The image probably isn't loaded by that time. I mean, it's probably a couple milliseconds, if that, between when you assign that src and when you ask for the width and height. Assign the image an ...

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 ...

When the DOM is ready, javascript replaces those links with links to optimized gallery pages. Around July-August, full version images started dropping from Google Images results.