yogia_Recreating Form from Form Responses Sheet For Select Fields Per Specified Condition

Yogi Anand, D.Eng, P.E.                                         Google Spreadsheet                            www.energyefficientbuild.com
user ggamauf said:

with your help i created the following -> 

=arrayformula(if(row(A:A)=1,"Click on Link in corresponding row to recreate Form as was originally submitted",if(len(A:A),hyperlink("https://spreadsheets.google.com/spreadsheet/viewform?formkey=dF9MaXlkV2RQS1F5NFcxWDFBZmZwM3c6MQ&entry_0="&b1:b&"&entry_1="&c1:c&"&entry_2="&d1:d&"&entry_3="&e1:e&"&entry_4="&f1:f&"&entry_5="&g1:g&"&entry_6="&h1:h&"","recreate form"),iferror(1/0))))

now i need to say (eg): 

only if field b is filled display fields c and d

or only if field d is filled display fields a, b and c (always WITH contents)

what's the formaility for doing this?

can i read this somewhere?

i don't even know: is this javascript?

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we are using Google spreasheet formulas
following is the solution to the problem for the first part of user's question ... solution to the second part can be adapted from the solution to the first part of the question

Please note:
1) that per the specified condition only those records in which the field for Question 1 is not blank have been prepped for recreating the Form as originally submitted
2) and for select records per 1) answers only for Questions 1,2, and 3 will be filled in the Form

here is the Form that will be seen if the hyperlink recreate form for record 3 is clicked: