function SubstituteImage(img) {
	var oImg = RLdesign.Utils.DefineObject("product_bigimage");
	if (oImg != null) {
		oImg = oImg.getElementsByTagName("img")[0];
	}

	if (oImg != null) {
		if (oImg.defaultSrc == null || oImg.defaultSrc == "") {
			oImg.defaultSrc = oImg.src;
		}
		oImg.src = img;
	}

	oImg = null;
}