Answers for "if text selected make radio button appear"

check if one of the radio button is checked

if ($('input[name='+ radioName +']:checked').length) {
           // at least one of the radio buttons was checked
           return true; // allow whatever action would normally happen to continue
      }
      else {
           // no radio button was checked
           return false; // stop whatever action would normally happen
      }

Radio enable note if member has valid radio

if(input.Member_Radios != null && input.Reprogram_this_radio == true)
{
	input.Radio_NOT_listed_above = false;
	//show the remainder of the fields here
	show Note;
	enable Note;
}
if(input.Radio_Make_and_Model != null && input.Enter_Radio_Serial != null && input.Reprogram_this_radio == true)
{
	show Note;
	enable Note;
}