@stof You made me realize that there is no `readOnly` DOM property for `select` elements (see [W3C documentation for selects](http://www.w3.org/html/wg/drafts/html/master/forms.html#the-select-element)) contrary to `input` elements (see [W3C documentation for inputs](http://www.w3.org/html/wg/drafts/html/master/forms.html#htmlinputelement)).

The `readonly` property on `select` elements seems to not be official and the `disabled` attribute should proabably be used along with a hidden field instead, although all major browsers (including IE8+) implement it.

Do you think this PR should still be merged or should it just be closed?