- // Safari doubles body offsets with an absolutely positioned element or parent
- if ( safari && absolute )
- add( -doc.body.offsetLeft, -doc.body.offsetTop );
+ // Safari <= 2 doubles body offsets with a fixed position element/offsetParent or absolutely positioned offsetChild
+ // Mozilla doubles body offsets with a non-absolutely positioned offsetChild
+ if ( (safari2 && (fixed || jQuery.css(offsetChild, "position") == "absolute")) ||
+ (mozilla && jQuery.css(offsetChild, "position") != "absolute") )
+ add( -doc.body.offsetLeft, -doc.body.offsetTop );
+
+ // Add the document scroll offsets if position is fixed
+ if ( fixed )
+ add(Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+ Math.max(doc.documentElement.scrollTop, doc.body.scrollTop));