Fix for issue jquery-archive#3416 - getTopOffset() should subtract scrollTop not add it.

- Modified private utility function getTopOffset() so that it subracts scrollTop from top instead of adding it.

Author: jblas

js/jquery.mobile.fixHeaderFooter.js

@@ -200,7 +200,7 @@ $.mobile.fixedToolbars = (function() {
 			top = ele.offsetTop;
 
 			while ( ele && ele != body ) {
-				top += ele.scrollTop || 0;
+				top -= ele.scrollTop || 0;
 
 				if ( ele == op ) {
 					top += op.offsetTop;