Typo3:Select TS code based on browser

-------------<TS SETUP>----------------
[useragent = *MSIE*]
   # TS used for MSIE
[useragent = *Firefox/1.5.*]
   # TS used for Firexof 1.5.x
[else]
   # TS for other browsers
[end]
-------------</TS SETUP>----------------