title: mac toolbar style
body: <p>Does anybody know how to make a toolbar which style is like top bar of "Xcode Organizer"?
  Press different item ,different view will show down below.
  It has toolbar style but tab bar function,Many mac apps' preference pane use it,I'm confused.
  Can anybody help me please.
  Thank you very much.
  Plus this is a Mac Application</p>