var mapImages = new Array();
	var continentIds = new Array();
	
	for(var i=1; i<=8; i++) {
		var newImage = new Image(620, 325);
		newImage.src = "http://www.yukiba.com/images/" + "map_" + i + ".gif";
		mapImages.push(newImage);
	}
	
	
	function showCountry(node_id) {
		for(var i=0; i<continentIds.length; i++) {
			var continentId = continentIds[i];
			var continentDiv = document.getElementById("node_id_" + continentId);
			if(continentDiv) {
				if(node_id == continentId) {
					continentDiv.style.display = 'block';
				} else {
					continentDiv.style.display = 'none';
				}
			}
		}
		
		resizeContent();		
	}