Expanding/collapsing javascript menu

In this post I’ll show you how to create an expanding/collapsing menu like Slashdot left menu used to be, using the YUI library and Dav Glass YUI effects widget.
Preview of the script we are going to build.
The HTML markup for our menu is :
 <div id="menu"><h1 id="menu-title">Menu</h1><div id="menu-links"><ul><li>Home</li><li>About</li><li>CSS</li></ul></div></div> 
We use 2 div tags, one for holding the [...]