num = 1

function gallerynav(imgNum, direction, imgTot) {
	
	if (document.getElementById) {
		num = num + direction
		id = 1
		if (num < 1) {num = imgTot}
		if (num > imgTot) {num = 1}
		if (imgNum!="0") {num = imgNum}
		while (id <= imgTot) {
			document.getElementById("large"+id).style.display = "none";
			id = id+1
			}
  		document.getElementById("large"+num).style.display = "block";
 	}
}