Vertical Slidng Tabs

1

I would like to make a navigation system that has about 5 buttons, but when you put your mouse over a button some sublinks slide out fom underneath forcing the other buttons to slide down aswell. Similar to the stuff in this post: http://www.kirupaforum.com/forums/showthread.php?s=&threadid=41415&highlight=smart+navigation. I want the tab to stay open as long as the mouse is over one of the sublinks or the actual button itself. Thanks in advance for anyhelp.