You cant get the size unless it has either A. Content inside it (which gives 
it a width and height by the browser or B. set the size with css / inline 
styling

HTH
Alex
----- Original Message ----- 
From: "serenobs" <seren...@gmail.com>
To: "Prototype & script.aculo.us" <prototype-scriptaculous@googlegroups.com>
Sent: Tuesday, June 30, 2009 9:40 PM
Subject: [Proto-Scripty] How to get size of div before showing?


>
> Hi.
>
> I'd like to know the size of div before showing.
> For example,
>
> .my {
>   position: absolute;
> }
>
> with this css, size is not determined yet.
> I want to place this div at center of viewport after calling
> Ajax.updater
> But I can get only initial size unless show element.
>
> How can I get right size?
>
> >
> 


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