It looks like you want to know which tab was selected, but using the method that you have, was selected earlier.
Just call ui.index if you want the item to be under ui.tab
$('#social_edit_pannels').tabs({ select: function(event, ui) { var theSelectedTab = ui.index; if (theSelectedTab == 0) { alert("0"); } else if (theSelectedTab == 1) { alert("1"); } } });
jsfiddle sample code.
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