Displays keyboard shortcuts for Gmail. For more detailed shortcut tips, type "?" for display (Gmail default feature). Full description is here: http://mail.google.com/support/bin/answer.py?hl=en&ctx=mail&answer=6594

NOTE:
You need to ENABLE keyboard shortcut feature in settings.
Certain Lab feature may destroy the style. If you are using Tasks, see discussions below for more.

Alternative for Gmail - display keyboard shortcuts since it is obsolete.

2009.07.02: FIXED code change in Gmail. [54]
2009.05.16: FIXED should work with languages other than English.
FIXED stupid error. ADDED some items.
2009.05.15: FIXED so that it actually works. (NOTE: Gmail assigns id's dynamically so id selector does not work)
2009.05.01: Initial release.