Can anyone figure this one out?????

I need to add a left nav to my site similar to the one on this:

http://ariba.com/solutions/solutions_overview.cfm

The only one I found close was this menu by :
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Cool Table Menu
By Clarence Eldefors (http://www.freebox.com/cereweb) with modifications from javascriptkit.com
Visit http://javascriptkit.com for this and over 400+ other scripts

Test sample:
http://www.javascriptkit.com/script/...coolmenu.shtml
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The issue:

I need it to change color on hover (which the script above does just fine) but... I need the hover color to remain "on" once the link is clicked
- Just like the ariba.com site mentioned at the top of this message

Can anyone help me with this?