// add multi goods for cart.
function addCartMulti(form_name) {
	var form = document.getElementById(form_name);
	var goods_count = form.goods_count.value;
	var console = null;
	var tags = form.getElementsByTagName("span");
	for (var j=0; j<tags.length; j++) {
		tag = tags[j];
		if (tag.className == "goods_id_console") {
			console = tag;
			break;
		}
	}
	
	if (console==null) {
		return false;
	}

	// initialize
	console.innerHTML = '';
	checkCount = 0;
	for (var i=0; i<goods_count; i++) {
		chk = document.getElementById("goods_id"+(i+1));
		if (chk==null) {
			continue;
		}
		if (chk.checked) {
			checkCount++;
			html = '<input type="hidden" name="goods_id'+(i+1)+'" value="'+(chk.value)+'" />';
			console.innerHTML += html;
		}
	}
	
	if (checkCount>0) {
		return true;
	} else {
		alert("商品が一つも選択されていません。");
		return false;
	}
}