OK, I think I get you now...
If your goal is to apply a distinct style to
the currently active menu item AND its parent items, you can take advantage of what I wrote above....WF will automatically assign the class="active" to the currently active menu item and its parent items all the way up the document tree. All you will need to do is to create a CSS style for this.
e.g
CODE EDITED FOR ERROR
This class "active" is the default value of the WF class parameter called
&hereClass. If you want to use a different name you can add this to your WF call, e.g.
[[Wayfinder? &startId=`0` &hereClass=`current`]
If on the other hand you want to apply a distinctive style
to ONLY the currently active menu item, you can use the
&selfClass. So, you would do something like
[[Wayfinder? &startId=`0` &selfClass=`current`]
Then in your CSS
CODE EDITED FOR ERROR
So you do not have to use the "body.Home" method.
Hope this helps
/k