function showAF() {
		hideAllOthers('africa');
		document.getElementById('africa').style.display = "block";
	}
	
	function showSA() {
		hideAllOthers('southamerica');
		document.getElementById('southamerica').style.display = "block";
	}
	
	function showNA() {
		hideAllOthers('northamerica');
		document.getElementById('northamerica').style.display = "block";
	}
	
	function showEU() {
		hideAllOthers('europe');
		document.getElementById('europe').style.display = "block";
	}
	
	function showAS() {
		hideAllOthers('asia');
		document.getElementById('asia').style.display = "block";
	}
	
	function hideAllOthers(region) {
		var ar = new Array();
		ar[0] = "default";
		ar[1] = "africa";
		ar[2] = "northamerica";
		ar[3] = "europe";
		ar[4] = "southamerica";
		ar[5] = "asia";
		for(i=0; i<ar.length; i++) {
			if(ar[i] != region) {
				document.getElementById(ar[i]).style.display = "none";
			}
		}	
	}