function changeTab( id ) {
	var thisID = id;
	var blockID = id + "_block";
	
	document.getElementById('belgium').className = "";
	document.getElementById('france').className = "";
	document.getElementById('luxembourg').className = "";
	document.getElementById('netherlands').className = "";
	document.getElementById('portugal').className = "";
	document.getElementById('spain').className = "";
	
	document.getElementById('belgium_block').style.display = "none";
	document.getElementById('france_block').style.display = "none";
	document.getElementById('luxembourg_block').style.display = "none";
	document.getElementById('netherlands_block').style.display = "none";
	document.getElementById('portugal_block').style.display = "none";
	document.getElementById('spain_block').style.display = "none";
	
	document.getElementById(thisID).className = "selected";
	document.getElementById(blockID).style.display = "block";
	
}