JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.google.co.uk/images/logos/ps_logo2a_cp.png" width="364" height="126">

<h4 class="areaLabel" style="left:30px; top:60px; width: 60px; height: 30px;"><span>Stairs<span></h4>

<h4 class="areaLabel" style="left:115px; top:60px; width: 60px; height: 30px;"><span>Door<span></h4>

CSS

.areaLabel { position: absolute; }
.areaLabel span{ display: none; }

JavaScript

$('h4.areaLabel')
    .hover(function(){
        $('span',this).fadeToggle('fast');
    });