This script sets the target of the Finder window to the
parent of the current target of the Finder window.
1. Paste this script in Script editor
2. Save it as an application - ~/scripts/finder/up.app
3. Drag and drop up.app onto the Finder widow toolbar.
@author Sandip V. Chitale
tell application "Finder"
set target of front window to (parent of target of front window)