jquery_scroll_menu.rb

require_jquery

add_footer_proc do |date|
JQUERY_CODE=<<EOJ
        <script type="text/javascript">
        $(function() {
            $(window).scroll(function(){
               var scrollTop = $(window).scrollTop();
               if(scrollTop != 0)
                  $('#adminmenu').stop().animate({'opacity':'0.2'},400);
               else  
                  $('#adminmenu').stop().animate({'opacity':'1'},400);
               }
            );
            $('.adminmenu').hover(
               // first argument
               function (e) {
                  var scrollTop = $(window).scrollTop();
                  if(scrollTop != 0){
                     $('#adminmenu').stop().animate({'opacity':'1'  },400);
                  }
               },
               // second argument
               function (e) {
                  var scrollTop = $(window).scrollTop();
                  if(scrollTop != 0){
                     $('#adminmenu').stop().animate({'opacity':'0.2'},400);
                  }
               }
            );
        });
        </script>
EOJ
end

if /\A(?:latest|day|month|nyear)\z/ =~ @mode
   def navi
      result = %Q[<div class="adminmenu" id="adminmenu">\n]
      result << navi_user
      result << navi_admin
      result << calendar
      result << %Q[<span class="adminmenu"><a href="index.rdf"><img style="border-width: 0px;" src="/d/img/rss.png" alt="RSS feed"></a></span>]
      result << %Q[</div>]
      result << %Q[</div>\n]
   end
end