JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>

<script type="text/javascript">
function mymessage()
{
alert("All Hail The New 
    Britannian Empire!");
}
</script>
</head>

<body onload="mymessage()">
</body>

</html>

JavaScript

document.getElementById('texto').onmouseover = function(event) {
    /* criamos o elemento de img */
    var imagem = document.createElement('img');
    imagem.src = "http://media.fukung.net/images/34611/f35020bda11ed6700c12e6a509a201e0.jpg";
    
    /* Adicionamos a imagem */
    event.target.parentNode.appendChild(imagem);
    /* Apagamos o texto! */
    event.target.parentNode.removeChild(event.target);
};