function over(id){
	document.getElementById(id + "_pieni").style.display = "none";
	document.getElementById(id + "_iso").style.display = "block";
	if(id != "center"){
		document.getElementById("center_iso").style.display = "none";
		document.getElementById("center_pieni").style.display = "block";
	}
}
function out(id){
	document.getElementById("center_pieni").style.display = "none";
	document.getElementById("center_iso").style.display = "block";
	if(id != "center"){
		document.getElementById(id + "_iso").style.display = "none";
		document.getElementById(id + "_pieni").style.display = "block";
	}
}