So I’ve been building a section of a website using the YUI TabView and having some difficulty getting the beforeActiveTabChangeevent to work right.  Now I was using version 2.5.2 first, and in that version, this event doesn’t even fire.  So I tried using beforeActiveChange on the tab itself.  I could get this to fire, but returning false as the documents say to do, would not stop the event from continuing.  So I did some digging, and found a post somewhere out there – I’ve lost it now – saying that 2.6 fixed this problem.  Well I tried that for a little while, and found that in 2.6, TabView’s beforeActiveTabChange does indeed fire, but it has the same problem that beforeActiveChange had in 2.5.2 – returning false does nothing.

Well as you can imagine, I found this to be frustrating.  So I started doing a little more digging – had a post on the YUI Developer boards go unanswered, googled a bunch of things – and then stumbled on to the face that 2.7 had been released.  Well I tried using that – figuring what the heck – and it worked! beforeActiveTabChange stopped the tabs from changing if false was returned!  Hallelujah!  Now I haven’t tried to see if beforeActiveChange at the tab level works now or not, but I’m just so happy to have the TabView event work.