That goes into javacscript coding....
I would start at looking into sdk/scripts/popup.js: function alert_banner(..)
to understand how normal special _handlings gets displayed.
You are able to access the alias value "form" specific by :
detail_cnt : "$args.alias"
detail_in : "$args.customer.alias" (the faffected user)
Hope this helps a bit....
Regards
..........Michael