Mas Ellyx gmna bwt alert ok dan cancel untuk delete data???
Ini script delete saya...yg ini hanya ok dan keluar setlah delete dieksekusi

<?php

if (isset($_GET['nis'])) {
	$nis = $_GET['nis'];
} else {
	die ("Error. No nis Selected! ");	
}
?>
<div id="content">
	<?
	//proses delete berita
	if (!empty($nis) && $nis != "") {
		
		$query = "DELETE FROM tb_kelas2a WHERE nis='$nis'";
		$sql = mysql_query ($query);
		if ($sql) {
			echo"<script>alert('Data Berhasil Dihapus')
				location.replace('admin_kelas.php?page=2a')</script>";
		} else {
			echo"<script>alert('Data Gagal Diedit')
				location.replace('admin_kelas.php?page=2a')</script>";
		}
	
		die ("Access Denied");	
	}
	?>
</div>

Makasih Mas Ellyx Sebelumya..

<a href="delete.php" onclick="return confirm('Apakah Anda Yakin Untuk Delete?');">Delete</a>