This is the commit of code by tenrapid (http://drupal.org/user/37587) that was original posted on the website http://footballworldcup.tenrapid.de
The first commit is of this code in its original form. The only change is the name of the module from "footballworldcup" to "tipping" as my goal is to make this code more generic. I've sent a message to tenrapid via his contact form, and also a message on http://drupal.org/node/65199