图片元素缺少 [alt] 属性
比如以下可视化代码如何加入 [alt] 属性
<div class="img zan-edit" e-id="index9" e-type="upload">{zan:uiupload e-id='index9' e-page='index' id='field'}
{$field.value}
{zan:else /}<img src="{zan:global name='web_templets_pc' /}/skin/images/home-about.jpg" width="700" height="540" />{/zan:uiupload}</div>
</div>