My Aching Back  
 

Back Button and back() Method Behavior Within Framesets 
Through the Ages

	Back Button	history.back()	window.back()	location.replace()
Nav 2	whole window only	whole window only	n/a	no
Nav 3	frame-aware	only within frameset	n/a	yes
Nav 4	frame-aware	window-specific	window-specific	yes
IE 3	frame-aware	global history (to blank)	n/a	yes (J2)
IE 4	frame-aware	global history	n/a	yes