non capisco perche ricarica la pagina e manda i dati al server
sito www.laboraccio.altervista.org
codice HTML:
<html>
<head>
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.14.1/math.min.js"></script>
<link href="config.css" type="text/css" rel="stylesheet">
</head>
<body>
<div id="form-riconoscimento">
<h4>modulo di riconoscimento</h4>
<table>
<form method="get" action="server.php">
<tr>
<td><input type="text" name="username" placeholder="username" id="username"></td>
<td><button onclick="generaUsername()">genera username</button></td>
</tr>
<tr>
<td><input type="password" name="password" placeholder="password"></td>
</tr>
<tr>
<td><input type="radio" name="opzioneUtente" value="registrareUtente">registrasi</td></tr>
<tr>
<td><input type="radio" name="opzioneUtente" value="loggareUtente">accedere</td>
</tr>
<tr>
<td><input type="submit" value="invio"></td></tr>
</form>
</table>
</div>
<script type="text/javascript">
codiceAlfa = "HAvc13nmsdw";
caratteri = codiceAlfa.split(""); //return array
codici = [];
function generaUsername(){
for(i=0; i<=caratteri.length; i++){
codici.push(caratteri[math.randomInt(caratteri.length)]) ;
}
codice = codici.join(""); //return string
document.getElementById("username").value=codice;
}
</script>
</body>
</html>