I have been using jQuery Multi Level CSS Menu #2 without problem.

Now I have a question that how to keep the 1st level item selected when drop down the 2nd level menu. For example, in the demo section of jQuery Multi Level CSS Menu #2, I would like the background of Folder 1 to keep being black when I mouse around the 2nd level menu of Sub Item 1.1, Sub Item 1.2....

Any help is highly appreciated.

Thank you.