Codice PHP:
<!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></title>
<script type="text/javascript" src="http://www.google.com/jsapi"> </script>
<script type="text/javascript"> 
google.load("language", "1"); 
function initialize1() { 
  //var text = document.getElementById("testo_it").value; 
  var input_text = document.getElementById("testo_it").innerHTML;
  google.language.detect(text, function(result) { 
    if (!result.error && result.language) { 
      google.language.translate(text, result.language, "en", 
        function(result) { 
        var translated = document.getElementById("traduzione_en"); 
        if (result.translation) { 
          translated.innerHTML = '<input style="width: 80%;" type="text" name="testo_en" id="testo_en" value="'+result.translation+'" />';
        }
      });
    }
  });
}
</script>

</head>
<body>

<table style="width: 500px">
    <tr>
        <td style="width: 150px">Testo (IT)</td>
        <td><input style="width: 80%;" type="text" name="testo_it" id="testo_it" value="" onkeyup="initialize1();" /></td>
    </tr>
    <tr>
        <td style="width: 150px">Testo (EN)</td>
        <td><div id="traduzione_en">
        <textarea style="width: 80%;" type="text" name="testo_en" id="testo_en" cols="40" rows="5" ></textarea>
        </div></td>
    </tr>
</table>
</body>
</html>