JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content_container" style="position:relative;width:400px;height:200px;overflow:hidden;background:#FF00FF">
    <div class="content">content</div>
    <img class="overlay_image" style="position:absolute;top:0;left:0;display:none;" src="http://2.bp.blogspot.com/_bpMgKpXKabQ/TKMrEZGoOLI/AAAAAAAAARQ/JNp1BmVlEB4/s1600/Monkey-Mia-MJK-Australia.jpg"/>
</div>
<div class="content_container" style="position:relative;width:400px;height:200px;overflow:hidden;background:#FFFF00">
    <div class="content">content2</div>
    <img class="overlay_image" style="position:absolute;top:0;left:0;display:none;" src="http://thatwritingchic.files.wordpress.com/2011/05/money.jpg"/>
</div>

<div class="content_container" style="position:relative;width:400px;height:200px;overflow:hidden;background:#00FFFF">
    <div class="content">content3</div>
    <img class="overlay_image" style="position:absolute;top:0;left:0;display:none;" src="http://upload.wikimedia.org/wikipedia/commons/7/7b/Donkey_1_arp_750px.jpg"/>
</div>

JavaScript

$('.content_container').hover(function(){
    $(this).children('.overlay_image').fadeToggle(300);
});