Hide fields in admin email - RSForm! Pro, PHP Script

IN PROGRESS
Bids
11
Avg Bid (USD)
$77
Project Budget (USD)
$30 - $250

Project Description:
I need a small script.
I have a form (RSForm!Pro in Joomla) with 2 dropdown menu fields and 1 radio button field.

Radio button
Item1 //Hides Dropdown menu 1
Item2 //Hides Dropdown menu 2

Dropdown_menu_1
Item1
Item2
Item3

Dropdown_menu_2
Item1
Item2

Admin Emails TO field : {Dropdown_menu_1:value}, {Dropdown_menu_2:value}

I need a script that removes one of the values (menu1 or menu2 ) fra the admin email based on the selection of the radio button.

OR

Somethng like : Onchange - Radiobutton - remove - dropdown_menu_value. so one of the fields always are empty.

Skills required:
Joomla
About the employer:
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