olor: red" id="nickname_msg"></span>
            </td>
        </tr>
        <tr>
            <td class="tds"><label for="email">邮箱：</label></td>
            <td>
                <input type="text" name="email" id="email" onblur="checkNull('email', '邮箱不能为空')"/>
                <span style="color: red" id="email_msg"></span>
            </td>
        </tr>
        <tr>
            <td class="tds"><label for="valistr">验证码：</label></td>
            <td>
                <input type="te