Real World XML

Creating Objects in JavaScript

As we already know, JavaScript comes with a number of built-in objects ready for you to use, such as the document, location, navigator, and history objects. JavaScript also comes with many classes built in, including classes such as the Date class, which handles dates and times, and the Math class, which has many built-in methods such as min and max to compare numbers. You can use built-in classes (and those you create yourself, although we're not going to do that here) to create objects using the new operator.

You can think of a class as an object's type because, using the new operator, you create objects from classes. Objects can have methods and properties built into them—in fact, most do. We'll be using the ...