YAHOO.util.Event.addListener('clkVideo', 'click', function (e) { 
                                                      if (YAHOO.util.Dom.hasClass('videoPlayer', 'hideVideo'))  { 
                                                         YAHOO.util.Dom.replaceClass('videoPlayer', 'hideVideo', 'showVideo'); 
                                                         pageTracker._trackPageview('/click/LeadMBA/Testimonials'); 
                                                      } 
                                                      else
                                                         YAHOO.util.Dom.replaceClass('videoPlayer', 'showVideo', 'hideVideo'); 
                                                      
                                                   }
                );