[Typo3] Add css with ts on a single page

[Vlatko Šurlan]

Mathias Schreiber [wmdb] wrote:
> [globalVar = TSFE:id = 10]
> page.headerData.5 = TEXT
> page.headerData.5.value (
> <style>
> body {
>     font-size:2000em;
> }
> )
> [end]
> 
> Get the point?

This is exactly what I wanted. One more question. How can I make sure I 
do not overwrite something in page.headerData? Or in other words how do 
I make sure page.headerData.5 is not used already?