IE8及以下若模板参数出现二级属性将报错：缺少标识符
如下模板：
<tr>
                    <td>今日预测</td>
                    <td><%= data_today.forecast.new %></td>
                    <td><%= data_today.forecast.active %></td>
                    <td><%= data_today.forecast.rate %></td>
                    <td><%= data_today.forecast.start %></td>
                    <td><%= data_today.forecast.aver %></td>
                </tr>
