[TYPO3] Safely adding JavaScript onload or onresize events in Typo3

[Cyprian Kowalczyk]

Hello,

I've been wondering if there is any safe way to add JavaScript onload or  
onresize events in Typo3.
What I mean by 'safe way'.
So imagine I'd like to add some JS functions to execute on page load, but  
there may be some other functions defined by extensions or templates,  
right?
So, how to solve it, maybe I missed something.
Thank you for any hints in advance.

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regards, Cyprian
pi2.pl ~ π^2 design project