Note IE only test.
Issue: When certain doctypes are used, IE6/windows and IE5/Mac
will switch out of "quirks" mode, into "strict" mode. This means some elements will
be rendered in a different way.
(More info on this : http://www.richardinfo.com/case_studies/doctypes.html )
It seems IE6 in strict mode returns a wrong value for document.body.clientHeight.
What we want to know is how IE5/Mac does this in strict mode.
If the alert showed something like this:
document.body.clientHeight = 253
document.compatMode = CSS1Compat
document.documentElement.clientHeight = 595
then the browser is in strict mode, and reacting like IE6/Win.
Test results here please
[#477798]