<!DOCTYPE html> <script> 'use strict'; window.addEventListener('load', function() { function isProduction() { var l = window.top.location; if (l.hash === '#_production') { return true; } if (l.hostname === 'localhost' || l.hostname === '127.0.0.1') { return false; } return true; } var s = document.createElement('script'); var src = 'piano.js'; if (isProduction()) { src = 'https://dl.dropboxusercontent.com/u/3692507/ebiten.examples/' + src; } s.src = src; document.body.appendChild(s); }); </script>