Hovering. Options

[xjeaniiex]

Click.
I looked at the code, script, whatever for this layout.
And I still couldn't get it, but do you see how in the left column
with all the navigation links? When you hover over it, the background
color changes to a white-ish color? I wanted to know how to do that.
I tried taking bits and pieces of the code and make it work in my stylesheet.
But it's not working. Can anyone help me?

Edit:
I am sooo ridiculously sorry.
But I kinda sorta figured it out?
I don't know, but this topic may be closed.
So sorry.