R help - Apr 2005 - fBasics question: Get dates corresponding to maximum values

fBasics question: Get maximum dates

Hello,

This two series data set has been created with the timeSeries() function 
from fBasics
>str(total)
Formal class 'timeSeries' [package "fBasics"] with 7 slots
  ..@ Data         : num [1:262, 1:2] 8703 8603 8573 8680 8668 ...
  .. ..- attr(*, "dimnames")=List of 2
  .. .. ..$ : chr [1:262] "2004-04-19 01:00:00" "2004-04-20
01:00:00"
"2004-04-21 01:00:00" "2004-04-22 01:00:00" ...
  .. .. ..$ : chr [1:2] "TS.1" "TS.2"
  ..@ positions    : chr [1:262] "2004-04-19 01:00:00"
"2004-04-20 01:00:00"
"2004-04-21 01:00:00" "2004-04-22 01:00:00" ...
  ..@ format       : chr "%Y-%m-%d %H:%M:%S"
  ..@ FinCenter    : chr "London"
  ..@ units        : chr [1:2] "TS.1" "TS.2"
  ..@ title        : chr "Time Series Object"
  ..@ documentation: chr "Created at London 2005-04-22 12:54:36"

Here are the first three lines:
>total[1:3,]
                       TS.1  TS.2
2004-04-19 01:00:00 8702.82 55.18
2004-04-20 01:00:00 8602.98 48.48
2004-04-21 01:00:00 8573.05 46.65

I managed to get the maximum for each series:
>maxima<-c(max(total at Data[,1]), max(total at Data[,2]))
>maxima
[1] 9927.20   83.11

But now, I'd like to get the CORRESPONDING DATES  for these maxima.

Another question, is there a way to refer to data as TS.1 or TS.2 in 
function instead of  total at Data[,1:2]?

Thanks
>version
         _
platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
status
major    2
minor    1.0
year     2005
month    04
day      18
language R