<html>
<head>
<meta/>
<title>Tugas4_JavaScript_Ayunda_1306470211</title>
</head>
<body>
<script>
function konfirmasi() {
var npm = document.forms["coba"]["npm"].value;
if(npm == null || npm == "")
{
alert("NPM tidak boleh kosong");
return false;
} else if(npm != null)
{
if(confirm("NPM Anda " + npm + "?")) {
alert("NPM anda adalah" + npm );
}
else
{
return false;
}
}
}
</script>
<form name="coba" method="post" onSubmit="return konfirmasi()">
<label>NPM :</label><input type="text" name="npm" />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>
Hasilnya:
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