In the previous lesson, I showed you how to do a simple image rollover. In the real world, however, it’s rare that you’ll ever have one rollover on a page. In this column, I’ll show you how ...

Its seems simple—Websites should serve the right image to the right screen, high-resolution images to high-resolution devices and low res to the rest. But of course it’s not that simple.

JavaScript is a programming language used to make websites interactive and dynamic. Features such as buttons that respond to ...