function faa(i,n){
	switch (n){
		case 'a':
			document.getElementById(i+"_a").style.display="block";
			document.getElementById(i+"_b").style.display="none";
			document.getElementById(i+"_c").style.display="none";
			document.getElementById(i+"_d").style.display="none";
			fda(i,'a');
		break;
		case 'b':
			document.getElementById(i+"_a").style.display="none";
			document.getElementById(i+"_b").style.display="block";
			document.getElementById(i+"_c").style.display="none";
			document.getElementById(i+"_d").style.display="none";
			fda(i,'b');
		break;
		case 'c':
			document.getElementById(i+"_a").style.display="none";
			document.getElementById(i+"_b").style.display="none";
			document.getElementById(i+"_c").style.display="block";
			document.getElementById(i+"_d").style.display="none";
			fda(i,'c');
		break;
		case 'd':
			document.getElementById(i+"_a").style.display="none";
			document.getElementById(i+"_b").style.display="none";
			document.getElementById(i+"_c").style.display="none";
			document.getElementById(i+"_d").style.display="block";
			fda(i,'d');
		break;
	}
}

function fda(i,n){
	switch (n){
		case 'a':
			document.getElementById("jaa"+i).style.display="block";
			document.getElementById("jab"+i).style.display="none";
			document.getElementById("jac"+i).style.display="none";
			document.getElementById("jad"+i).style.display="none";
		break;
		case 'b':
			document.getElementById("jaa"+i).style.display="none";
			document.getElementById("jab"+i).style.display="block";
			document.getElementById("jac"+i).style.display="none";
			document.getElementById("jad"+i).style.display="none";
		break;
		case 'c':
			document.getElementById("jaa"+i).style.display="none";
			document.getElementById("jab"+i).style.display="none";
			document.getElementById("jac"+i).style.display="block";
			document.getElementById("jad"+i).style.display="none";
		break;
		case 'd':
			document.getElementById("jaa"+i).style.display="none";
			document.getElementById("jab"+i).style.display="none";
			document.getElementById("jac"+i).style.display="none";
			document.getElementById("jad"+i).style.display="block";
			break;
	}
}