codice:
<!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>
<title>Pagina senza titolo</title>
<script language="javascript" type="text/javascript">
// <!CDATA[
window.onload = function()
{
document.forms[0].onsubmit = function()
{
alert("questa funziona sovrascrive l'altra");
}
}
// ]]>
</script>
</head>
<body>
<form onsubmit="alert('mia funzione tutta sbagliata o inesistente');">
<input id="Submit1" type="submit" value="submit" />
</form>
</body>
</html>