function changeTab( id ) {
	var thisID = id;
	var blockID = id + "_block";
	
	document.getElementById('denmark').className = "";
	document.getElementById('finland').className = "";
	document.getElementById('iceland').className = "";
	document.getElementById('sweden').className = "";
	
	
	document.getElementById('denmark_block').style.display = "none";	
	document.getElementById('finland_block').style.display = "none";
	document.getElementById('iceland_block').style.display = "none";
	document.getElementById('sweden_block').style.display = "none";

	
	document.getElementById(thisID).className = "selected";
	document.getElementById(blockID).style.display = "block";
	
}