Thread:Project:Support desk/MediaWiki expanded menu

Hello, I'm new in MediaWiki and i have a question about something that kills my time for a last 24 hours. MediaWiki default sidebar with expanding function. HOW can i do exact one that you have here guys.? I have article lets call it "Test" and inside it i have Test1 and Test2. I want my users clicking "Test" ant menu will auto expand...

PLEASE HELP!!!!