[jQuery] .height() issue

[jQuery] .height() issue

Hi,
i use the following code to set up the height of a div (framework):
<blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote">var GridTitle_OuterHeight = parseInt($("#gridtitle").outerHeight(),10);
var Navigation_OuterHeight =  parseInt($("#navigation").outerHeight(),10);
var FrmBottomBorder =  parseInt($("#framework").css("borderBottomWidth"), 10);
var FrmTopBorder = parseInt($("#framework").css("borderTopWidth"), 10);
... </blockquote><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote">...
$("#framework").height(op.height - GridTitle_OuterHeight - FrmTopBorder - FrmBottomBorder - Navigation_OuterHeight);<br clear="all">
</blockquote>
with op.height = 300.
when i user an alert() just after all vars but before the $("#framework").height(..) as following:
alert("Op height : "+op.height + "\n\nGridTitle outer height : " + GridTitle_OuterHeight + "\n\nNavigation height : " + Navigation_OuterHeight);
it works correctly and returns me the good values.
however, the $("#framework").height(...) does not work under IE7, why ?
when i wrote it does not work, in fact, it does not setup the height of the Framework div to the correct height, but to the default one :-(
any idea ?
thx.
--
Alain
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