Ciao



<script>
<!--
function controlla(form){
if(form.Nome.value==""){
alert("Inserisci il Nome")
form.Nome.focus();
return false;
}
if (document.all||document.getElementById){
for (a=0;a<form.length;a++){
var tempobj=form.elements[a]
if(tempobj.type=="submit)
tempobj.disabled=true;
}
}
}
// -->
</script>
</head>
<body>

<form action="http://www.libero.it" method="post" onSubmit="return controlla(this)" target="_blank">
Nome

<input type="txt" name="Nome">
<input type="submit" value="Clicca">
</form>





Massimo