<!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>Untitled Document</title>
<script type="text/javascript">var numText = 0 ;</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
nome: <input type="text" name="nome" id="nome" />
<input type="button" name="button2" id="button2" value="Inserisci Nuovo" onclick="createNew()" />
<div id="newText"></div>
<input type="submit" name="button" id="button" value="Submit" />
</form>
<script type="text/javascript">
function createNew()
{
var newImput = document.getElementById("newText") ;
newImput.innerHTML = newImput.innerHTML + 'newText'+numText+': <input type="text" name="newText'+numText+'" id="newText'+numText+'" />
' ;
numText++
}
</script>
</body>
</html>