[jQuery] how to find out the browser your using with jquery and do a action?

[jQuery] how to find out the browser your using with jquery and do a action?

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FONT-SIZE: 10pt;
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<body><div style="text-align: left;">Hey,
i`m using a effect on tables which only seem to work in firefox.. so now i would like to make the effect browser dependent.. so if it`s firefox: use fade, if it`s any other browser (not gecko based) use another effect or don`t use any effect at all.
o btw.. why do my reply`s not appera in the "thread" that i started but as a new thread?
example how it should be:
|- my thread
|- - my thread
how it`s going now:
|- my thread
|- my thread
i`m using hotmail and i use the reply button.
Thanx.
Mark.
</div><br /><hr />Probeer Windows Live Mail als eerste uit. <a href='http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d' target='_new'>Windows Live Mail</a></body>
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