示例描述：
<![CDATA[<div class="yo-dialog yo-dialog-test">
<div class="bd">
<p>不带title的dialog</p>
</div>
<footer class="ft">
<button class="yo-btn yo-btn-dialog yo-btn-l">取消</button>
<button class="yo-btn yo-btn-dialog yo-btn-l">确定</button>
</footer>
</div>]]>
示例描述：
<![CDATA[<div class="yo-dialog">
<header class="hd">
<h2 class="title">标题</h2>
</header>
<div class="bd">
<p>有title的dialog</p>
</div>
<footer class="ft">
<button class="yo-btn yo-btn-dialog yo-btn-l">取消</button>
<button class="yo-btn yo-btn-dialog yo-btn-l">确定</button>
</footer>
</div>]]>
示例描述：
<![CDATA[<div class="yo-dialog yo-dialog-test">
<header class="hd">
<h2 class="title">标题</h2>
<span class="regret">取消</span>
<span class="affirm">保存</span>
</header>
<div class="bd">
<p>标题区域带操作功能的dialog</p>
</div>
</div>]]>