两个Img 叠加嵌套

<div style="position: relative;">
<div style="position: absolute;">
<img class="img" src="/image/unselected.png" onclick="changeColor(this)">
</div>
<img class="img" src="/image/nofile.png"/>
</div>

 

来源：https://www.cnblogs.com/sleepingDogs/p/11423773.html