JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE HTML>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <a href="">Hover me </a>
    <div class="hidden-box"> some text </div>
                    <div class="flash-banner">
                    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="734" height="158"> 
                    <param name=movie value="http://global.dymo.com/img/compel/ND5ZxlhlvE19mG-5A02LMEsV2zQRRY5i.swf"> 
                    <param name="quality" value="high"> 
                        <embed src="http://global.dymo.com/img/compel/ND5ZxlhlvE19mG-5A02LMEsV2zQRRY5i.swf" quality="high" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="734" height="158"></embed>
                    </object>
                </div>
</body>
</html>

CSS

.hidden-box {display:none; width:100px; height:100px;position:absolute;z-index:1}

.flash-banner {display:}

JavaScript

$('a').hover(function(){
    $('.hidden-box').show();
});