From 1c05273289c16f41fc8a9fa43cfc19577a6efa84 Mon Sep 17 00:00:00 2001
From: "mostafah%oeone.com" <mostafah%oeone.com>
Date: Tue, 22 Jun 2004 15:53:32 +0000
Subject: [PATCH] Checked in patch for bug 247864

---
 calendar/resources/content/calendarEvent.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/calendar/resources/content/calendarEvent.js b/calendar/resources/content/calendarEvent.js
index e7a1204d099a..7cb6a3ba9710 100644
--- a/calendar/resources/content/calendarEvent.js
+++ b/calendar/resources/content/calendarEvent.js
@@ -575,15 +575,18 @@ CalendarEventDataSource.prototype.orderToDosByDueDate = function calEvent_orderT
 CalendarEventDataSource.prototype.orderEventsByDisplayDate = function calEvent_orderEventsByDisplayDate( eventA, eventB )
 {
    var r=eventA.displayDate - eventB.displayDate;
-   if (r==0)
-   {
-      if ( eventA.title < eventB.title ) r=-1;
-      if ( eventA.title > eventB.title ) r=1;
+   if (r==0) {
+     var titleA = eventTitleOrEmpty(eventA);
+     var titleB = eventTitleOrEmpty(eventB);
+     return ( titleA < titleB ? -1 : 
+              titleA > titleB ?  1 : 0);
    }
-  
    return(r);
 }
 
+function eventTitleOrEmpty(event) {
+  return ("title" in event && event.title != null) ? event.title : "";
+}
 
 /** PACKAGE STATIC
 *   CalendarEvent orderRawEventsByDate.