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n: Main navigation
Elements of main navigation: h: home; g; groups; r: learning resources
Open learning resources and groups (IE only): s, s, s...
o: Top navigation
m: Menu
c: Content area
t: Tools and actions
a: Table content (if available)
d: Modal dialog (if available)
b: One step back (if available)
Updated screen areas (Web2.a mode in IE only): u, u, u...
