Error when you select "Please Select" in Manufacturers drop down

[CdoGG]

Hello

 

My store gets an error page when someone goes to the manufacturers drop down and selects a manufacturer then selects the default selection "Please Select" . I know most people probably wouldn't do this but how can I fix this?

 

Here is my site

 

http://www.hartsbatteries.com

[CdoGG]

Help????

 

 

:blink: