asiCheckBlank

asiCheckBlank( 
o_obj 
r_form 
s_fieldName 
) 
=> t / nil

Verifies that the s_fieldName entry is non-blank.

o_obj

Can be one of the following objects:

o_analysis, o_anaOption, o_envOption, o_simOption, o_keepOption.

r_form

Form created by a call to hiCreateAppForm or hiCreateForm.

s_fieldName

Handle to this field within a form. It may be referenced as formHandle->hiFieldSym

`t`	Returns `t` if the check is successful.
`nil`	Otherwise, returns `nil`.