<!-- 商品ページの画像切り替えスクリプト -->

<!-- 画像ファイルのパス -->
bigpicthome = "http://www.horse-gift.com/shop/itemimages/";
smallpicthome = "http://www.horse-gift.com/shop/itemimages/";

<!-- スクリプトで使用する変数群の定義 -->
bigpicturl = new Array(3);
smallpicturl = new Array(3);
sumbnailfield = new Array(3);

sumbnailfield[0] = "smallPhotoA";
sumbnailfield[1] = "smallPhotoB";
sumbnailfield[2] = "smallPhotoC";
sumbnailfield[3] = "smallPhotoD";

bigpicturl[0] = bigpicthome+itemnum+"a.jpg";
bigpicturl[1] = bigpicthome+itemnum+"b.jpg";
bigpicturl[2] = bigpicthome+itemnum+"c.jpg";
bigpicturl[3] = bigpicthome+itemnum+"d.jpg";

smallpicturl[0] = smallpicthome+itemnum+"as.jpg";
smallpicturl[1] = smallpicthome+itemnum+"bs.jpg";
smallpicturl[2] = smallpicthome+itemnum+"cs.jpg";
smallpicturl[3] = smallpicthome+itemnum+"ds.jpg";


<!-- 関数定義 -->
function showupdate(pictIndex) {
	document.bigPhoto.src = bigpicturl[pictIndex];
	return;
}

function showsumbnail(pictIndex) {
	document[sumbnailfield[pictIndex]].src = smallpicturl[pictIndex];
	return;
}