Wow, apparently using link drop-down menus and rollover effects has been patented since 1990, and the copyright owner of the patent is now suing sites to be able to use the effects by selling licenses for $80,000 each.
So far many big companies such as American Express and Visa have been sued and have paid the $80,000 to use drop down menus on their websites.
Read on…: Rollover Images/Effects on Your Site Will Cost You