function displayJapanDir() {
	document.getElementById('japanDir').style.display="block";
	document.getElementById('worldDir').style.display="none";
	document.getElementById('japanTab').style.backgroundPosition = "0 0";
	document.getElementById('worldTab').style.backgroundPosition = "0 -24px";	
}

function displayWorldDir() {
	document.getElementById('japanDir').style.display="none";
	document.getElementById('worldDir').style.display="block";
	document.getElementById('japanTab').style.backgroundPosition = "0 -24px";
	document.getElementById('worldTab').style.backgroundPosition = "0 0";
}