Question: How to Add Multilevel Drop Down Menu in Blogger?

As the number of playlists on this blog keeps growing, a navigation function is becoming more and more in need. I managed to add a single level menu, but after hours of googling and experimenting, I couldn't make a multilevel menu work properly. I don't know if the tutorial I used (1, 2) are outdated, or incompatible with my template.

If you know how these things work, would you please give me a few tips on how to add multilevel drop down menu to my Blogger template, or point me to a reliable tutorial? I hope to create the menu with pure CSS so the visitors don't have to load Java scripts from 3rd party sites. If you can help, please leave a comment or email me. Thank you.