Added FormTagHelper#image_submit_tag for making submit buttons that uses images

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1280 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Added FormTagHelper#image_submit_tag for making submit buttons that uses images
+
 * Added the option of specifying a RAILS_ASSET_HOST that will then be used by all the asset helpers. This enables you to easily offload static content like javascripts and images to a separate server tuned just for that.
 
 * Fixed action/fragment caching using the filestore when a directory and a file wanted to to use the same name. Now there's a .cache prefix that sidesteps the conflict #1188 [imbcmdth@hotmail.com]

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -79,6 +79,10 @@ module ActionView
         tag("input", { "type" => "submit", "name" => "submit", "value" => value }.update(convert_options(options)))
       end
       
+      def image_submit_tag(source, options = {})
+        tag("input", { "type" => "image", "src" => image_path(source) }.update(convert_options(options)))
+      end
+      
       private
         def convert_options(options)
           options = options.stringify_keys