Serving different images for different screen sizes

We have our images resizing nicely and we now understand how we can limit the display size of specific images should we choose to. However, earlier in the chapter we noted the inherent problem with scaling images. They must be physically larger than they are displayed in order to render well. If they aren't, they start to look a mess. Because of this, images, in terms of file size, are almost always bigger than they need to be given the likely display size.

Various people have tackled the problem, attempting to provide smaller images to smaller screens. The first notable example was the Filament Group's "Responsive Images" (http://filamentgroup.com/lab/responsive_images_experimenting_with_context_aware_image_sizing/). However, recently, I've switched to Matt Wilcox's "Adaptive Images" (http://adaptive-images.com). The Filament Group's solution required the image related markup to be altered. Matt's solution doesn't and automatically creates...