add: var retval = false;  
context:       onStreamComplete: function(loader, ctxt, status, resultLength, result)      {         window.setCursor( "default" );                  //check to make sure its actually a calendar file, if not return.         if( result.indexOf( "BEGIN:VCALENDAR" ) == -1 )         {            alert( "This doesn't appear to be a valid file. Here's what I got back from\n"+Channel.URI.spec+":\nResult:"+result );            return false;         }         //if we have only one event, open the event dialog.         var BeginEventText = "BEGIN:VEVENT";         var firstMatchLocation = result.indexOf( BeginEventText );         if( firstMatchLocation == -1 )         {            alert( "There are no events in this file. Here's what I got from\n"+Channel.URI.spec+"\nResult: "+result );            return false;         }         else         {            onResponse( result );         }         return true;      }
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/f3a33c3cca536da5507c55ad2cd51419421a6e2a/calendarManager.js/buggy/calendar/resources/content/calendarManager.js