Color Burn/ Color Dodge in FLASH?

1

Check out two these links:

http://www.podlob.com/flash/template.php?name=photododge&bgcolor=ffffff&width=300&height=360&quality=HIGH

http://www.podlob.com/flash/template.php?name=photoburn&bgcolor=ffffff&width=350&height=420&quality=LOW

Does anyone know how to create that burn and dodge technique in flash? I’ve been seeing this effect a lot lately.

-Thai