Code

<?php
include "connection.php";

session_start();
if(@$_session['admin'] || @$_session['pengurus'] || @$_session['anggota']){
	header('location: ../pramuka');
} else {

?>
<html>
<head>
	<title>Pramuka SMK Negeri 1 Patumbak</title>
	<link rel="stylesheet" type="text/css" href="style/style-login.css">
</head>
<body>
	<div class="Wrapper">
		<header class="header h-login">
			<div class="header-box">
				<div class="hbox box-logo">
					<img src="image/tunas-pin.png">
				</div>
				<div class="hbox box-title">
					<div class="heading-1">
						PANGKALAN PRAMUKA
					</div>
					<div class="heading-2">
						SMK NEGERI 1 PATUMBAK
					</div>
					<div class="heading-3">
						GUDEP 11.791 - 11.792
					</div>
				</div>
			</div>
		</header>

		<div class="canvas-plogin" align="center">
			<div class="canvas-login">
				<div class="box-login">
					<div class="title-login">
						Login
					</div>
					<div class="img-login">
						<img src="image/lock.png">
					</div>
					<div class="content-login" align="center">
						<form method="post">
							<div class="box-username">
								<input type="text" name="txt_username" class="txt-username" placeholder="Username">
							</div>
							<div class="box-password">
								<input type="password" name="txt_password" class="txt-password" placeholder="Password">
							</div>
							<div class="box-btnlogin">
								<input type="submit" name="btn_login" class="btn-login" value="Log In">
							</div>
						</form>
					</div>
					<div class="procces-register">
						<?php
							@$txt_username = $_POST['txt_username'];
							@$txt_password = $_POST['txt_password'];
							@$btn_login = $_POST['btn_login'];


							if($btn_login){
								if($txt_username == "" || $txt_password == ""){
									echo "Mohon Isi Form Dengan Lengkap!";
								} else {
									$qlogin= mysql_query("SELECT * FROM tbl_user WHERE username_user='$txt_username' and password_user= md5('$txt_password')") or die (mysql_error());

									$data = mysql_fetch_assoc($qlogin) or die (mysql_error());
									$cek = mysql_num_rows($qlogin) or die (mysql_error());
									if($cek >=1){
										if($data['level_user'] == "admin"){
											$_SESSION['admin'] == $data['nama_user'];
											echo "Selamat Datang Admin";
										} else if($data['level_user'] == "pengurus"){
											$_SESSION['pengurus'] == $data['nama_user'];
											echo "Selamat Datang Pengurus";
										} else if ($data['level_user'] == "anggota"){
											$_SESSION['anggota'] == $data['nama_user'];
											echo "Selamat Datang Anggota";
										}
									} else {
										echo "Login Gagal";
									}
								}
							}
						?>
					</div>
					<div class="box-register-login">
						Belum Punya Akun? <a href="register.php">Daftar Disini</a>
					</div>
				</div>
			</div>

			<footer>
				<div class="footer-box">
					<div class="copyright-box" align="left">
						Copyright &copy; 2016 <a href="">Pramuka SMK Negeri 1 Patumbak</a>
					</div>

					<div class="designer-box">
						Designer By <a href="">Richy Tech</a>
					</div>
				</div>
				<div class="box-back-home">
					<a href="../pramuka">
						<div class="back-home">
							<img src="image/home.png" alt="Kembali ke Beranda">
						</div>
					</a>
				</div>
			</footer>
		</div>

	</div>
</body>
</html>

<?php
}
?>