From W3C specification point of view it's not valid to use `:checked` for select elements. See [here] (http://www.w3.org/TR/selectors/#checked). But Chrome and Firefox supports this for select element as well. See [here] (https://developer.mozilla.org/en/docs/CSS/:checked). As this is CSS3 selector it will not work for some old browser versions (like MSIE8), but I expect that we don't care about this limitation, otherwise we need to refactor some other code in project to get rid of CSS3 selectors.