function changeTab( id ) {
	var thisID = id;
	var blockID = id + "_block";
	
	document.getElementById('bulgaria').className = "";
	document.getElementById('croatia').className = "";
	document.getElementById('czech').className = "";
	document.getElementById('hungary').className = "";
	document.getElementById('poland').className = "";
	document.getElementById('romania').className = "";
	
	
	document.getElementById('bulgaria_block').style.display = "none";	
	document.getElementById('croatia_block').style.display = "none";
	document.getElementById('czech_block').style.display = "none";
	document.getElementById('hungary_block').style.display = "none";
	document.getElementById('poland_block').style.display = "none";
	document.getElementById('romania_block').style.display = "none";
	
	document.getElementById(thisID).className = "selected";
	document.getElementById(blockID).style.display = "block";
	
}