JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" class="tooltip">
    Tooltip
    <span>
        <img class="callout" src="http://radiantq.com/wp-content/uploads/2011/11/software_box.png" width="50" height="50" />
        <strong>Most Light-weight Tooltip</strong><br />
        This is the easy-to-use Tooltip driven purely by CSS.
    </span>
</a>

<a href="#" class="tooltip">
    <img src="http://radiantq.com/wp-content/uploads/2011/11/software_box.png"  width="50" height="50"/>
    <span>
        <img class="callout" src="http://radiantq.com/wp-content/uploads/2011/11/software_box.png" height="20" width="20" />
        <strong>CSS only Tooltip</strong><br />
        <img src="http://radiantq.com/wp-content/uploads/2011/11/software_box.png" style="float:right;" height="20" width="20"/>
        Pure CSS popup tooltips with clean semantic XHTML.
    </span>
</a>
<iframe id="iframe1" src="http://jqfaq.com/AdPage.html" style="width:100%; height:115px; border:none;"
/>

CSS

a.tooltip {
    outline:none;
}
a.tooltip strong {
    line-height:30px;
}
a.tooltip:hover {
    text-decoration:none;
}
a.tooltip span {
    z-index:10;
    display:none;
    padding:14px 20px;
    margin-top:-30px;
    margin-left:28px;
    width:240px;
    line-height:16px;
}
a.tooltip:hover span {
    display:inline;
    position:absolute;
    color:#111;
    border:1px solid #DCA;
    background:#fffAF0;
}
.callout {
    z-index:20;
    position:absolute;
    top:30px;
    border:0;
    left:-12px;
}
/*CSS3 extras*/
 a.tooltip span {
    border-radius:4px;
    -moz-border-radius: 4px;
    -webkit-border-radius: 4px;
    -moz-box-shadow: 5px 5px 8px #CCC;
    -webkit-box-shadow: 5px 5px 8px #CCC;
    box-shadow: 5px 5px 8px #CCC;
}