Cidice pagina html

codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento senza titolo</title>
</head>

<body>

<script language="javascript" type="text/javascript" src="testo.js"></script>

</body>
</html>
Codice file esterno chiamato testo.js (importante l'estensione .js)

codice:
info="testo
" + 
"testo
" + 
"testo
" + 
"testo"

document.write(info)