gistfile1.js

 _gaq.push(['_setCustomVar',
      1,                   // This custom var is set to slot #1.  Required parameter.
      'Items Removed',     // The name acts as a kind of category for the user activity.  Required parameter.
      'Yes',               // This value of the custom variable.  Required parameter.
      2                    // Sets the scope to session-level.  Optional parameter.
   ]);
 _gaq.push(['_trackEvent',
      'Shopping', // category of activity
      'Item Removal', // Action
   ]);