Untitled

<html>
<head>
	<title>Javascript Login</title>
</head>
<body>
		<span style="text-align:center"><h1>Bee Information System</h1></span>
		<form name="sebuahform" method="post" style="
		    border: 4px double #CCC;
		    padding: 10px 5px;
		    width: 200px;
		    margin: 0 auto;
		    border-style: dobke;
		">
				Username : <input type="text" name="username" value=""><br>
				Password : <input type="text" name="password" value=""><br>
				<div style="text-align:right;margin-top:10px"><input type="submit"></div>
			</form>
</body>

<script type="text/javascript">

// mengambil value dari form atas
var get_username = document.formbinus.username.value;
var get_password = document.formbinus.password.value;

// penampung username dan password
var username_arr = ["Admin","User"];
var password_arr = ["123","345"];

// valid atau tidak?
var valid = false;

// looping
for (var i = 0; i < username_arr.length; i++ ) {

	// jika username dan password sama.. misal username_arr[1] dengan password_arr[1] maka valid
	if ( get_username == username_arr[i] && get_password == password_arr[i])) {
		valid = true;
		break;
	}
};

// error
if (valid) {
	alert("login berhasil!");
	return false;
};


if (!valid) {
	alert("login tidak berhasil!");
	return false;
};

</script>

</html>