var iPath = '../img/gallery/';
var currentImg = 1;

function preload(galleryImgs) {
	var argLen = galleryImgs.length;
	for(var i = 0; i < argLen; i++) {
		var arg = galleryImgs[i];
		self[arg] = new Image();
		self[arg].src = iPath + arg + ".jpg";
	}
}

function next() {
	currentImg += 1;
	if(currentImg > gallery.length) currentImg = 1;
	document.getElementById("photo").src = self[gallery[currentImg - 1]].src;
	document.getElementById("photono").innerHTML = "Fotografie " + currentImg + " z " + gallery.length;
	document.getElementById("photo").parentNode.onclick = function() { fullSize('kahn' + currentImg, currentImg, gallery.length) };
}

function previous() {
	currentImg -= 1;
	if(currentImg == 0) currentImg = gallery.length;
	document.getElementById("photo").src = self[gallery[currentImg - 1]].src;
	document.getElementById("photono").innerHTML = "Fotografie " + currentImg + " z " + gallery.length;
	document.getElementById("photo").parentNode.onclick = function() { fullSize('kahn' + currentImg, currentImg, gallery.length) };
}

window.onload = function() {
	externalLinks();
	preload(gallery);
}