<form name="del_form" action="a_do.php" method="post">
<?php
$link=mysql_connect("localhost","root","123") or die("不能连接数据库:".mysql_error());
mysql_select_db("wgbawei",$link) or die("不能选择数据库：".mysql_error());
mysql_query("set names utf8");

$result=mysql_query("select * from admin");
while($rs=mysql_fetch_array($result)){
?>
<input name="del_id[]" type="checkbox" value="<?=$rs[admin_id]?>" /><?=$rs[admin_name]?>
<?php
}
?>
<input type="submit" value="删除" />
</form>

<?php
$link=mysql_connect("localhost","root","123") or die("不能连接数据库:".mysql_error());
mysql_select_db("wgbawei",$link) or die("不能选择数据库：".mysql_error());
mysql_query("set names utf8");

$id = implode(",",$_POST[‘del_id‘]);
$query = mysql_query("delete from admin where admin_id in (".$id.")");
if ($query) {
 echo "<script>alert(‘批量删除成功！‘)</script>";
 echo "<script>location.href=‘new_list.php‘</script>";
}else {
 echo "<script>alert(‘删除失败‘)</script>";
}
?>