微信jssdk批量展示卡包中的卡券

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport"
    content="width=device-width, user-scalable=0, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" />
<c:set var="ctx" value="${pageContext.request.contextPath }" />
<link rel="stylesheet" href="${ctx }/jsp/xte/level/static/css/load.css" />
<title>TITLE</title>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script src="${ctx }/js/hideOptionMenu.js"></script>
</head>
<body>
    <input type="hidden" name="userId" id="userId" value="${userId }">
    <input type="hidden" id="redirect_uri" name="redirect_uri"
        value="${redirect_uri}" />

    <input type="hidden" id="componentAppId" name="componentAppId"
        value="${componentAppId }">
    <input type="hidden" id="appId" name="appId" value="${appId }" />
    <input type="hidden" id="code" name="code" value="${code }" />
    <input type="hidden" id="openid" name="openid" value="${openid }" />
    <c:forEach var="cardlog" items="${ wxCardPackageCodes}">
        <input type="hidden" class="cardId" name="c" 
            value="${cardlog.card_id }" />
        </br>
        <input type="hidden" class="code" name="" value="${cardlog.code }">
    </c:forEach>
    <div id="front" style="display: block; opacity: 1">
        <div class="tips">
            <div class="icon loading"></div>
            <p>加载中...</p>
        </div>
    </div>
</body>
<script type="text/javascript"
    src="${ctx }/js/jquery1.6/jquery-1.6.1.js"></script>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script type="text/javascript">
    $(function() {
        var cardId = $(".cardId");
        var code = $(".code");
        var l = {};
        var a = [];
        var b;
        for ( var i in code) {
            if (code[i].value !== undefined) {
                b = new Object();
                b = {
                    cardId : "" + cardId[i].value + "",
                    code : "" + code[i].value + ""
                };
                a.push(b)
            }
        }

        var url = location.href.split('#')[0];
        var userId = $("#userId").val();
        $.post("http://www.quanqiuyouhui.com/kabao-api/getShareData.do", {
            'url' : url,
            'userId' : userId
        }, function(data) {
            data = eval("(" + data + ")");
            wx.config({
                debug : false,
                appId : data.map.appId,
                timestamp : data.map.timestamp,
                nonceStr : data.map.nonceStr,
                signature : data.map.signature,
                jsApiList : [ 'checkJsApi', 'onMenuShareTimeline',
                        'onMenuShareAppMessage', 'openCard' ]
            });
            wx.ready(function() {
                wx.openCard({
                    cardList : a
                });

            });
            wx.hideMenuItems({
                menuList : [ 'menuItem:share:qq', 'menuItem:share:weiboApp',
                        'menuItem:share:email', 'menuItem:share:facebook',
                        'menuItem:share:QZone' ]
            // 要隐藏的菜单项，只能隐藏“传播类”和“保护类”按钮，所有menu项见附录3
            });

        })
    });
</script>
</html>

注：代码中标黄的部分

cardId[i].value

应该使用value，如果使用val()不成功