Script Summary: Floats selected Google Notebook Navigation Menu.
Note that this script does NOT do anything with the *NEW* Google Notebook interface. The new interface solves the navigation problem with scrollable left-nav:)
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Google Notebook Floating Nav. For the selected notebook, you'll always see the menu of headings on the left-nav -- no matter where you scroll to. Now find the notebook list in a drop-down list labeled 'Choose Notebook'. The result is a cleaner and more user friendly navigation system. Having to scroll back to the top to switch to a another heading was very unfriendly.
