make more than email and name required

[David J Dow]

Is it possible to make more than name and email required. when I add in the following code
<input type="hidden" name="FNameReq" value="true">
<input type="hidden" name="LNameReq" value="true">
<input type="hidden" name="EmailReq" value="true">
<input type="hidden" name="PhoneReq" value="true">

Still only email and FName (the name fieldfield) are required