Are you using an image element to support printing? There's no other reasons to not use CSS3 to create the dot (or the somewhat more pragmatic approach of setti

Are you using an image element to support printing? There's no other reasons to not use CSS3 to create the dot (or the somewhat more pragmatic approach of setting it as a background image on the target element, reducing your markup), as I see it? I think you should also expect that people could want more than one target on their maps. There's no downside to switching from IDs to classes here.