var sib1 = document.getElementById('Sibling1').style;
var sib2 = document.getElementById('Sibling2').style;
sib1.display = 'none';
sib2.display = 'none';

var sibb1 = document.getElementById('SibB1').style;
sibb1.display = 'none';


function AddSib(SibNum){
	var sib = document.getElementById("Sibling"+SibNum).style;
	sib.display = 'block';
	var sibb = document.getElementById("SibB"+SibNum).style;
	sibb.display = 'none';	
}