Background Images Lazy loading ^

Hello, I have observed that lazy loading in Speed cache does not allow loading of images background,

I see that there are lazy loading that allow loading images in background-image css?

jQuery Lazy - Example: Load Background Images

http://jquery.eisbehr.de/lazy/example_load-background-images

I see that jQuery.Lazy loading of images is done in a very pleasing to the eye, I think the best Lazy loading I have seen, since there are no visual effects in the loading it's fine!,

jQuery Lazy - Example: Heavy Usage300 images

http://jquery.eisbehr.de/lazy/example_heavy-usage


Thanks,