Compare the IE6 navigation button group
with the ones in IE7
Ha Ha Ha.
Did you get it?
No?
Ahem
The IE6 developer said, a user will want to navigate back and forth and may want to select a url in either direction. That makes four scenarios. Hence two buttons each with a drop down menu.
The IE7 program manager says, wait a minute. There are only three scenarios. The user can go back, forward, or pick a website from the history to navigate to. Ergo, Two buttons and one drop down.
Follow the mental model, not mathematical
Eureka
