checkbox删除多项

<form action="delete.php" method="post">
<thead>
  <tr>
	 <th><input class="check-all" type="checkbox" /></th>
	 <th>ID</th>
	 <th>Name</th>
  </tr>
</thead>
<tbody>
 <?php                                                                    foreach($adminlist as $arritem)
        {
 ?>
  <tr> 
        <td>
        <input name='select[]' value="<?php echo $arritem['id'];?>" type="checkbox" />    //这里的name很重要，到delete.php中会调用
        </td>
        <td><?php echo $arritem['id'];?></td>
        <td><?php echo $arritem['name'];?></td>
  </tr>
 <?php
    }
 ?>
</tbody>
       <input type="submit" value="Delete all selected" onclick="javascript:return confirm("Are you sure?")"/>
</form>

delete.php
<?php
$link=mysql_connect("localhost","root",""); 
mysql_select_db("dbname"); 
$id=$_POST['select']; //调用input的name
foreach($id as $ide){ 
$exec="delete from tablename where sID=$ide"; 
$result=mysql_query($exec); 
if((mysql_affected_rows()==0) or (mysql_affected_rows==-1)) 
{ 
echo "没有找到记录，或者删除时出错"; 
exit; 
} 
else{ 
echo "学生信息已经删除"; 
} 
} 
mysql_close(); 
?>