Создание класса в отдельном файле

function Employee (name,surname,patronymic,position)
{
    this.name = name;
    this.surname = surname;
    this.patronymic = patronymic;
    this.position = position;
 
    this.getName = function()
    {
        return this.name;
    }
 
    this.setName = function(name)
    {
        this.name = name;
    }
 
    this.getSurname = function()
    {
        return this.surname();
    }
 
    this.setSurname = function(surname)
    {
         this.surname = surname;
    }
 
    this.getPatronymic = function()
    {
        return this.patronymic;
    }
 
    this.setPatronomic = function(patronymic)
    {
        this.patronymic = patronymic;
    }
 
    this.getPosition = function()
    {
        return this.position;
    }
 
    this.setPosition = function(position)
    {
        this.position = position;
    }
 
    Object.defineProperties(this,{
        name:{get:this.getName(), set:this.setName(name), enumerable:true},
        surname:{get:this.getSurname(), set:this.setSurname(surname), enumerable:true},
        patronymic:{get:this.getPatronymic(),set:this.setPatronomuc(patronymic), enumerable:true},
        position:{get:this.getPosition(), set:this.setPosition(position), enumerable:true}
    })
}

function Employee (name,surname,patronymic,position)
{
    this.name = name;
    this.surname = surname;
    this.patronymic = patronymic;
    this.position = position;
 
    this.getName = getName;
 
}
 
 function getName ()
{
    return this.name;
}

function Employee (name,surname,patronymic,position)
{
    
    var n = name, s = surname, p = patronymic, pos = position;
 
    this.getName = function() { return n; }
 
    this.setName = function(name) { n = name; }
    
    /* и дальше в таком же стиле */
 
}