<% link_to(map_blog_entries_path, :title => "クチコミマップ") do %>
  <%= theme_image_tag "blog/map_tab.gif",
        :alt => "クチコミマップ",
        :onmouseover => "this.src=#{theme_image_path('blog/map_tab_2.gif').to_json}",
        :onmouseout => "this.src=#{theme_image_path('blog/map_tab.gif').to_json}"
  %>
<% end %>
