User blog comment:DuoDynamo/Collapsible character boxes/@comment-9573-20140222002910

The idea is nice, although what you are suggesting can less be done with CSS rather than JavaScript (with the hide and show link)

If you want to stay inside the limitations of CSS, you could do things like show more on hovering over the box, although I think it's probably more useful to implement a hide/show link like in the example you provided.