B iframe 2
go(-2) [IE8, FF3.6, Opera10 will load 'Top level page A/A iframe 3', Safari4 will load 'Top level page B/B iframe 1']
Safari4 behaves like others if 'Back' button is used.
Start from the beginning
go(-3) [IE8 will load the 'Start page', FF3.6 and Opera10 will load 'Top level page A/A iframe 2', Safari4 will load 'Top level page A/A iframe 3']
In IE8 pressing 'Back' 3 times works like go(-3) in FF3.6 and Opera10.
Safari4 behaves like others if 'Back' button is used.
-1