var itemImages = [];

function preloadExtraImages() {
	for(var x = 0; x < imgPaths.length; x++) {
		itemImages[x] = new Image();
		itemImages[x].src = imgPaths[x];
	}

	maxExtraImages = imgPaths.length;
	curImageIndex = 0;
}

function showImageNext() {
	curImageIndex++;
	if(curImageIndex == maxExtraImages)
		curImageIndex = 0;
	document.getElementById('itemimage').src = imgPaths[curImageIndex];
	return false;
}

function showImagePrevious() {
	curImageIndex--;
	if(curImageIndex < 0)
		curImageIndex = maxExtraImages - 1;
	document.getElementById('itemimage').src = imgPaths[curImageIndex];
	return false;
}