page1 page2 buttons
OneLineTab
swap button pages
elevation tab
altitude panel
animate changing pages
show actual altitude
better highlight of tabs
use highlightTimeout variable
average altitude of last three values
highlight selected tab in blue color
handle infinite speed and altitude
do not highlight page tab on select
on error set undefined speed
highlight tabs even if they're already active
heading tab
empty heading panel
show degrees in heading panel
build
scaling compass canvas