add nokogiri into Gemfile and fixing dup bug again...

app/assets/javascripts/design_temp.js

@@ -15,7 +15,7 @@ function r_editor(tgetUrl,tpostUrl,tfilename,toption){
     html = $(code);
     html.children("textarea").load(editor.getUrl);
     html.children("input.discard").click(function(){
-      editor.reload();
+      editor.destroy();
     });
     html.children("input.send").click(function(){
       editor.send();