function entriesIntersect(entry1, entry2)
        {
            var start1 = timelineData.entryStartTimes[entry1];
            var start2 = timelineData.entryStartTimes[entry2];
            var end1 = start1 + timelineData.entryTotalTimes[entry1];
            var end2 = start2 + timelineData.entryTotalTimes[entry2];
            return start1 < end2 && start2 < end1;
        }
@param {number} entry1
@param {number} entry2
@return {boolean}