function zmenit_top1() {
	document.getElementById("Obr").src="../images/top-img-1.png";
}
function zmenit_top1(poradi) {
	document.getElementById('Obr').src="../images/top-img-"+poradi+".png";
}
function zmenit_top2() {
	document.getElementById("Obr").src="../images/top-img-4.png";
}
function zmenit_top2(poradi) {
	document.getElementById('Obr').src="../images/top-img-"+poradi+".png";
}
function zmenit_top3() {
	document.getElementById("Obr").src="../images/top-img-7.png";
}
function zmenit_top3(poradi) {
	document.getElementById('Obr').src="../images/top-img-"+poradi+".png";
}