In regards to multiple arrays in an object. For instance, you want to record modules for different courses
var course = {
InfoTech:["Information Systems","Internet Programming","Software Eng"],
BusComm:["Commercial Law","Accounting","Financial Mng"],
Tourism:["Travel Destination","Travel Services","Customer Mng"]
};
console.log(course.Tourism[1]);
console.log(course.BusComm);
console.log(course.InfoTech);