Script Summary: It changes the password field type to plain text on double click. When the field looses focus or is double clicked again, it changes back to a normal password field with the text obscured.
Version: 2.2
It uses a small CSS hack to perpetrate this instead of mucking with the style directly.
Should work on all pages (except those dynamically adding fields after GM has run, which would be very few).
Version 2.2 adds Google Chrome support.
