function setPhoto(i) {
	var NewPhotoURL = Photos[i];
	document.getElementById('photo').src = NewPhotoURL;
//    document.getElementById('position').innerHTML = 'Foto '+ (i+1) +' z '+Photos.length;

	if (Names[i]) {
		var NewPhotoName = Names[i];
		document.getElementById('photoname').style.visibility = "visible";
		document.getElementById('photoname').innerHTML = NewPhotoName;
	}
	else {
		document.getElementById('photoname').style.visibility = "hidden";
	}

// 	if (Descripts[i]) {
// 		var NewPhotoDescript = Descripts[i];
// 		document.getElementById('descript').style.visibility = "visible";
// 		document.getElementById('descript').innerHTML = "" + NewPhotoDescript + "";
// 	}
// 	else {
// 		document.getElementById('descript').style.visibility = "hidden";
// 	}

	if (i == 0) {
		document.getElementById('prev').style.visibility = "hidden";
	}
	else {
		document.getElementById('prev').style.visibility = "visible";
	}

	if (i == (Photos.length - 1)) {
		document.getElementById('next').style.visibility = "hidden";
	}
	else {
		document.getElementById('next').style.visibility = "visible";
	}
}

function nextPhoto() {
	if (i < Photos.length) {
		i++;
		setPhoto(i);
	}
}

function prevPhoto() {
	if (i > 0) {
		i--;
		setPhoto(i);
	}
}