$liste["id"]; id sini verir
senin dediğin gibi yaptım ama yine olmadı
<table border="1" cellspacing="1" style="border:1.5pt solid #0000FF;" width="100%" id="AutoNumber1" fpstyle="6,011111100">
<tr>
<td width="16%"><font face="Arial Black"
size="2">Haberler</font></td>
</tr>
<?php
include("connect.php");
$sql = mysql_query ("SELECT * FROM `admin` ORDER BY `id` ASC");
while ($liste = mysql_fetch_array($sql)) {
?>
<tr>
<td width="16%"><font face="verdana" size="2"><b><? echo "$liste[0]"; ?></b></font> </td>
<td width="16%"><font face="verdana" size="2"><b><? echo "$liste[1]"; ?></b></font><input name="Sil" type="button" onClick="location.href='delete.php?id=$liste["id"]'" value="Sil"><a href="delete.php?id=$liste["id"]">Sil</a> </td>
</tr>
<?
}
?>
</table>