a quick monkey patch for rails to be able to do 'f.text_field "email", :type => "email"' (though i guess f.email_field would be more appropriate but more code)

     module ActionView::Helpers
       class InstanceTag
         alias :orig_to_input_field_tag :to_input_field_tag
         def to_input_field_tag(field_type, options = {})
           orig_to_input_field_tag(options["type"] || field_type, options)
         end
       end
     end