Msg box added and background image saving complete

app/controllers/desktop_controller.rb

@@ -42,6 +42,7 @@ class DesktopController< ApplicationController
     case @savewhat
     when "theme"
       @desktop.update_attributes(:theme => params["theme"])
+      @desktop.update_attributes(:wallpaper => nil)
     when "desktopnames"
       @sections = @desktop.sections
       x = 0;
@@ -64,6 +65,8 @@ class DesktopController< ApplicationController
       when "customtheme"
         @desktop.update_attributes(:theme => "custom")
         @desktop.update_attributes(:customtheme => params['theme'])
+      when "wallpaper"
+        @desktop.update_attributes(:wallpaper => params["wallpapernm"])
       end
      a = Array.new
      a << {"success"=>"true"}