function showSecondPerson() {
	var second_person = document.getElementById("second_person");
	if(!second_person) {return false;}
	
	second_person.style.display = "block";
}
function hideSecondPerson() {
	var second_person = document.getElementById("second_person");
	if(!second_person) {return false;}
	
	second_person.style.display = "none";
}