link_image_to (ActionView::Helpers::UrlHelper)

    # File lib/action_view/helpers/url_helper.rb, line 130
          def link_image_to(src, options = {}, html_options = {}, *parameters_for_method_reference)
            image_options = { "src" => src.include?("/") ? src : "/images/#{src}" }
            image_options["src"] += ".png" unless image_options["src"].include?(".")

            html_options = html_options.stringify_keys
            if html_options["alt"]
              image_options["alt"] = html_options["alt"]
              html_options.delete "alt"
            else
              image_options["alt"] = src.split("/").last.split(".").first.capitalize
            end

            if html_options["size"]
              image_options["width"], image_options["height"] = html_options["size"].split("x")
              html_options.delete "size"
            end

            if html_options["border"]
              image_options["border"] = html_options["border"]
              html_options.delete "border"
            end

            if html_options["align"]
              image_options["align"] = html_options["align"]
              html_options.delete "align"
            end

            link_to(tag("img", image_options), options, html_options, *parameters_for_method_reference)
          end