20">最多20字符 maxlength限制</span></p>
                     <label for="comment" class="db"><span class="dn">评论</span>内容：</label><textarea id="comment" class="w460" rows="5" data-max="100" data-min="5" required></textarea>
                    <p class="mt5 f9 g6">5-100字的限制, required, label标签中部分提示文字隐藏</p>
                </div>
                <input type="submit" class="submit" value="提交测试" disabled />
            </form>        
        </div>
        