Java腳本程序

Question

我剛剛開始，它非常令人困惑，因爲當我編寫代碼時，eclipse上沒有紅色警告，但是當我運行該程序時，它不起作用。問題是：

編寫一個程序，顯示員工ID和員工的姓名。使用班級

Answer 1

function Employee() { 
    var id; 
    var firstname; 
    var lastname; 
} 

Employee.prototype.display = function() { 
    console.log("Employee id = " + this.id + ", firstname = " + 
       this.firstname + ", lastname = " + this.lastname);     
} 

var newEmployee = new Employee; 

newEmployee.id = 1; 
newEmployee.firstname = "John"; 
newEmployee.lastname = "Doe"; 

newEmployee.display();