Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.

Get tips for instantiating JavaScript's prototype-based objects two ways: via constructor functions or object initialization.

JavaScript Date object The Date object in JavaScript is the main element when it comes to handling date and time.

Image () object in JavaScript and pass it the URL of the image you want preloaded. Say we have an image called heavyimagefile.jpg, which we want to ...

Create a variable in the JavaScript tags to initialize an ActiveX object that can run commands through a command line: Add another line inside the script tags to run a desktop application.

Learn more about AJAX, a technique that uses JavaScript and the XMLHTTPRequest object to create faster and better interactive web apps.