Prova con questo:
codice:
<script language="JavaScript">

function stopInvio(evento)
{
if((evento.keyCode == 13)||(evento.which==13))
  return false;
else
  return true;
}

function controlloCampo(campo)
{
alert (campo);
}
</script>

<form name="form1" method="get" action="pino.htm">

<input type="text" name="textfield1" 
onKeyPress="return stopInvio(event)" 
onBlur="controlloCampo(document.form1.textfield1.value)">

<input type="text" name="textfield2" 
onKeyPress="return stopInvio(event)" 
onBlur="controlloCampo(document.form1.textfield2.value)">

<input type="text" name="textfield3" 
onKeyPress="return stopInvio(event)" 
onBlur="controlloCampo(document.form1.textfield3.value)">

<input type="submit" name="Submit" value="Submit">
</form>

Dovrebbe funzionare! :gren: :gren: :gren:

P75