Browsers handle default select options differently

Browsers handle default select options differently

How do you folks handle <select> lists with no default option selected?  I have mocked up a simple sample but in reality I may have a dozen different categories.  (Link: http://jsbin.com/oriju)http://jsbin.com/oriju Do you disable all other hidden <select> elements so that their values are not sent in a POST request?

http://jsbin.com/oriju