codice:
<script>
function a() {
 var t = document.form.T1.value;
 document.form.action = "get.php3?id="+t;
 document.form.submit();
}
</script>


<form method="POST" action="get.php3?id=" name="form"> 
<input type="text" name="T1" size="20"> 
<input type="button" onClick="a()" value="Invia" name="B1"></p> 
</form>


credo