prova a copiare ed incollare

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

	    <script type="text/javascript">

		var Cifrario = function() {

			var _alfabeto = {
				
				/* vocali  (originale:cifrato) */
				"a" : "e", "e" : "i", "i" : "o", "o" : "u", 
				"u" : "a",

				/* consonanti (originale:cifrato) */
				"b" : "c", "c" : "d", "d" : "f", "f" : "g",
				"g" : "h", "h" : "j", "j" : "k", "k" : "l",
				"l" : "m", "m" : "n", "n" : "p", "p" : "q",
				"q" : "r", "r" : "s", "s" : "t", "t" : "v",
				"v" : "w", "w" : "x", "x" : "y", "y" : "z",
				"z" : "b"
            };

			return {
				cifrazione	: function(s) {
					var input = new String(s);
					var output = [];

					for (var i=0; i<input.length; i++) {
						output[output.length] = _alfabeto[input.charAt(i)];
					}

					return output.join('');					
				},

				converti 		: function(i, o) {
					document.getElementById(o).value = this.cifrazione(document.getElementById(i).value.toLowerCase()); 
				}


            }
        } 


		var miocifrario = new Cifrario();
		</script>


	</head>
<body>

<form>
	<input type="password" id="originale1" /> 
	<input type="text" id="cifrato1" /> 
	<input type="button" value="Cifra" onclick="miocifrario.converti('originale1', 'cifrato1');">
</form>

</body>
</html>