Sott,I'm getting a syntax error.  I made the presence for my address field 'hidden (exclude from layout)'  it's the only hidden option I have. Then added the change script to the check box.  What have I missed?' Thanks for your help.

How do you hide an object that is viewed only when triggered by the selection of another object?  Meaning, if I click the check box, then only will I see the fields for entering an address?  But if the check box is never checked, then that address field is never visible.