How to implement a layer above a layout?
<p>How to implement a layer above a layout? like this pic:
<a href="http://ss12.sinaimg.cn/orignal/5d8cb30ag8f47eca43a5b&amp;690" rel="nofollow">http://ss12.sinaimg.cn/orignal/5d8cb30ag8f47eca43a5b&amp;690</a></p>
