Absolute link ?

I have an include file that has a script that will redirect to a page, this is part of the code:

        window.location.href = '../signout.asp';

Problem is that this include file is sometimes at the root level, sometimes included on page one or two levels up.
Also, this site is hosted in different domains, so I cant use an absolute link: http://www.domain.com/signout.asp

Is there a way to link to the root folder of the website then the page?  Something like:  'root/signout.asp' ?
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:

This should work

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AleksAuthor Commented:
Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
Glad I could help :-)
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