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Image () object, thus preloading it into the cache. The onLoad () event handler Like many other objects in JavaScript, the Image () object also comes with some event handlers.
This line checks to see if the user’s browser will understand the image object, which means that it has the ability to manipulate images via JavaScript (which is what we’re trying to accomplish).
The most commonly used JavaScript effect on the Web is the image rollover. For the one person with access to the Web who’s never seen one before, an image rollover happens when you move your ...