ProtoCalendarを試す

これ
http://labs.spookies.jp/product/protocalendar

ヘルパーに仕込む　

      def date_field(object_name, method, options = {})
        result = text_field_for_date(object_name, method, options)
        styleId = options[:id] ? options[:id] : object_name.to_s + '_' + method.to_s
        contents = "InputCalendar.createOnLoaded('#{styleId}', {";
        lang = options[:lang] ? "lang:#{options[:lang]} " : "lang:'ja'"
        contents << lang
        contents << ", startYear:#{options[:startYear]} " if options[:startYear]
        contents << ", endYear:#{options[:endYear]} " if options[:endYear]
        contents << "});";
        return (result + javascript_tag(contents))
      end  

      protected  

      def text_field_for_date(object_name, method, options = {})
        tag = InstanceTag.new(object_name, method, self, nil, options.delete(:object))
        result = tag.value(tag.object)
        unless result.nil?
          time = result.strftime("%Y/%m/%d")
          tag.object.write_attribute(method, time) unless tag.nil?
        end
        return tag.to_input_field_tag("text", options)
      end

ビューに召喚呪文

<% content_for :html_header do -%>
<%= javascript_include_tag 'protocalendar/protocalendar' %>
<%= javascript_include_tag 'protocalendar/lang_ja' %>
<%= stylesheet_link_tag 'protocalendar/simple' %>
<% end -%>

フォームの中、書き換える

<%#= date_select(:hoge, :booked_day) %>
<%= date_field(:hoge, :booked_day) %>

firebug様がエラーを出す

calrndr.getPrevButton().observe is not a function
protocalendar.js (line 619)

うーん･･･
prototype.jsとかeffecs.jsを最新版とかにすると動くんだけど、autp_completeで被害が出る。困った困った･･･