How make a tab hidden when a different tab clicked ??

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From: David (wherever_at_thereisanemail.com)
Date: 03/12/04 

Date: Fri, 12 Mar 2004 10:56:08 -0800

I want to make a tab disappear when I click on a different tab.
I tried the 'on click' event but that only works if I click on the tab then click again on the tabbed area.
Someone suggested the 'on change' event but there is no 'on change' event for a tab.