I already know of :last-child. But is there a way to select the div:
a b
In CSS3 you have:
:nth-last-child(2)
See: https://developer.mozilla.org/en-US/docs/Web/CSS/:nth-last-child
nth-last-child Browser Support:
Chrome 2 Firefox 3.5 Opera 9.5, 10 Safari 3.1, 4 Internet Explorer 9