[jquery] jQuery - trapping tab select event

I'm a jQuery noob and I'm trying to figure out how to trap the tab selected event. Using jQuery 1.2.3 and corresponding jQuery UI tabs (not my choice and I have no control over it). It's a nested tab with the first level div name - tabs. This is how I initialized the tabs

$(function() {
       $('#tabs ul').tabs();

    $('#tabs ul').tabs('select', 0); 

I'm not able to figure out how to trap any of the events or properties (selected tab, when tab clicked, etc). Would appreciate any help on this...

I tried things like:

$('#tabs ul').bind('tabsselect', function(event, ui) {
    selectedTab = ui.index;
    alert('selectedTab : ' + selectedTab);


$('#tabs').bind('tabsselect', function(event, ui) {

with no success.

Below is the markup

<div id="tabs">
    <LI><A href="#fragment-1"><SPAN>Tab1</SPAN></A></LI>
    <LI><A href="#fragment-2"><SPAN>Tab2</SPAN></A></LI>
    <LI><A href="#fragment-3"><SPAN>Tab3</SPAN></A></LI>
    <LI><A href="#fragment-4"><SPAN>Tab4</SPAN></A></LI>

<DIV id=fragment-1>
    <LI><A href="#fragment-1a"><SPAN>Sub-Tab1</SPAN></A></LI>
    <LI><A href="#fragment-1b"><SPAN>Sub-Tab2</SPAN></A></LI>
    <LI><A href="#fragment-1c"><SPAN>Sub-Tab3</SPAN></A></LI>


This question is related to jquery jquery-ui jquery-ui-tabs

The answer is

it seems the old's version's of jquery ui don't support select event anymore.

This code will work with new versions:

                    activate: function(event ,ui){

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