how to use js to do inheritance of OOD

javascript_subclass

function Person(name)
{
  this.name = name;
}

Person.prototype.toString = function() {
	return "Person(name: " + this.name + ")";
}

function Employee(name, salary)
{
	Person.call(this, name);
	this.salary = salary;
}

Employee.prototype = new Person();
Employee.prototype.toString = function() {
	return "Employee(name: " + this.name + " Salary: " + this.salary + ")";
}

var p1 = new Person("henry");
var p2 = new Person("helen");
print(p1);
print(p2);

var e = new Employee("Johnny", 50000);
print(e);