Merge pull request #6 from bfgeek/master

call paintSuper to draw above existing background.
Fix weird disappearing style issue.
Added @param line.
put els_ back.
Merge pull request #5 from shans/fixStyleIssue

Fix weird disappearing style issue.
Basic sparkle trail.
Merge pull request #7 from shans/sparkle

Basic sparkle trail.
Checkbox demo + persists state between paintSuper calls.