how can i hide a field in View mode based on a value of another field? I suspect I can use the serverwidgets module but am unclear on how to do this. any tips appreciated.

use a beforeLoad user event script

Thanks. How do I get the already create form? I assume I would be using:

var field = form.getField({

id : 'custbody105'

});

look at the parameters of the beforeLoad entrypoint

also, you could use workflow