<div class="weui-tab__panel" style="overflow:hidden;">
<div class="weui-cells weui-cells_form">
</div>
<a href="javascript:;" class="weui-btn weui-btn_primary" onclick="load()">查询</a>
<div class="weui-form-preview" style="overflow:auto;height:100%">
</div>
</div>
如上：可以通过overflow来设置悬浮
