If you receive any link starting from http://www.geocities.com that recuire you to login, PLEASE DO NOT login. It will email your login ID and password to the stupid damn ass script’s owner. How to know either it is a phishing site or not?
1) Look at the URL. If it is a real Yahoo! login screen, the URL will start with http://login.yahoo.com/config/login
2) Make sure there is no frame at the right side of your screen.