name=function(){
            return this.name;
        }
        student.prototype.get_num= function(){
            return this.num;
        }
        student.prototype.get_gender=function(){
            return this.gender;
        }
        
        function test()
        {
            var s = new student();
            //s.name="abc";
            //s.num='111';
            //s.gender="female";
            
            s.set_name("s_name");
            s.set_num("s_num");
            s.set_gender("s_gender");
            
            alert(s.get_name());
            alert(s.get_num());
            alert(s.get_gender());
            
            //or
            //alert(s.name);
            //alert(s.num);
            //alert(s.gender);
        }

或者：

        //test1
        function employee(name,age,born)
        {
            this._name = name;
            this._age = age;
            this._born = born;
            this.ShowMessage=function(msg){
                alert(msg);
            };
        }
        
        function test1()
        {
            var emp = new employee("name","age","born");
            employee.prototype.gender = "gender";
            employee.prototype.msg=function(a)
            {
                alert("sssss");
            }
            emp.gender = "female";
            alert(emp.gender);
            alert(emp._name);
            emp.ShowMessage("m");
            emp.msg('1');
        }