No, they can't.

Interlocking framework

Works as described in the introduction - the expressions for IE are listed below:

#sidebar-left
    {
    height: expression(document.body.clientHeight- (100 + 5) + "px");
    }
#sidebar-right
    {
    height: expression(document.body.clientHeight- (120 + 5) + "px");
    }
#content
    {
    height: expression(document.body.clientHeight - (100 + 120 + (2 * 5)) + "px");
    width: expression(document.body.clientWidth - (150 + 300 + (2 * 5)) + "px");
    }
/* mysterious -5px required to compensate for the scrollbar's presence - or something. other values may be necessary in different situations */
#header
    {
    width: expression(document.body.clientWidth - (150 + (2 * 5) - 5) + "px");
    }
#footer
    {
    width: expression(document.body.clientWidth - (300 + (2 * 5) - 5) + "px");
    }

A mysterious 5 pixels must be added to the horizontal widths in IE - mysterious because it's not in any way obviously related to the scrollbar width (and why should it be?)

Interlocking Compatibility

Works in IE6, IE5.5, IE5.01, Firefox 0.8, Mozilla 1.6, Safari 1.1, Opera 7.5, Opera 7.23

Degrades acceptably in Mac IE5

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END CONTENT