javascript set a style as !important without relying in changing the className

How can I set a style as "!important" using javascript without relying in changing the className and doing it that way?
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Michel PlungjanIT ExpertCommented:
does not seem to be possible or even a good idea
Why not change className?
sggexchangeAuthor Commented:
I don't want to use the className approach because I want to change font-size and line-height passing a variable.
You will have to change the style inline, I don't think you can change the CSS in the <head> with javascript, can you Michel?  Anyway, to change an inline style, it is fairly easy --

document.getElementById('elName').style.display="inline !important";

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Michel PlungjanIT ExpertCommented:
I think you can actually. I do not have a link at hand
Did anyone ever figured this out?
David S.Commented:
Did scrathcyboy's suggestion not work for you?
I found a way to do this. Use the cssText property of objects. For instance:

myElement.cssText = "inline !important";

cssText allows you to set a whole string with the style.
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