The blur event is triggered when a menu item loses focus. You can use this event to track which item has lost focus. An item can lose focus through keyboard commands, such as when the Tab key is pressed, or when a user clicks elsewhere on the page.

var instance; // Type: options
instance.blur = function(e, data) { };

blur = function ( 
   e : jQuery.Event,
   data : IBlurEventArgs
) { };