下拉菜单

<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1">点击显示/隐藏</a>
<div class="ui-dropdown" id="dropdown-1">
    <a href="#" class="ui-dropdown-item">批量删除</a>
    <a href="#" class="ui-dropdown-item">批量恢复</a>
    <div class="ui-dropdown-line"></div>
    <a href="#" class="ui-dropdown-item">批量推荐</a>
    <a href="#" class="ui-dropdown-item">批量置顶全部</a>
</div>

<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="top">top</a>
<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="right">right</a>
<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="bottom">bottom</a>
<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="bottom-left">bottom-left</a>
<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="top-left">top-left</a>
<a href="javascript:;" class="ui-btn ui-dropdown-show" data-target="#dropdown-1" data-align="right-top">right-top</a>