isNaN

by Greg Bowler

CSS

body {
    background: #000;
    color: #f00;
    font-family: sans-serif;
    font-size: 64px;
    font-weight: bold;
    word-wrap: break-word;
}

JavaScript

document.body.innerText = 
    
    Array(16).join("intro" - "Song") + " Batman";