//弹出层(从底部)
<div id="bottomb" class="weui-popup__container popup-bottom">
<div class="weui-popup__overlay"></div>
<div class="weui-popup__modal">
弹出层的内容。。。。(默认是不显示的)
</div>
</div>
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//下面主要是:a标签里面的两个类:open-popup(点击a打开弹出层) , lose-popup(点击a关闭弹出层)。还有:data-target=" #要与弹出层的div中的id属性值一样"
<div class="context_w">
<a class="weui-navbar__item weui-bar__item--on context_wei_item open-popup lose-popup" data-target="#bottomb" href="javascript:;" id="alljq">全部
<div class="weui-cell__ft">
</div>
</a>
</div>