Untitled

<html>
<script>
    var isNorm=true;
    var date=new Date();
    class User {
        constructor(name, surname) {
            this.name = name;
            this.surname = surname;
        }
        getInfo() {
            if(this.isNorm)
                return this.name + ' ' + this.surname;
            else
                return "Студент не числится"
        }
    }
    class Student extends User{
        constructor(name, surname,year=date.getFullYear()) {
            super(name,surname);
            this.year=year;
            this.isNorm = arguments.length !== 2;
        }
        enroll() {
            if (!this.isNorm){
            this.isNorm=true;
            }else
                throw "Уже зачислен";
        }
        expel(){
            this.isNorm=false;
        }
        GetCurse() {
            var a =date.getFullYear(parseInt())-this.year;
            if(this.isNorm&&a<=6)
                return a+1;
            else
                return "Студент не числится"
        }
        getInfo() {
            if(this.isNorm)
                return this.name + ' ' + this.surname+ ' Студент '+this.GetCurse()+" курса";
            else
                return "Студент не числится"
        }
    }
    var student =  new Student("Жека","Ахмедов");


    console.log(student.getInfo());
</script>
</html>