If you dont want to write your own may i suggest (proto fanboys dont scream 
blasphomy at me !!)

Its very very lightweight and very configurable (relies on jQuery)

Alex Mcauley
----- Original Message ----- 
From: "Chris" <>
To: "Prototype &" <>
Sent: Tuesday, July 21, 2009 11:25 PM
Subject: [Proto-Scripty] Re: Need help for performantly creating tooltips

> Ah, now I understand your problem with this word. When I wrote this I
> didnt know that this isnt even a "real" world for native english
> speakers. In Germany it is just one of those "it-words" that people
> are using all the time. I just translated this word, assuming that my
> english version of it would exist :)
> Ok, to ask the question again (without using the word performant or
> performance):
> If I have about 60 tooltips on page (that could load another subset of
> elements, that maybe have tooltips too), I would have about 120
> listeners (each tooltip needs at least a mouseover and one mouseout,
> right?). Is it the right way to just add two listeners (as in my
> example in my first post), which fire only on the elements I want?
> This would take the needed listeners from about 120 to only 2, which
> seems to be a really nice thing.
> But if I do it with only two listeners, every time something is
> hovered, it uses the findElement()-method to check for a tooltip. So
> what is faster and less memory consuming?
> Greetings from Germany,
> Chris
> >

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