Page Labels

I want to add the Page Label to all my pages in every activity. On the System PAGE in the System Activity I added a panel with a generic label . I tagged it "PNX" . On each page I use this script.

CF.widget("PNX","PS_SYSTEM","PS_SYSTEM").label = CF.page().label ;

This Works , but there are a lot of individual pages to add this line to. Is there a way to do this on the Activity level ?