add: alert( "Timeline was unable to retrieve data from the server, please try again later..." ); 
context:     failure: function( o )    {        YAHOO.timeline.slider.toogleProgressBar();    }
meta: 3773	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3773/590e497dbe583a4dd1c8f80f4a072d0a48b5093a/timeline.js/clean/design/ezflow/javascript/timeline/timeline.js