function tresc(id) {
	document.getElementById("mistral").style.display="none";
	document.getElementById("galanz").style.display="none";
	document.getElementById("centrumklima").style.display="none";
	document.getElementById(id).style.display="block";
}
function zakladki1(id1) {
	document.getElementById("z11").style.display="none";
	document.getElementById("z12").style.display="none";
	document.getElementById(id1).style.display="block";
}
function zakladki2(id2) {
	document.getElementById("z21").style.display="none";
	document.getElementById("z22").style.display="none";
	document.getElementById(id2).style.display="block";
}
function zakladki3(id3) {
	document.getElementById("z31").style.display="none";
	document.getElementById("z32").style.display="none";
	document.getElementById(id3).style.display="block";
}