subregion_select should support setting a prompt

[jim]

See also.

[rdsoze]

An include_blank works with subregion_select ..
Edit: prompt also works :P

 <%= f.subregion_select(:state, 'US', :prompt => "Select if applicable" ) %>

If you had anything else in mind, I would definitely take a stub at it ..

[peng-zuo]

i think jim meant subregion_select_tag and country_select_tag, the html_options is not included in these methods.